diff options
| author | Petr Cermak <petrcermak@chromium.org> | 2015-01-08 13:30:15 +1100 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2015-01-08 13:30:15 +1100 |
| commit | f7d4dc0f5747aaf515efc4c971276b31e60b306e (patch) | |
| tree | 0a0031c0169b31c4cc7f4494574675f09c87777d /Documentation | |
| parent | cda15e17952de20e707050488e097c3a8168ea00 (diff) | |
fs/proc/task_mmu.c: add user-space support for resetting mm->hiwater_rss (peak RSS)
Peak resident size of a process can be reset back to the process's current
rss value by writing "5" to /proc/pid/clear_refs. The driving use-case
for this would be getting the peak RSS value, which can be retrieved from
the VmHWM field in /proc/pid/status, per benchmark iteration or test
scenario.
[akpm@linux-foundation.org: clarify behaviour in documentation]
Signed-off-by: Petr Cermak <petrcermak@chromium.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Primiano Tucci <primiano@chromium.org>
Cc: Petr Cermak <petrcermak@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/proc.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index 3ff7e93dae97..13b5809beba7 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -488,6 +488,10 @@ To clear the bits for the file mapped pages associated with the process To clear the soft-dirty bit > echo 4 > /proc/PID/clear_refs +To reset the peak resident set size ("high water mark") to the process's +current value: + > echo 5 > /proc/PID/clear_refs + Any other value written to /proc/PID/clear_refs will have no effect. The /proc/pid/pagemap gives the PFN, which can be used to find the pageflags |