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    SubjectRe: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413
    Le lundi 21 novembre 2011 à 18:35 +0100, Markus Trippelsdorf a écrit :

    > New one:


    I was just wondering if you were using CONFIG_CGROUPS=y, and if yes, if
    you could try to disable it.

    css_get_next() looks very buggy, the read_lock()/read_unlock() protects
    nothing at all, RCU rules are not respected.

    commit c1e2ee2dc43657 (memcg: replace ss->id_lock with a rwlock) missed
    the point of doing a true RCU conversion to get even better results, and
    fact that previous code was buggy as well.

    [ After rcu lookup, we must get a stable reference, then recheck the
    key , or else we can manipulate something that was queued for deletion.]

    An example of a correct RCU conversion was done in commit 8af088710d1
    (posix-timers: RCU conversion)

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      Last update: 2011-11-21 19:41    [W:0.019 / U:4.484 seconds]
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