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| author | Vladimir Davydov <vdavydov@parallels.com> | 2015-09-10 00:35:38 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-10 22:29:01 +0200 |
| commit | 80ae2fdceba8313b0433f899bdd9c6c463291a17 (patch) | |
| tree | c8e6d0d5edcd0306ee939d3362028511e33bf97b /Documentation/vm/pagemap.txt | |
| parent | memcg: zap try_get_mem_cgroup_from_page (diff) | |
| download | linux-80ae2fdceba8313b0433f899bdd9c6c463291a17.tar.xz linux-80ae2fdceba8313b0433f899bdd9c6c463291a17.zip | |
proc: add kpagecgroup file
/proc/kpagecgroup contains a 64-bit inode number of the memory cgroup each
page is charged to, indexed by PFN. Having this information is useful for
estimating a cgroup working set size.
The file is present if CONFIG_PROC_PAGE_MONITOR && CONFIG_MEMCG.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Reviewed-by: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Greg Thelen <gthelen@google.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/vm/pagemap.txt')
| -rw-r--r-- | Documentation/vm/pagemap.txt | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/vm/pagemap.txt b/Documentation/vm/pagemap.txt index 3cd38438242a..ce294b0aace4 100644 --- a/Documentation/vm/pagemap.txt +++ b/Documentation/vm/pagemap.txt @@ -5,7 +5,7 @@ pagemap is a new (as of 2.6.25) set of interfaces in the kernel that allow userspace programs to examine the page tables and related information by reading files in /proc. -There are three components to pagemap: +There are four components to pagemap: * /proc/pid/pagemap. This file lets a userspace process find out which physical frame each virtual page is mapped to. It contains one 64-bit @@ -71,6 +71,10 @@ There are three components to pagemap: 23. BALLOON 24. ZERO_PAGE + * /proc/kpagecgroup. This file contains a 64-bit inode number of the + memory cgroup each page is charged to, indexed by PFN. Only available when + CONFIG_MEMCG is set. + Short descriptions to the page flags: 0. LOCKED |