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cpusets: document proc status cpus and mems allowed lists

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Provide a little documentation for the two new fields, Cpus_allowed_list
and Mems_allowed_list, that were added to each /proc/<pid>/status file a
while back.

Signed-off-by: Paul Jackson <pj@sgi.com>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Paul Jackson
2008-07-04 10:00:01 -07:00
committed by Linus Torvalds
parent 51597acfd3
commit 985ee7f224
1 changed files with 4 additions and 2 deletions
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6
Documentation/cpusets.txt
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@@ -154,13 +154,15 @@ browsing and modifying the cpusets presently known to the kernel. No
new system calls are added for cpusets - all support for querying and new system calls are added for cpusets - all support for querying and
modifying cpusets is via this cpuset file system. modifying cpusets is via this cpuset file system.
The /proc/<pid>/status file for each task has two added lines, The /proc/<pid>/status file for each task has four added lines,
displaying the tasks cpus_allowed (on which CPUs it may be scheduled) displaying the tasks cpus_allowed (on which CPUs it may be scheduled)
and mems_allowed (on which Memory Nodes it may obtain memory), and mems_allowed (on which Memory Nodes it may obtain memory),
in the format seen in the following example: in the two formats seen in the following example:
Cpus_allowed: ffffffff,ffffffff,ffffffff,ffffffff Cpus_allowed: ffffffff,ffffffff,ffffffff,ffffffff
Cpus_allowed_list: 0-127
Mems_allowed: ffffffff,ffffffff Mems_allowed: ffffffff,ffffffff
Mems_allowed_list: 0-63
Each cpuset is represented by a directory in the cgroup file system Each cpuset is represented by a directory in the cgroup file system
containing (on top of the standard cgroup files) the following containing (on top of the standard cgroup files) the following