From: Alexander Beregalov <a.beregalov@gmail.com>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Reiserfs <reiserfs-devel@vger.kernel.org>
Subject: Re: [PATCH] kill-the-bkl/reiserfs: Fix induced mm->mmap_sem to sysfs_mutex dependency
Date: Tue, 29 Sep 2009 14:22:42 +0400 [thread overview]
Message-ID: <a4423d670909290322u4c1dd886tf55a2ea4a4a0977@mail.gmail.com> (raw)
In-Reply-To: <20090929074640.GA5233@nowhere>
2009/9/29 Frederic Weisbecker <fweisbec@gmail.com>:
> On Tue, Sep 22, 2009 at 05:55:43PM +0400, Alexander Beregalov wrote:
>> Hi Frederic.
>>
>> Another very similar warning.
>> (smp 2*2core)
>> v2.6.31-7068-g43c1266 plus 193be0ee1 kill-the-bkl/reiserfs: Fix
>> induced mm->mmap_sem to sysfs_mutex dependency
>>
>>
>> [ INFO: possible circular locking dependency detected ]
>> 2.6.31-07095-g25a3912 #4
>> -------------------------------------------------------
>> udevadm/790 is trying to acquire lock:
>> (&mm->mmap_sem){++++++}, at: [<c1098942>] might_fault+0x72/0xc0
>>
>> but task is already holding lock:
>> (sysfs_mutex){+.+.+.}, at: [<c110813c>] sysfs_readdir+0x7c/0x260
>>
>> which lock already depends on the new lock.
>
>
>
> Yeah indeed, it's about the same kind of thing.
> Could you please test the following patch?
Thanks, the warning has gone away.
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next prev parent reply other threads:[~2009-09-29 10:22 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-25 2:32 [PATCH 0/4] kill-the-bkl/reiserfs: fix some lock dependency inversions Frederic Weisbecker
2009-08-25 2:32 ` [PATCH 1/4] kill-the-bkl/reiserfs: fix "reiserfs lock" / "inode mutex" lock inversion dependency Frederic Weisbecker
2009-08-25 2:32 ` [PATCH 2/4] kill-the-bkl/reiserfs: fix recursive reiserfs lock in reiserfs_mkdir() Frederic Weisbecker
2009-08-25 2:32 ` [PATCH 3/4] kill-the-bkl/reiserfs: fix recursive reiserfs write lock in reiserfs_commit_write() Frederic Weisbecker
2009-08-25 2:32 ` [PATCH 4/4] kill-the-bkl/reiserfs: panic in case of lock imbalance Frederic Weisbecker
2009-08-26 20:13 ` [PATCH 0/4] kill-the-bkl/reiserfs: fix some lock dependency inversions Alexander Beregalov
2009-09-01 22:16 ` Frederic Weisbecker
2009-09-14 20:37 ` Frederic Weisbecker
2009-09-14 21:33 ` Alexander Beregalov
2009-09-14 21:50 ` Frederic Weisbecker
2009-09-16 20:37 ` Frederic Weisbecker
2009-09-16 23:37 ` Alexander Beregalov
2009-09-17 5:06 ` [PATCH] kill-the-bkl/reiserfs: Fix induced mm->mmap_sem to sysfs_mutex dependency Frederic Weisbecker
2009-09-22 13:55 ` Alexander Beregalov
2009-09-29 7:46 ` Frederic Weisbecker
2009-09-29 10:22 ` Alexander Beregalov [this message]
2009-10-05 18:12 ` [PATCH] kill-the-bkl/reiserfs: fix reiserfs lock to cpu_add_remove_lock dependency Frederic Weisbecker
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