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    SubjectRe: 2.6.39-rc4+: Kernel leaking memory during FS scanning, regression?
    On Wed, Apr 27, 2011 at 10:40:23PM +0200, Bruno Prémont wrote:
    > On Wed, 27 April 2011 Bruno Prémont wrote:
    > > On Wed, 27 April 2011 Bruno Prémont wrote:
    > > > On Wed, 27 Apr 2011 00:28:37 +0200 (CEST) Thomas Gleixner wrote:
    > > > > Also please apply the patch below and check, whether the printk shows
    > > > > up in your dmesg.
    > > >
    > > > > Index: linux-2.6-tip/kernel/sched_rt.c
    > > > > ===================================================================
    > > > > --- linux-2.6-tip.orig/kernel/sched_rt.c
    > > > > +++ linux-2.6-tip/kernel/sched_rt.c
    > > > > @@ -609,6 +609,7 @@ static int sched_rt_runtime_exceeded(str
    > > > >
    > > > > if (rt_rq->rt_time > runtime) {
    > > > > rt_rq->rt_throttled = 1;
    > > > > + printk_once(KERN_WARNING "sched: RT throttling activated\n");
    > >
    > > This gun is triggering right before RCU-managed slabs start piling up as
    > > visible under slabtop so chances are it's at least a related!
    >
    > Letting the machine idle (except running collectd and slabtop) scheduler
    > suddenly decided to restart giving rcu_kthread CPU cycles (after two hours
    > or so! if I read my statistics graphs correctly)

    And this also returned the slab memory, right?

    Two hours is quite some time...

    Thanx, Paul

    > While looking at lkml during the above 2 hours I stumbled across this (the
    > patch of which doesn't help in my case) which looked possibly related.
    > http://thread.gmane.org/gmane.linux.kernel/1129614
    >
    > Bruno
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