Messages in this thread | | | Date | Tue, 4 Dec 2007 13:35:15 -0800 | From | Andrew Morton <> | Subject | Re: [Bug 9483] circular locking dependency detected |
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On Tue, 4 Dec 2007 22:25:18 +0100 Ingo Molnar <mingo@elte.hu> wrote:
> > * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> wrote: > > > ======================================================= > > [ INFO: possible circular locking dependency detected ] > > 2.6.24-rc3 #6 > > ------------------------------------------------------- > > bash/2294 is trying to acquire lock: > > (&journal->j_list_lock){--..}, at: [<c01eee2f>] journal_try_to_free_buffers+0x76/0x10c > > > > but task is already holding lock: > > (inode_lock){--..}, at: [<c01864b6>] drop_pagecache+0x48/0xd8 > > > > which lock already depends on the new lock. > > Andrew, drop_pagecache() is root-only and it has some known deadlock, > right? >
yup. It takes inode_lock at too high a level so it can walk the per-sb inode lists.
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