diff options
| author | Jiri Olsa <jolsa@redhat.com> | 2017-04-10 16:52:32 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-04-10 19:10:25 +0200 |
| commit | 4ffa3c977b5da2907eb294dc6d0259a02f2284aa (patch) | |
| tree | 7267158eb409425c430d92efcfd529757ed436cb /arch/x86/include | |
| parent | 17f8ba1dca072ce66c25b9e74ea2500b029594a0 (diff) | |
x86/intel_rdt: Add cpus_list rdtgroup file
The resource control filesystem provides only a bitmask based cpus file for
assigning CPUs to a resource group. That's cumbersome with large cpumasks
and non-intuitive when modifying the file from the command line.
Range based cpu lists are commonly used along with bitmask based cpu files
in various subsystems throughout the kernel.
Add 'cpus_list' file which is CPU range based.
# cd /sys/fs/resctrl/
# echo 1-10 > krava/cpus_list
# cat krava/cpus_list
1-10
# cat krava/cpus
0007fe
# cat cpus
fffff9
# cat cpus_list
0,3-23
[ tglx: Massaged changelog and replaced "bitmask lists" by "CPU ranges" ]
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Shaohua Li <shli@fb.com>
Link: http://lkml.kernel.org/r/20170410145232.GF25354@krava
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/intel_rdt.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/intel_rdt.h b/arch/x86/include/asm/intel_rdt.h index 9030bcccb717..611c82306fdf 100644 --- a/arch/x86/include/asm/intel_rdt.h +++ b/arch/x86/include/asm/intel_rdt.h @@ -37,6 +37,9 @@ struct rdtgroup { /* rdtgroup.flags */ #define RDT_DELETED 1 +/* rftype.flags */ +#define RFTYPE_FLAGS_CPUS_LIST 1 + /* List of all resource groups */ extern struct list_head rdt_all_groups; @@ -49,6 +52,7 @@ int __init rdtgroup_init(void); * @name: File name * @mode: Access mode * @kf_ops: File operations + * @flags: File specific RFTYPE_FLAGS_* flags * @seq_show: Show content of the file * @write: Write to the file */ @@ -56,6 +60,7 @@ struct rftype { char *name; umode_t mode; struct kernfs_ops *kf_ops; + unsigned long flags; int (*seq_show)(struct kernfs_open_file *of, struct seq_file *sf, void *v); |