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    SubjectRe: kswapd craziness in 3.7
    Dne 4.12.2012 10:05, Zdenek Kabelac napsal(a):
    > Dne 3.12.2012 20:18, Johannes Weiner napsal(a):
    >> Szia Zdenek,
    >>
    >> On Mon, Dec 03, 2012 at 04:23:15PM +0100, Zdenek Kabelac wrote:
    >>> Ok, bad news - I've been hit by kswapd0 loop again -
    >>> my kernel git commit cc19528bd3084c3c2d870b31a3578da8c69952f3 again
    >>> shown kswapd0 for couple minutes on CPU.
    >>>
    >>> It seemed to go instantly away when I've drop caches
    >>> (echo 3 >/proc/sys/vm/drop_cache)
    >>> (After that I've had over 1G free memory)
    >>
    >> Any chance you could retry with this patch on top?
    >>
    >> ---
    >> From: Johannes Weiner <hannes@cmpxchg.org>
    >> Subject: [patch] mm: vmscan: do not keep kswapd looping forever due
    >> to individual uncompactable zones
    >>
    >> ---
    >> mm/vmscan.c | 16 ----------------
    >> 1 file changed, 16 deletions(-)
    >>
    >> diff --git a/mm/vmscan.c b/mm/vmscan.c
    >
    >
    > Ok, I'm running now b69f0859dc8e633c5d8c06845811588fe17e68b3 (-rc8)
    > with your patch. I'll be able to give some feedback after couple
    > days (if I keep my machine running without reboot - since before

    So to just give some positive info -

    with 2 1/2 day uptime, several suspend/resumes, ff at 1.4GB
    I still have just 29 seconds for kswapd0 process.

    So the patch above might have helped - but I'll look for a few more days.

    Zdenek


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