Re: [PATCH] show per-process swap usage via procfs v2
From: Minchan Kim
Date: Fri Nov 06 2009 - 10:19:36 EST
On Fri, Nov 6, 2009 at 1:40 PM, KAMEZAWA Hiroyuki
> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
> 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
> 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
> 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@xxxxxxxxxx>
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx>
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