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    SubjectRe: [PATCH 0/3] fix stale swap cache account leak in memcg v7
    On Wed, 13 May 2009 09:31:27 +0900
    KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:

    > On Tue, 12 May 2009 15:21:58 +0530
    > Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
    >
    > > > The patch set includes followng
    > > > [1/3] add mem_cgroup_is_activated() function. which tell us memcg is _really_ used.
    > > > [2/3] fix swap cache handling race by avoidng readahead.
    > > > [3/3] fix swap cache handling race by check swapcount again.
    > > >
    > > > Result is good under my test.
    > >
    > > What was the result (performance data impact) of disabling swap
    > > readahead? Otherwise, this looks the most reasonable set of patches
    > > for this problem.
    > >
    > I'll measure some and report it in the next post.
    >
    I confirmed there are cases which swapin readahead works very well....

    Nishimura-san, could you post a patch for fixing leak at writeback ? as [3/3]
    I'd like to fix readahead case...with some large patch.

    Hm, I didn't think this problem took 2 months to be fixed ;(

    -Kame



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