From: Pekka Enberg <penberg@kernel.org>
To: Yong Zhang <yong.zhang0@gmail.com>
Cc: Shaohua Li <shaohua.li@intel.com>,
Christoph Lameter <cl@linux.com>,
Julie Sullivan <kernelmail.jms@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: INFO: possible recursive locking detected: get_partial_node() on 3.2-rc1
Date: Tue, 15 Nov 2011 20:49:35 +0200 (EET) [thread overview]
Message-ID: <alpine.LFD.2.02.1111152049210.1888@tux.localdomain> (raw)
In-Reply-To: <20111115072251.GA10389@zhy>
On Tue, 15 Nov 2011, Yong Zhang wrote:
>> Subject: slub: move discard_slab out of node lock
>>
>> Lockdep reports there is potential deadlock for slub node list_lock.
>> discard_slab() is called with the lock hold in unfreeze_partials(),
>> which could trigger a slab allocation, which could hold the lock again.
>>
>> discard_slab() doesn't need hold the lock actually, if the slab is
>> already removed from partial list.
>>
>> Reported-and-tested-by: Yong Zhang <yong.zhang0@gmail.com>
>> Reported-and-tested-by: Julie Sullivan <kernelmail.jms@gmail.com>
>> Signed-off-by: Shaohua Li <shaohua.li@intel.com>
>
> Tested-by: Yong Zhang <yong.zhang0@gmail.com>
Applied, thanks!
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next prev parent reply other threads:[~2011-11-15 18:49 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20111109090556.GA5949@zhy>
2011-11-10 23:35 ` INFO: possible recursive locking detected: get_partial_node() on 3.2-rc1 Julie Sullivan
2011-11-11 3:04 ` Shaohua Li
2011-11-11 4:42 ` Yong Zhang
2011-11-11 14:57 ` Christoph Lameter
2011-11-11 15:02 ` Christoph Lameter
2011-11-11 19:09 ` Julie Sullivan
2011-11-11 19:22 ` Paul E. McKenney
2011-11-14 5:34 ` Shaohua Li
2011-11-15 7:22 ` Yong Zhang
2011-11-15 18:49 ` Pekka Enberg [this message]
2011-11-15 16:02 ` Christoph Lameter
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