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Date: Mon, 12 Dec 2011 12:53:45 -0600 (CST)
From: Christoph Lameter <cl@...ux.com>
To: Eric Dumazet <eric.dumazet@...il.com>
cc: zhihua che <zhihua.che@...il.com>, linux-kernel@...r.kernel.org,
Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [Slub allocator] There are chances that kmem_cache_cpu->freelist
gets lost if the process happens to be rescheduled to a differenet cpu before
the local_irq_save() completes in __slab_alloc()
On Mon, 12 Dec 2011, Eric Dumazet wrote:
> Indeed, I reproduced the leak with hackbench and lot of threads.
Ran it here and did not see anything. But obviously this is an issue.
Strange that no one noticed earlier. Usage of CONFIG_PREEMPT must not be
that frequent.
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