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    SubjectRe: [PATCH] show per-process swap usage via procfs v2
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    On Fri, Nov 6, 2009 at 1:40 PM, KAMEZAWA Hiroyuki
    <kamezawa.hiroyu@jp.fujitsu.com> wrote:
    > From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    >
    > Now, anon_rss and file_rss is counted as RSS and exported via /proc.
    > RSS usage is important information but one more information which
    > is often asked by users is "usage of swap".(user support team said.)
    >
    > This patch counts swap entry usage per process and show it via
    > /proc/<pid>/status. I think status file is robust against new entry.
    > Then, it is the first candidate..
    >
    >  After this, /proc/<pid>/status includes following line
    >  <snip>
    >  VmPeak:   315360 kB
    >  VmSize:   315360 kB
    >  VmLck:         0 kB
    >  VmHWM:    180452 kB
    >  VmRSS:    180452 kB
    >  VmData:   311624 kB
    >  VmStk:        84 kB
    >  VmExe:         4 kB
    >  VmLib:      1568 kB
    >  VmPTE:       640 kB
    >  VmSwap:   131240 kB <=== new information
    >
    > Note:
    >  Because this patch catches swap_pte on page table, this will
    >  not catch shmem's swapout. It's already accounted in per-shmem
    >  inode and we don't need to do more.
    >
    > Changelog: 2009/11/06
    >  - fixed bad use of is_migration_entry. Now, non_swap_entry() is used.
    > Changelog: 2009/11/03
    >  - clean up.
    >  - fixed initialization bug at fork (init_mm())
    >
    > Acked-by: Acked-by; David Rientjes <rientjes@google.com>
    > Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Reviewed-by: Minchan Kim <minchan.kim@gmail.com>

    --
    Kind regards,
    Minchan Kim
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