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2008-05-01Merge git://git.infradead.org/mtd-2.6Linus Torvalds3-70/+7
* git://git.infradead.org/mtd-2.6: [MTD][NOR] Add physical address to point() method [JFFS2] Track parent inode for directories (for NFS export) [JFFS2] Invert last argument of jffs2_gc_fetch_inode(), make it boolean. [JFFS2] Quiet lockdep false positive. [JFFS2] Clean up jffs2_alloc_inode() and jffs2_i_init_once() [MTD] Delete long-unused jedec.h header file. [MTD] [NAND] at91_nand: use at91_nand_{en,dis}able consistently.
2008-05-01[MTD][NOR] Add physical address to point() methodJared Hulbert2-4/+7
Adding the ability to get a physical address from point() in addition to virtual address. This physical address is required for XIP of userspace code from flash. Signed-off-by: Jared Hulbert <[email protected]> Reviewed-by: Jörn Engel <[email protected]> Acked-by: Nicolas Pitre <[email protected]> Acked-by: Greg Ungerer <[email protected]> Signed-off-by: David Woodhouse <[email protected]>
2008-05-01[PATCH] sanitize anon_inode_getfd()Al Viro1-2/+1
a) none of the callers even looks at inode or file returned by anon_inode_getfd() b) any caller that would try to look at those would be racy, since by the time it returns we might have raced with close() from another thread and that file would be pining for fjords. Signed-off-by: Al Viro <[email protected]>
2008-05-01[PATCH] split linux/file.hAl Viro3-85/+102
Initial splitoff of the low-level stuff; taken to fdtable.h Signed-off-by: Al Viro <[email protected]>
2008-05-01[PATCH] make osf_select() use core_sys_select()Al Viro1-0/+2
... instead of open-coding it Signed-off-by: Al Viro <[email protected]>
2008-05-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds1-18/+1
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: module: add MODULE_STATE_GOING notifier call module: Enhance verify_export_symbols module: set unused_gpl_crcs instead of overwriting unused_crcs module: neaten __find_symbol, rename to find_symbol module: reduce module image and resident size module: make module_sect_attrs private to kernel/module.c
2008-05-01quota: add a convenience macro for filesystemsJan Kara1-0/+3
Note that it cannot be an inline function because we don't have struct super_block prototype... Signed-off-by: Jan Kara <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01jsm: add new supported board to jsm serial driverScott Kilau1-0/+1
Add new PCI Express Neo/JSM board to the supported list of drivers in the JSM driver. Signed-off-by: Scott Kilau <[email protected]> Acked-by: Ananda V <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01sysfs: sysfs_update_group stub for CONFIG_SYSFS=nRandy Dunlap1-0/+6
scsi_transport_spi uses sysfs_update_group() when CONFIG_SYSFS=n, so provide a stub for it. next-20080423/drivers/scsi/scsi_transport_spi.c:1467: error: implicit declaration of function 'sysfs_update_group' make[3]: *** [drivers/scsi/scsi_transport_spi.o] Error 1 Signed-off-by: Randy Dunlap <[email protected]> Cc: Greg KH <[email protected]> Cc: James Bottomley <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01Add a new sysfs_streq() string comparison functionDavid Brownell1-0/+2
Add a new sysfs_streq() string comparison function, which ignores the trailing newlines found in sysfs inputs. By example: sysfs_streq("a", "b") ==> false sysfs_streq("a", "a") ==> true sysfs_streq("a", "a\n") ==> true sysfs_streq("a\n", "a") ==> true This is intended to simplify parsing of sysfs inputs, letting them avoid the need to manually strip off newlines from inputs. Signed-off-by: David Brownell <[email protected]> Acked-by: Greg KH <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01ntp: handle leap second via timerRoman Zippel2-0/+3
Remove the leap second handling from second_overflow(), which doesn't have to check for it every second anymore. With CONFIG_NO_HZ this also makes sure the leap second is handled close to the full second. Additionally this makes it possible to abort a leap second properly by resetting the STA_INS/STA_DEL status bits. Signed-off-by: Roman Zippel <[email protected]> Cc: john stultz <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01ntp: remove current_tick_length()Roman Zippel1-2/+2
current_tick_length used to do a little more, but now it just returns tick_length, which we can also access directly at the few places, where it's needed. Signed-off-by: Roman Zippel <[email protected]> Cc: john stultz <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01ntp: rename TICK_LENGTH_SHIFT to NTP_SCALE_SHIFTRoman Zippel1-4/+4
As TICK_LENGTH_SHIFT is used for more than just the tick length, the name isn't quite approriate anymore, so this renames it to NTP_SCALE_SHIFT. Signed-off-by: Roman Zippel <[email protected]> Cc: john stultz <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01ntp: support for TAIRoman Zippel2-2/+6
This adds support for setting the TAI value (International Atomic Time). The value is reported back to userspace via timex (as we don't have a ntp_gettime() syscall). Signed-off-by: Roman Zippel <[email protected]> Cc: john stultz <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01ntp: increase time_offset resolutionRoman Zippel1-7/+2
time_offset is already a 64bit value but its resolution barely used, so this makes better use of it by replacing SHIFT_UPDATE with TICK_LENGTH_SHIFT. Side note: the SHIFT_HZ in SHIFT_UPDATE was incorrect for CONFIG_NO_HZ and the primary reason for changing time_offset to 64bit to avoid the overflow. Signed-off-by: Roman Zippel <[email protected]> Cc: john stultz <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01ntp: increase time_freq resolutionRoman Zippel1-5/+6
This changes time_freq to a 64bit value and makes it static (the only outside user had no real need to modify it). Intermediate values were already 64bit, so the change isn't that big, but it saves a little in shifts by replacing SHIFT_NSEC with TICK_LENGTH_SHIFT. PPM_SCALE is then used to convert between user space and kernel space representation. Signed-off-by: Roman Zippel <[email protected]> Cc: john stultz <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01ntp: NTP4 user space bits updateRoman Zippel1-3/+9
This adds a few more things from the ntp nanokernel related to user space. It's now possible to select the resolution used of some values via STA_NANO and the kernel reports in which mode it works (pll/fll). If some values for adjtimex() are outside the acceptable range, they are now simply normalized instead of letting the syscall fail. I removed MOD_CLKA/MOD_CLKB as the mapping didn't really makes any sense, the kernel doesn't support setting the clock. Signed-off-by: Roman Zippel <[email protected]> Cc: john stultz <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01remove div_long_long_remRoman Zippel2-50/+1
x86 is the only arch right now, which provides an optimized for div_long_long_rem and it has the downside that one has to be very careful that the divide doesn't overflow. The API is a little akward, as the arguments for the unsigned divide are signed. The signed version also doesn't handle a negative divisor and produces worse code on 64bit archs. There is little incentive to keep this API alive, so this converts the few users to the new API. Signed-off-by: Roman Zippel <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: john stultz <[email protected]> Cc: Christoph Lameter <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01rename div64_64 to div64_u64Roman Zippel1-0/+12
Rename div64_64 to div64_u64 to make it consistent with the other divide functions, so it clearly includes the type of the divide. Move its definition to math64.h as currently no architecture overrides the generic implementation. They can still override it of course, but the duplicated declarations are avoided. Signed-off-by: Roman Zippel <[email protected]> Cc: Avi Kivity <[email protected]> Cc: Russell King <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: David Howells <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Patrick McHardy <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01introduce explicit signed/unsigned 64bit divideRoman Zippel1-0/+72
The current do_div doesn't explicitly say that it's unsigned and the signed counterpart is missing, which is e.g. needed when dealing with time values. This introduces 64bit signed/unsigned divide functions which also attempts to cleanup the somewhat awkward calling API, which often requires the use of temporary variables for the dividend. To avoid the need for temporary variables everywhere for the remainder, each divide variant also provides a version which doesn't return the remainder. Each architecture can now provide optimized versions of these function, otherwise generic fallback implementations will be used. As an example I provided an alternative for the current x86 divide, which avoids the asm casts and using an union allows gcc to generate better code. It also avoids the upper divde in a few more cases, where the result is known (i.e. upper quotient is zero). Signed-off-by: Roman Zippel <[email protected]> Cc: john stultz <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-05-01module: reduce module image and resident sizeRusty Russell1-1/+1
Resulting reduction (x86-64, gcc 4.1.2) with my (special purpose, i.e. much reduced) configurations: - 16k kernel resident size - 180k module resident size - 10k module image size Signed-off-by: Jan Beulich <[email protected]> Signed-off-by: Rusty Russell <[email protected]>
2008-05-01module: make module_sect_attrs private to kernel/module.cRusty Russell1-17/+0
No-one else is using these afaics. Signed-off-by: Jan Beulich <[email protected]> Signed-off-by: Rusty Russell <[email protected]>
2008-05-01Merge branch 'master' of ↵David S. Miller1-1/+1
master.kernel.org:/pub/scm/linux/kernel/git/linville/wireless-2.6
2008-04-30mac80211: use 4-byte mesh sequence numberLuis Carlos Cobo1-1/+1
This follows the new 802.11s/D2.0 draft. Signed-off-by: Luis Carlos Cobo <[email protected]> Signed-off-by: John W. Linville <[email protected]>
2008-04-30klist: fix coding style errors in klist.h and klist.cGreg Kroah-Hartman1-15/+15
Finally clean up the odd spacing in these files. Signed-off-by: Greg Kroah-Hartman <[email protected]>
2008-04-30driver core: remove no longer used "struct class_device"Kay Sievers1-97/+0
Signed-off-by: Kay Sievers <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2008-04-30devres: support addresses greater than an unsigned long via dev_ioremapKumar Gala1-2/+2
Use a resource_size_t instead of unsigned long since some arch's are capable of having ioremap deal with addresses greater than the size of a unsigned long. Signed-off-by: Kumar Gala <[email protected]> Cc: Tejun Heo <[email protected]> Cc: Jeff Garzik <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2008-04-30sysfs: sysfs_update_group stub for CONFIG_SYSFS=nRandy Dunlap1-0/+6
scsi_transport_spi uses sysfs_update_group() when CONFIG_SYSFS=n, so provide a stub for it. next-20080423/drivers/scsi/scsi_transport_spi.c:1467: error: implicit declaration of function 'sysfs_update_group' make[3]: *** [drivers/scsi/scsi_transport_spi.o] Error 1 Signed-off-by: Randy Dunlap <[email protected]> Cc: James Bottomley <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2008-04-30klist: implement klist_add_{after|before}()Tejun Heo1-0/+2
Add klist_add_after() and klist_add_before() which puts a new node after and before an existing node, respectively. This is useful for callers which need to keep klist ordered. Note that synchronizing between simultaneous additions for ordering is the caller's responsibility. Signed-off-by: Tejun Heo <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2008-04-30klist: implement KLIST_INIT() and DEFINE_KLIST()Tejun Heo1-0/+8
klist is missing static initializers and definition helper. Add them. Signed-off-by: Tejun Heo <[email protected]> Cc: Peter Zijlstra <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2008-04-30Merge branch 'release' of ↵Linus Torvalds4-273/+135
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (179 commits) ACPI: Fix acpi_processor_idle and idle= boot parameters interaction acpi: fix section mismatch warning in pnpacpi intel_menlo: fix build warning ACPI: Cleanup: Remove unneeded, multiple local dummy variables ACPI: video - fix permissions on some proc entries ACPI: video - properly handle errors when registering proc elements ACPI: video - do not store invalid entries in attached_array list ACPI: re-name acpi_pm_ops to acpi_suspend_ops ACER_WMI/ASUS_LAPTOP: fix build bug thinkpad_acpi: fix possible NULL pointer dereference if kstrdup failed ACPI: check a return value correctly in acpi_power_get_context() #if 0 acpi/bay.c:eject_removable_drive() eeepc-laptop: add hwmon fan control eeepc-laptop: add backlight eeepc-laptop: add base driver ACPI: thinkpad-acpi: bump up version to 0.20 ACPI: thinkpad-acpi: fix selects in Kconfig ACPI: thinkpad-acpi: use a private workqueue ACPI: thinkpad-acpi: fluff really minor fix ACPI: thinkpad-acpi: use uppercase for "LED" on user documentation ... Fixed conflicts in drivers/acpi/video.c and drivers/misc/intel_menlow.c manually.
2008-04-30Merge branch 'pnp' into releaseLen Brown3-259/+110
2008-04-30inlining: do not allow gcc below version 4 to optimize inliningIngo Molnar1-2/+3
fix the condition to match intention: always use the old inlining behavior on all gcc versions below 4. this should solve the UML build problem. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30Drop the exporting of empty <linux/byteorder/generic.h>Robert P. J. Day4-12/+6
Fix up the contents of <linux/byteorder/> so that it doesn't export a content-free generic.h to user space. This involves: * Removing the __KERNEL__ tests from generic.h and dropping it from Kbuild. * Wrapping the inclusions of generic.h in both big_endian.h and little_endian.h in __KERNEL__ tests. * Shifting big_endian.h and little_endian.h from header-y to unifdef-y in Kbuild. Signed-off-by: Robert P. J. Day <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30Remove "#ifdef __KERNEL__" checks from unexported headersRobert P. J. Day41-130/+1
Remove the "#ifdef __KERNEL__" tests from unexported header files in linux/include whose entire contents are wrapped in that preprocessor test. Signed-off-by: Robert P. J. Day <[email protected]> Cc: David Woodhouse <[email protected]> Cc: Sam Ravnborg <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30add hrtimer specific debugobjects codeThomas Gleixner1-0/+15
hrtimers have now dynamic users in the network code. Put them under debugobjects surveillance as well. Add calls to the generic object debugging infrastructure and provide fixup functions which allow to keep the system alive when recoverable problems have been detected by the object debugging core code. Signed-off-by: Thomas Gleixner <[email protected]> Cc: Greg KH <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Kay Sievers <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30debugobjects: add timer specific object debugging codeThomas Gleixner2-1/+29
Add calls to the generic object debugging infrastructure and provide fixup functions which allow to keep the system alive when recoverable problems have been detected by the object debugging core code. Signed-off-by: Thomas Gleixner <[email protected]> Acked-by: Ingo Molnar <[email protected]> Cc: Greg KH <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Kay Sievers <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30infrastructure to debug (dynamic) objectsThomas Gleixner1-0/+90
We can see an ever repeating problem pattern with objects of any kind in the kernel: 1) freeing of active objects 2) reinitialization of active objects Both problems can be hard to debug because the crash happens at a point where we have no chance to decode the root cause anymore. One problem spot are kernel timers, where the detection of the problem often happens in interrupt context and usually causes the machine to panic. While working on a timer related bug report I had to hack specialized code into the timer subsystem to get a reasonable hint for the root cause. This debug hack was fine for temporary use, but far from a mergeable solution due to the intrusiveness into the timer code. The code further lacked the ability to detect and report the root cause instantly and keep the system operational. Keeping the system operational is important to get hold of the debug information without special debugging aids like serial consoles and special knowledge of the bug reporter. The problems described above are not restricted to timers, but timers tend to expose it usually in a full system crash. Other objects are less explosive, but the symptoms caused by such mistakes can be even harder to debug. Instead of creating specialized debugging code for the timer subsystem a generic infrastructure is created which allows developers to verify their code and provides an easy to enable debug facility for users in case of trouble. The debugobjects core code keeps track of operations on static and dynamic objects by inserting them into a hashed list and sanity checking them on object operations and provides additional checks whenever kernel memory is freed. The tracked object operations are: - initializing an object - adding an object to a subsystem list - deleting an object from a subsystem list Each operation is sanity checked before the operation is executed and the subsystem specific code can provide a fixup function which allows to prevent the damage of the operation. When the sanity check triggers a warning message and a stack trace is printed. The list of operations can be extended if the need arises. For now it's limited to the requirements of the first user (timers). The core code enqueues the objects into hash buckets. The hash index is generated from the address of the object to simplify the lookup for the check on kfree/vfree. Each bucket has it's own spinlock to avoid contention on a global lock. The debug code can be compiled in without being active. The runtime overhead is minimal and could be optimized by asm alternatives. A kernel command line option enables the debugging code. Thanks to Ingo Molnar for review, suggestions and cleanup patches. Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Cc: Greg KH <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Kay Sievers <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30slab: add a flag to prevent debug_free checks on a kmem_cacheThomas Gleixner1-0/+7
This is a preperatory patch for the debugobjects infrastructure. The flag prevents debug_free checks on kmem_caches. This is necessary to avoid resursive calls into a debug mechanism which uses a kmem_cache itself. Signed-off-by: Thomas Gleixner <[email protected]> Acked-by: Ingo Molnar <[email protected]> Cc: Pekka Enberg <[email protected]> Cc: Christoph Lameter <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30Add macros similar to min/max/min_t/max_tHarvey Harrison1-17/+74
Also, change the variable names used in the min/max macros to avoid shadowed variable warnings when min/max min_t/max_t are nested. Small formatting changes to make all the macros have a similar form. [[email protected]: coding-style fixes] [[email protected]: fix v4l build] Signed-off-by: Harvey Harrison <[email protected]> Cc: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Cc: Bartlomiej Zolnierkiewicz <[email protected]> Cc: Jeff Garzik <[email protected]> Cc: Tejun Heo <[email protected]> Cc: Michael Buesch <[email protected]> Cc: "John W. Linville" <[email protected]> Cc: Miklos Szeredi <[email protected]> Cc: Dmitry Torokhov <[email protected]> Cc: Jiri Kosina <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Randy Dunlap <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30Basic braille screen reader supportSamuel Thibault1-0/+4
This adds a minimalistic braille screen reader support. This is meant to be used by blind people e.g. on boot failures or when / cannot be mounted etc and thus the userland screen readers can not work. [[email protected]: fix exports] Signed-off-by: Samuel Thibault <[email protected]> Cc: Jiri Kosina <[email protected]> Cc: Dmitry Torokhov <[email protected]> Acked-by: Alan Cox <[email protected]> Cc: Randy Dunlap <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30reiserfs: use open_bdev_exclChristoph Hellwig1-1/+0
Use the proper helper to open a blockdevice by name for filesystem use, this makes sure it's properly claimed (also added for open-by-number) and gets rid of the struct file abuse. Tested by mounting a reiserfs filesystem with external journal. Signed-off-by: Christoph Hellwig <[email protected]> Cc: Chris Mason <[email protected]> Cc: Jeff Mahoney <[email protected]> Acked-by: Edward Shishkin <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30mm: Add NR_WRITEBACK_TEMP counterMiklos Szeredi1-0/+1
Fuse will use temporary buffers to write back dirty data from memory mappings (normal writes are done synchronously). This is needed, because there cannot be any guarantee about the time in which a write will complete. By using temporary buffers, from the MM's point if view the page is written back immediately. If the writeout was due to memory pressure, this effectively migrates data from a full zone to a less full zone. This patch adds a new counter (NR_WRITEBACK_TEMP) for the number of pages used as temporary buffers. [[email protected]: add vmstat_text for NR_WRITEBACK_TEMP] Signed-off-by: Miklos Szeredi <[email protected]> Cc: Christoph Lameter <[email protected]> Signed-off-by: Lee Schermerhorn <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30mm: bdi: export bdi_writeout_inc()Miklos Szeredi1-0/+2
Fuse needs this for writable mmap support. Signed-off-by: Miklos Szeredi <[email protected]> Cc: Peter Zijlstra <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30mm: bdi: add separate writeback accounting capabilityMiklos Szeredi1-20/+57
Add a new BDI capability flag: BDI_CAP_NO_ACCT_WB. If this flag is set, then don't update the per-bdi writeback stats from test_set_page_writeback() and test_clear_page_writeback(). Misc cleanups: - convert bdi_cap_writeback_dirty() and friends to static inline functions - create a flag that includes all three dirty/writeback related flags, since almst all users will want to have them toghether Signed-off-by: Miklos Szeredi <[email protected]> Cc: Peter Zijlstra <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30mm: bdi: move statistics to debugfsMiklos Szeredi1-0/+6
Move BDI statistics to debugfs: /sys/kernel/debug/bdi/<bdi>/stats Use postcore_initcall() to initialize the sysfs class and debugfs, because debugfs is initialized in core_initcall(). Update descriptions in ABI documentation. Signed-off-by: Miklos Szeredi <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30mm: bdi: allow setting a maximum for the bdi dirty limitPeter Zijlstra2-0/+15
Add "max_ratio" to /sys/class/bdi. This indicates the maximum percentage of the global dirty threshold allocated to this bdi. [[email protected]] - fix parsing in max_ratio_store(). - export bdi_set_max_ratio() to modules - limit bdi_dirty with bdi->max_ratio - document new sysfs attribute Signed-off-by: Peter Zijlstra <[email protected]> Signed-off-by: Miklos Szeredi <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30mm: bdi: allow setting a minimum for the bdi dirty limitPeter Zijlstra1-0/+4
Under normal circumstances each device is given a part of the total write-back cache that relates to its current avg writeout speed in relation to the other devices. min_ratio - allows one to assign a minimum portion of the write-back cache to a particular device. This is useful in situations where you might want to provide a minimum QoS. (One request for this feature came from flash based storage people who wanted to avoid writing out at all costs - they of course needed some pdflush hacks as well) max_ratio - allows one to assign a maximum portion of the dirty limit to a particular device. This is useful in situations where you want to avoid one device taking all or most of the write-back cache. Eg. an NFS mount that is prone to get stuck, or a FUSE mount which you don't trust to play fair. Add "min_ratio" to /sys/class/bdi. This indicates the minimum percentage of the global dirty threshold allocated to this bdi. [[email protected]] - fix parsing in min_ratio_store() - document new sysfs attribute Signed-off-by: Peter Zijlstra <[email protected]> Signed-off-by: Miklos Szeredi <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30mm: bdi: export BDI attributes in sysfsPeter Zijlstra2-0/+12
Provide a place in sysfs (/sys/class/bdi) for the backing_dev_info object. This allows us to see and set the various BDI specific variables. In particular this properly exposes the read-ahead window for all relevant users and /sys/block/<block>/queue/read_ahead_kb should be deprecated. With patient help from Kay Sievers and Greg KH [[email protected]] - split off NFS and FUSE changes into separate patches - document new sysfs attributes under Documentation/ABI - do bdi_class_init as a core_initcall, otherwise the "default" BDI won't be initialized - remove bdi_init_fmt macro, it's not used very much [[email protected]: fix ia64 warning] Signed-off-by: Peter Zijlstra <[email protected]> Cc: Kay Sievers <[email protected]> Acked-by: Greg KH <[email protected]> Cc: Trond Myklebust <[email protected]> Signed-off-by: Miklos Szeredi <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2008-04-30pidns: make pid->level and pid_ns->level unsignedPavel Emelyanov2-2/+2
These values represent the nesting level of a namespace and pids living in it, and it's always non-negative. Turning this from int to unsigned int saves some space in pid.c (11 bytes on x86 and 64 on ia64) by letting the compiler optimize the pid_nr_ns a bit. E.g. on ia64 this removes the sign extension calls, which compiler adds to optimize access to pid->nubers[ns->level]. Signed-off-by: Pavel Emelyanov <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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