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Pull ARM fixes from Russell King:
"These are a number of updates to fix a few problems found in the ARM
nommu code over the last couple of years, caused mostly by changes on
the mmu side"
* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: 8573/1: domain: move {set,get}_domain under config guard
ARM: 8572/1: nommu: change memory reserve for the vectors
ARM: 8571/1: nommu: fix PMSAv7 setup
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
- deadlock fixes on driver probe at exynos4-is and s43-camif drivers
- a build breakage if media controller is enabled and USB or PCI is
built as module.
* tag 'media/v4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
[media] media-device: fix builds when USB or PCI is compiled as module
[media] media: s3c-camif: fix deadlock on driver probe()
[media] media: exynos4-is: fix deadlock on driver probe
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
"An ahci driver addition and updates to ahci port enable handling for
some platform devices"
* 'for-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
ata: add AMD Seattle platform driver
ARM: dts: apq8064: add ahci ports-implemented mask
ata: ahci-platform: Add ports-implemented DT bindings.
libahci: save port map for forced port map
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git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Pull rdma fix from Doug Ledford:
"Fix for max sector calculation in iSER"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
IB/iser: Fix max_sectors calculation
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Joseph reported that a XEN guest dies with a division by 0 in the package
topology setup code. This happens if cpu_info.x86_max_cores is zero.
Handle that case and emit a warning. This does not fix the underlying XEN bug,
but makes the code more robust.
Reported-and-tested-by: Joseph Salisbury <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: David Vrabel <[email protected]>
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1605062046270.3540@nanos
Signed-off-by: Thomas Gleixner <[email protected]>
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The following commit:
34e2c555f3e1 ("cpufreq: Add mechanism for registering utilization update callbacks")
overlooked the fact that update_load_avg(), where CFS invokes cpufreq
utilization update callbacks, becomes an empty stub on UP kernels.
In consequence, if !CONFIG_SMP, cpufreq governors are never invoked
from CFS and they do not have a chance to evaluate CPU performace
levels and update them often enough.
Needless to say, things don't work as expected then.
Fix the problem by making the !CONFIG_SMP stub of update_load_avg()
invoke cpufreq update callbacks too.
Reported-by: Steve Muckle <[email protected]>
Tested-by: Steve Muckle <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Acked-by: Steve Muckle <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Linux PM list <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Srinivas Pandruvada <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Viresh Kumar <[email protected]>
Fixes: 34e2c555f3e1 (cpufreq: Add mechanism for registering utilization update callbacks)
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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Currently KASLR only supports relocation in a small physical range (from
16M to 1G), due to using the initial kernel page table identity mapping.
To support ranges above this, we need to have an identity mapping for the
desired memory range before we can decompress (and later run) the kernel.
32-bit kernels already have the needed identity mapping. This patch adds
identity mappings for the needed memory ranges on 64-bit kernels. This
happens in two possible boot paths:
If loaded via startup_32(), we need to set up the needed identity map.
If loaded from a 64-bit bootloader, the bootloader will have already
set up an identity mapping, and we'll start via the compressed kernel's
startup_64(). In this case, the bootloader's page tables need to be
avoided while selecting the new uncompressed kernel location. If not,
the decompressor could overwrite them during decompression.
To accomplish this, we could walk the pagetable and find every page
that is used, and add them to mem_avoid, but this needs extra code and
will require increasing the size of the mem_avoid array.
Instead, we can create a new set of page tables for our own identity
mapping instead. The pages for the new page table will come from the
_pagetable section of the compressed kernel, which means they are
already contained by in mem_avoid array. To do this, we reuse the code
from the uncompressed kernel's identity mapping routines.
The _pgtable will be shared by both the 32-bit and 64-bit paths to reduce
init_size, as now the compressed kernel's _rodata to _end will contribute
to init_size.
To handle the possible mappings, we need to increase the existing page
table buffer size:
When booting via startup_64(), we need to cover the old VO, params,
cmdline and uncompressed kernel. In an extreme case we could have them
all beyond the 512G boundary, which needs (2+2)*4 pages with 2M mappings.
And we'll need 2 for first 2M for VGA RAM. One more is needed for level4.
This gets us to 19 pages total.
When booting via startup_32(), KASLR could move the uncompressed kernel
above 4G, so we need to create extra identity mappings, which should only
need (2+2) pages at most when it is beyond the 512G boundary. So 19
pages is sufficient for this case as well.
The resulting BOOT_*PGT_SIZE defines use the "_SIZE" suffix on their
names to maintain logical consistency with the existing BOOT_HEAP_SIZE
and BOOT_STACK_SIZE defines.
This patch is based on earlier patches from Yinghai Lu and Baoquan He.
Signed-off-by: Kees Cook <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Young <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Jiri Kosina <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vivek Goyal <[email protected]>
Cc: Yinghai Lu <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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In order to support on-demand page table creation when moving the
kernel for KASLR, we need to use kernel_ident_mapping_init() in the
decompression code.
This splits it out into its own file for use outside of init_64.c.
Additionally, checking for __pa/__va defines is added since they
need to be overridden in the decompression code.
[kees: rewrote changelog]
Signed-off-by: Yinghai Lu <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Young <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vivek Goyal <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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Before adding more defines to asm/boot.h, this cleans up the existing
indenting for readability.
Suggested-by: Ingo Molnar <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dave Young <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vivek Goyal <[email protected]>
Cc: Yinghai Lu <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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This attempts to improve the comments that describe how the memory
range used for decompression is avoided. Additionally uses an enum
instead of raw numbers for the mem_avoid[] indexing.
Suggested-by: Borislav Petkov <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yinghai Lu <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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Pass them down as 'unsigned long' directly and get rid of more casting and
assignments.
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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There are no callers except through the file_operations struct below
this, so it should be static like everything else here.
Signed-off-by: Peter Jones <[email protected]>
Signed-off-by: Matt Fleming <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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The parameters atomic and duplicates of efivar_init always have opposite
values. Drop the parameter atomic, replace the uses of !atomic with
duplicates, and update the call sites accordingly.
The code using duplicates is slightly reorganized with an 'else', to avoid
duplicating the lock code.
Signed-off-by: Julia Lawall <[email protected]>
Signed-off-by: Matt Fleming <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Jeremy Kerr <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Saurabh Sengar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vaishali Thakkar <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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Dan Carpenter reports that passing the address of the pointer to the
kmalloc()'d memory for 'capsule' is dangerous:
"drivers/firmware/efi/capsule.c:109 efi_capsule_supported()
warn: did you mean to pass the address of 'capsule'
108
109 status = efi.query_capsule_caps(&capsule, 1, &max_size, reset);
^^^^^^^^
If we modify capsule inside this function call then at the end of the
function we aren't freeing the original pointer that we allocated."
Ard Biesheuvel noted that we don't even need to call kmalloc() since the
object we allocate isn't very big and doesn't need to persist after the
function returns.
Place 'capsule' on the stack instead.
Suggested-by: Ard Biesheuvel <[email protected]>
Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Matt Fleming <[email protected]>
Acked-by: Ard Biesheuvel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Bryan O'Donoghue <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Kweh Hock Leong <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: joeyli <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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GCC complains about a newly added file for the EFI Bootloader Control:
drivers/firmware/efi/efibc.c: In function 'efibc_set_variable':
drivers/firmware/efi/efibc.c:53:1: error: the frame size of 2272 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
The problem is the declaration of a local variable of type struct
efivar_entry, which is by itself larger than the warning limit of 1024
bytes.
Use dynamic memory allocation instead of stack memory for the entry
object.
This patch also fixes a potential buffer overflow.
Reported-by: Ingo Molnar <[email protected]>
Reported-by: Arnd Bergmann <[email protected]>
Signed-off-by: Jeremy Compostella <[email protected]>
[ Updated changelog to include GCC error ]
Signed-off-by: Matt Fleming <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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Taking a mutex in the reboot path is bogus because we cannot sleep
with interrupts disabled, such as when rebooting due to panic(),
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:97
in_atomic(): 0, irqs_disabled(): 1, pid: 7, name: rcu_sched
Call Trace:
dump_stack+0x63/0x89
___might_sleep+0xd8/0x120
__might_sleep+0x49/0x80
mutex_lock+0x20/0x50
efi_capsule_pending+0x1d/0x60
native_machine_emergency_restart+0x59/0x280
machine_emergency_restart+0x19/0x20
emergency_restart+0x18/0x20
panic+0x1ba/0x217
In this case all other CPUs will have been stopped by the time we
execute the platform reboot code, so 'capsule_pending' cannot change
under our feet. We wouldn't care even if it could since we cannot wait
for it complete.
Also, instead of relying on the external 'system_state' variable just
use a reboot notifier, so we can set 'stop_capsules' while holding
'capsule_mutex', thereby avoiding a race where system_state is updated
while we're in the middle of efi_capsule_update_locked() (since CPUs
won't have been stopped at that point).
Signed-off-by: Matt Fleming <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Bryan O'Donoghue <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Kweh Hock Leong <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: joeyli <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
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Signed-off-by: Ingo Molnar <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
User visible changes:
- Fix ordering of kernel/user entries in 'caller' mode, where the kernel and
user parts were being correctly inverted but kept in place wrt each other,
i.e. 'callee' (k1, k2, u3, u4) became 'caller' (k2, k1, u4, u3) when it
should be 'caller' (u4, u3, k2, k1) (Chris Phlipot)
- In 'perf trace' don't print the raw arg syscall args for a syscall that has
no arguments, like gettid(). This was happening because just checking if
the syscall args list is NULL may mean that there are no args (e.g.: gettid)
or that there is no tracepoint info (e.g.: clone) (Arnaldo Carvalho de Melo)
- Add extra output of counter values with 'perf stat -vv' (Andi Kleen)
Infrastructure changes:
- Expose callchain db export via the python API (Chris Phlipot)
Code reorganization:
- Move some more syscall arg beautifiers from the 'perf trace' main file to
separate files in tools/perf/trace/beauty/, to reduce the main file line
count (Arnaldo Carvalho de Melo)
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
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When we fail to set the flooding configuration for the broadcast and
unregistered multicast traffic, we should revert the flooding
configuration of the unknown unicast traffic.
Fixes: 0293038e0c36 ("mlxsw: spectrum: Add support for flood control")
Signed-off-by: Ido Schimmel <[email protected]>
Signed-off-by: Jiri Pirko <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Make the leave procedure in the error path symmetric to the join
procedure and first remove the port from the collector before
potentially destroying the LAG.
Fixes: 0d65fc13042f ("mlxsw: spectrum: Implement LAG port join/leave")
Signed-off-by: Ido Schimmel <[email protected]>
Signed-off-by: Jiri Pirko <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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UDP tunnel segmentation code relies on the inner offsets being set for
an UDP tunnel GSO packet, but the inner *_complete() functions will
set the inner offsets only if 'encapsulation' is set before calling
them. Currently, udp_gro_complete() sets 'encapsulation' only after
the inner *_complete() functions are done. This causes the inner
offsets having invalid values after udp_gro_complete() returns, which
in turn will make it impossible to properly segment the packet in case
it needs to be forwarded, which would be visible to the user either as
invalid packets being sent or as packet loss.
This patch fixes this by setting skb's 'encapsulation' in
udp_gro_complete() before calling into the inner complete functions,
and by making each possible UDP tunnel gro_complete() callback set the
inner_mac_header to the beginning of the tunnel payload.
Signed-off-by: Jarno Rajahalme <[email protected]>
Reviewed-by: Alexander Duyck <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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The setting of the UDP tunnel GSO type is already performed by
udp[46]_gro_complete().
Signed-off-by: Jarno Rajahalme <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Pull writeback fix from Jens Axboe:
"Just a single fix for domain aware writeback, fixing a regression that
can cause balance_dirty_pages() to keep looping while not getting any
work done"
* 'for-linus' of git://git.kernel.dk/linux-block:
writeback: Fix performance regression in wb_over_bg_thresh()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"This contains two fixes: a boot fix for older SGI/UV systems, and an
APIC calibration fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO
x86/platform/UV: Bring back the call to map_low_mmrs in uv_system_init
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qede requires qed to provide enough resources to accommodate 16 combined
channels, but that upper-bound isn't actually being enforced by it.
Instead, qed inform back to qede how many channels can be opened based on
available resources - but that calculation doesn't really take into account
the resources requested by qede; Instead it considers other FW/HW available
resources.
As a result, if a user would increase the number of channels to more than
16 [e.g., using ethtool] the chip would hang.
This change increments the resources requested by qede to 64 combined
channels instead of 16; This value is an upper bound on the possible
available channels [due to other FW/HW resources].
Signed-off-by: Sudarsana Reddy Kalluru <[email protected]>
Signed-off-by: Yuval Mintz <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Responses for packets to unused ports are getting lost with L3 domains.
IPv4 has ip_send_unicast_reply for sending TCP responses which accounts
for L3 domains; update the IPv6 counterpart tcp_v6_send_response.
For icmp the L3 master check needs to be moved up in icmp6_send
to properly respond to UDP packets to a port with no listener.
Fixes: ca254490c8df ("net: Add VRF support to IPv6 stack")
Signed-off-by: David Ahern <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI fixes from Rafael Wysocki:
"Fixes for problems introduced or discovered recently (intel_pstate,
sti-cpufreq, ARM64 cpuidle, Operating Performance Points framework,
generic device properties framework) and one fix for a hotplug-related
deadlock in ACPICA that's been there forever, but is nasty enough.
Specifics:
- Fix for a recent regression in the intel_pstate driver causing it
to fail to restore the HWP (HW-managed P-states) configuration of
the boot CPU after suspend-to-RAM (Rafael Wysocki).
- Fix for two recent regressions in the intel_pstate driver, one that
can trigger a divide by zero if the driver is accessed via sysfs
before it manages to take the first sample and one causing it to
fail to update a structure field used in a trace point, so the
information coming from it is less useful (Rafael Wysocki).
- Fix for a problem in the sti-cpufreq driver introduced during the
4.5 cycle that causes it to break CPU PM in multi-platform kernels
by registering cpufreq-dt (which subsequently doesn't work)
unconditionally and preventing the driver that would actually work
from registering (Sudeep Holla).
- Stable-candidate fix for an ARM64 cpuidle issue causing idle state
usage counters to be incorrectly updated for idle states that were
not entered due to errors (James Morse).
- Fix for a recently introduced issue in the OPP (Operating
Performance Points) framework causing it to print bogus error
messages for missing optional regulators (Viresh Kumar).
- Fix for a recently introduced issue in the generic device
properties framework that may cause it to attempt to dereferece and
invalid pointer in some cases (Heikki Krogerus).
- Fix for a deadlock in the ACPICA core that may be triggered by
device (eg Thunderbolt) hotplug (Prarit Bhargava)"
* tag 'pm+acpi-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / OPP: Remove useless check
ACPICA: Dispatcher: Update thread ID for recursive method calls
intel_pstate: Fix intel_pstate_get()
cpufreq: intel_pstate: Fix HWP on boot CPU after system resume
cpufreq: st: enable selective initialization based on the platform
ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value
device property: Avoid potential dereferences of invalid pointers
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
"This contains a single fix that fixes a nohz tick stopping bug when
mixed-poliocy SCHED_FIFO and SCHED_RR tasks are present on a runqueue"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
nohz/full, sched/rt: Fix missed tick-reenabling bug in sched_can_stop_tick()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"This tree contains two fixes: new Intel CPU model numbers and an
AMD/iommu uncore PMU driver fix"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/amd/iommu: Do not register a task ctx for uncore like PMUs
perf/x86: Add model numbers for Kabylake CPUs
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fixes from Ingo Molnar:
"This tree contains three fixes: a console spam fix, a file pattern fix
and a sysfb_efi fix for a bug that triggered on older ThinkPads"
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/sysfb_efi: Fix valid BAR address range check
x86/efi-bgrt: Switch all pr_err() to pr_notice() for invalid BGRT
MAINTAINERS: Remove asterisk from EFI directory names
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fix from Helge Deller:
"Patch from Dmitry V Levin to fix a kernel crash when a straced process
calls the (invalid) syscall which is equal to value of __NR_Linux_syscalls"
* 'parisc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls
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git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC fixes from Vineet Gupta:
"Late in the cycle, but this has fixes for couple of issues: a PAE40
boot crash and Arnd spotting lack of barriers in BE io-accessors.
The 3rd patch for enabling highmem in low physical mem ;-) honestly is
more than a "fix" but its been in works for some time, seems to be
stable in testing and enables 2 of our customers to go forward with
4.6 kernel.
- Fix for PTE truncation in PAE40 builds
- Fix for big endian IO accessors lacking IO barrier
- Allow HIGHMEM to work with low physical addresses"
* tag 'arc-4.6-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: support HIGHMEM even without PAE40
ARC: Fix PAE40 boot failures due to PTE truncation
ARC: Add missing io barriers to io{read,write}{16,32}be()
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fix from Michael Ellerman:
"Fix bad inline asm constraint in create_zero_mask() from Anton
Blanchard"
* tag 'powerpc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc: Fix bad inline asm constraint in create_zero_mask()
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Pull drm fixes from Dave Airlie:
"Fixes for i915, amdgpu/radeon and imx.
The IMX fix is for an autoloading regression found in Fedora. The
radeon fixes, are the same fix to amdgpu/radeon to avoid a hardware
lockup in some circumstances with a bad mode, and a double free bug I
took a few hours chasing down the other morning.
The i915 fixes are across the board, all stable material, and fixing
some hangs and suspend/resume issues, along with a live status
regressions"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading
drm/amdgpu: make sure vertical front porch is at least 1
drm/radeon: make sure vertical front porch is at least 1
drm/amdgpu: set metadata pointer to NULL after freeing.
drm/i915: Make RPS EI/thresholds multiple of 25 on SNB-BDW
drm/i915: Fake HDMI live status
drm/i915: Fix eDP low vswing for Broadwell
drm/i915/ddi: Fix eDP VDD handling during booting and suspend/resume
drm/i915: Fix system resume if PCI device remained enabled
drm/i915: Avoid stalling on pending flips for legacy cursor updates
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'spi/fix/pxa2xx' and 'spi/fix/ti-qspi' into spi-linus
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I had relied on the kbuild robot for cross build coverage, however it
only builds alpha_defconfig. Switch from HPAGE_SIZE to PMD_SIZE, which
is more widely defined.
Fixes: 658922e57b84 ("libnvdimm, pfn: fix memmap reservation sizing")
Cc: <[email protected]>
Reported-by: Guenter Roeck <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
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With the newly introduced helper functions the skb pulling is hidden
in the checksumming function - and undone before returning to the
caller.
The IGMP and MLD query parsing functions in the bridge still
assumed that the skb is pointing to the beginning of the IGMP/MLD
message while it is now kept at the beginning of the IPv4/6 header.
If there is a querier somewhere else, then this either causes
the multicast snooping to stay disabled even though it could be
enabled. Or, if we have the querier enabled too, then this can
create unnecessary IGMP / MLD query messages on the link.
Fixing this by taking the offset between IP and IGMP/MLD header into
account, too.
Fixes: 9afd85c9e455 ("net: Export IGMP/MLD message validation code")
Reported-by: Simon Wunderlich <[email protected]>
Signed-off-by: Linus Lüssing <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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To reduce the size of builtin-trace.c.
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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To reduce the size of builtin-trace.c.
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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To reduce the size of builtin-trace.c.
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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Add debug output of raw counter values per CPU when perf stat -v is
specified, together with their cpu numbers. This is very useful to
debug problems with per core counters, where we can normally only see
aggregated values.
v2: Make it depend on -vv, not -v
Signed-off-by: Andi Kleen <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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Update the export-to-postgresql.py to support the newly introduced
callchain export.
callchains are added into the existing call_paths table and can now
be associated with samples when the "callpaths" commandline option
is used with the script.
Ex.:
$ perf script -s export-to-postgresql.py example_db all callchains
Includes the following changes to enable callchain export via the python export
APIs:
- Add the "callchains" commandline option, which is used to enable
callchain export by setting the perf_db_export_callchains global
- Add perf_db_export_callchains checks for call_path table creation
and population.
- Add call_path_id to samples_table to conform with the new API
example usage and output using a small test app:
test_app.c:
volatile int x = 0;
void inc_x_loop()
{
int i;
for(i=0; i<100000000; i++)
x++;
}
void a()
{
inc_x_loop();
}
void b()
{
inc_x_loop();
}
int main()
{
a();
b();
return 0;
}
example usage:
$ gcc -g -O0 test_app.c
$ perf record --call-graph=dwarf ./a.out
[ perf record: Woken up 77 times to write data ]
[ perf record: Captured and wrote 19.373 MB perf.data (2404 samples) ]
$ perf script -s scripts/python/export-to-postgresql.py
example_db all callchains
$ psql example_db
example_db=#
SELECT
(SELECT name FROM symbols WHERE id = cps.symbol_id) as symbol,
(SELECT name FROM symbols WHERE id =
(SELECT symbol_id from call_paths where id = cps.parent_id))
as parent_symbol,
sum(period) as event_count
FROM samples join call_paths as cps on call_path_id = cps.id
GROUP BY cps.id,evsel_id
ORDER BY event_count DESC
LIMIT 5;
symbol | parent_symbol | event_count
------------------+--------------------------+-------------
inc_x_loop | a | 734250982
inc_x_loop | b | 731028057
unknown | unknown | 1335858
task_tick_fair | scheduler_tick | 1238842
update_wall_time | tick_do_update_jiffies64 | 650373
(5 rows)
The above data shows total "self time" in cycles for each call path that was
sampled. It is intended to demonstrate how it accounts separately for the two
ways to reach the "inc_x_loop" function(via "a" and "b"). Recursive common
table expressions can be used as well to get cumulative time spent in a
function as well, but that is beyond the scope of this basic example.
Signed-off-by: Chris Phlipot <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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This change allows python scripts to be able to utilize the recent
changes to the db export api allowing the export of call_paths derived
from sampled callchains. These call paths are also now associated with
the samples from which they were derived.
- This feature is enabled by setting "perf_db_export_callchains" to true
- When enabled, samples that have callchain information will have the
callchains exported via call_path_table
- The call_path_id field is added to sample_table to enable association of
samples with the corresponding callchain stored in the call paths
table. A call_path_id of 0 will be exported if there is no
corresponding callchain.
- When "perf_db_export_callchains" and "perf_db_export_calls" are both
set to True, the call path root data structure will be shared. This
prevents duplicating of data and call path ids that would result from
building two separate call path trees in memory.
- The call_return_processor structure definition was relocated to the header
file to make its contents visible to db-export.c. This enables the
sharing of call path trees between the two features, as mentioned
above.
This change is visible to python scripts using the python db export api.
The change is backwards compatible with scripts written against the
previous API, assuming that the scripts model the sample_table function
after the one in export-to-postgresql.py script by allowing for
additional arguments to be added in the future. ie. using *x as the
final argument of the sample_table function.
Signed-off-by: Chris Phlipot <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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The exported sample now contains a reference to the call_path_id that
represents its callchain.
While callchains themselves are nice to have, being able to associate
them with samples makes them much more useful, and can allow for such
things as determining how much cumulative time is spent in a particular
function. This information is normally possible to get from the call
return processor. However, when doing normal sampling, call/return
information is not available, thus necessitating the need for
associating samples directly with call paths.
This commit include changes to db-export layer to make this information
available for subsequent patches in this change set, but by itself, does
not make any changes visible to the user.
Signed-off-by: Chris Phlipot <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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This change enables the db export api to export callchains. This is
accomplished by adding callchains obtained from samples to the
call_path_root structure and exporting them via the current call path
export API.
While the current API does support exporting call paths, this is not
supported when sampling. This commit addresses that missing feature by
allowing the export of call paths when callchains are present in
samples.
Summary:
- This feature is activated by initializing the call_path_root member
inside the db_export structure to a non-null value.
- Callchains are resolved with thread__resolve_callchain() and then stored
and exported by adding a call path under call path root.
- Symbol and DSO for each callchain node are exported via db_ids_from_al()
This commit puts in place infrastructure to be used by subsequent commits,
and by itself, does not introduce any user-visible changes.
Signed-off-by: Chris Phlipot <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
[ Made adjustments suggested by Adrian Hunter, see thread via this cset's Link: tag ]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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Move the call path handling code out of thread-stack.c and
thread-stack.h to allow other components that are not part of
thread-stack to create call paths.
Summary:
- Create call-path.c and call-path.h and add them to the build.
- Move all call path related code out of thread-stack.c and thread-stack.h
and into call-path.c and call-path.h.
- A small subset of structures and functions are now visible through
call-path.h, which is required for thread-stack.c to continue to
compile.
This change is a prerequisite for subsequent patches in this change set
and by itself contains no user-visible changes.
Signed-off-by: Chris Phlipot <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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Do not load one entry beyond the end of the syscall table when the
syscall number of a traced process equals to __NR_Linux_syscalls.
Similar bug with regular processes was fixed by commit 3bb457af4fa8
("[PARISC] Fix bug when syscall nr is __NR_Linux_syscalls").
This bug was found by strace test suite.
Cc: [email protected]
Signed-off-by: Dmitry V. Levin <[email protected]>
Acked-by: Helge Deller <[email protected]>
Signed-off-by: Helge Deller <[email protected]>
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No need for an extra notifier. We don't need to handle all these states. It's
sufficient to kill the timer when the cpu dies.
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
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No need for an extra notifier.
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
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The scheduler can handle per cpu threads before the cpu is set to active and
it does not allow user space threads on the cpu before active is
set. Attaching to the scheduling domains is also not required before user
space threads can be handled.
Move the activation to the end of the hotplug state space. That also means
that deactivation is the first action when a cpu is shut down.
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
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