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Date: Tue, 16 Oct 2007 02:01:59 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: Alexey Dobriyan <adobriyan@...ru> Cc: linux-kernel@...r.kernel.org, a.p.zijlstra@...llo.nl, mingo@...e.hu Subject: Re: Possible circular locking: ->mmap_sem vs jbd_handle On Tue, 16 Oct 2007 12:54:29 +0400 Alexey Dobriyan <adobriyan@...ru> wrote: > Got this during LTP's diotest1. Reproducable. > > ======================================================= > [ INFO: possible circular locking dependency detected ] > 2.6.23-65a6ec0d72a07f16719e9b7a96e1c4bae044b591 #2 > ------------------------------------------------------- > diotest1/13563 is trying to acquire lock: > (&mm->mmap_sem){----}, at: [<c107a7b7>] dio_get_page+0x4b/0x16b > > but task is already holding lock: > (jbd_handle){--..}, at: [<c1099b05>] journal_start+0xf3/0x120 > > which lock already depends on the new lock. Someone taught lockdep about journal_start? That's gonna hurt. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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