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    SubjectRe: [PATCH] mm, lockdep: annotate reclaim context to zone reclaim too
    2010/1/2 Peter Zijlstra <>:
    > On Fri, 2010-01-01 at 18:45 +0900, KOSAKI Motohiro wrote:
    >> Commit cf40bd16fd (lockdep: annotate reclaim context) introduced reclaim
    >> context annotation. But it didn't annotate zone reclaim. This patch do it.
    > And yet you didn't CC anyone involved in that patch, nor explain why you
    > think it necessary, massive FAIL.
    > The lockdep annotations cover all of kswapd() and direct reclaim through
    > __alloc_pages_direct_reclaim(). So why would you need an explicit
    > annotation in __zone_reclaim()?

    Thanks CCing. The point is zone-reclaim doesn't use
    current call graph is


    Actually, if zone_reclaim_mode=1, VM never call
    __alloc_pages_direct_reclaim in usual VM pressure.
    Thus I think zone-reclaim should be annotated explicitly too.
    I know almost user don't use zone reclaim mode. but explicit
    annotation doesn't have any demerit, I think.

    Am I missing anything?

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      Last update: 2010-01-02 06:23    [from the cache]
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