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| author |   Hugh Dickins <hugh.dickins@tiscali.co.uk> | 2009-09-21 17:02:11 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 07:17:32 -0700 |
| commit | 473b0ce4d13ee77925a7062e25dea0d16a91f654 (patch) | |
| tree | 965433f77af7ddce5d9911e353e13af6db9ea311 /include | |
| parent | ksm: move pages_sharing updates (diff) | |
| download | linux-dev-473b0ce4d13ee77925a7062e25dea0d16a91f654.tar.xz linux-dev-473b0ce4d13ee77925a7062e25dea0d16a91f654.zip | |
ksm: pages_unshared and pages_volatile
The pages_shared and pages_sharing counts give a good picture of how
successful KSM is at sharing; but no clue to how much wasted work it's
doing to get there. Add pages_unshared (count of unique pages waiting
in the unstable tree, hoping to find a mate) and pages_volatile.
pages_volatile is harder to define. It includes those pages changing
too fast to get into the unstable tree, but also whatever other edge
conditions prevent a page getting into the trees: a high value may
deserve investigation. Don't try to calculate it from the various
conditions: it's the total of rmap_items less those accounted for.
Also show full_scans: the number of completed scans of everything
registered in the mm list.
The locking for all these counts is simply ksm_thread_mutex.
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Acked-by: Izik Eidus <ieidus@redhat.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions