From: Eric Sandeen <sandeen@redhat.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Alasdair G Kergon <agk@redhat.com>,
linux-kernel@vger.kernel.org, dm-devel@redhat.com,
Ingo Molnar <mingo@elte.hu>, Srinivasa DS <srinivasa@in.ibm.com>
Subject: Re: [PATCH 2.6.19 5/5] fs: freeze_bdev with semaphore not mutex
Date: Tue, 07 Nov 2006 16:45:07 -0600 [thread overview]
Message-ID: <45510C73.7060408@redhat.com> (raw)
In-Reply-To: <20061107122837.54828e24.akpm@osdl.org>
Andrew Morton wrote:
>> --- linux-2.6.19-rc4.orig/fs/buffer.c 2006-11-07 17:06:20.000000000 +0000
>> +++ linux-2.6.19-rc4/fs/buffer.c 2006-11-07 17:26:04.000000000 +0000
>> @@ -188,7 +188,9 @@ struct super_block *freeze_bdev(struct b
>> {
>> struct super_block *sb;
>>
>> - mutex_lock(&bdev->bd_mount_mutex);
>> + if (down_trylock(&bdev->bd_mount_sem))
>> + return -EBUSY;
>> +
>
> This is a functional change which isn't described in the changelog. What's
> happening here?
Only allow one bdev-freezer in at a time, rather than queueing them up?
-Eric
next prev parent reply other threads:[~2006-11-07 22:45 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-07 18:34 [PATCH 2.6.19 5/5] fs: freeze_bdev with semaphore not mutex Alasdair G Kergon
2006-11-07 20:18 ` [dm-devel] " Mike Snitzer
2006-11-07 20:22 ` Eric Sandeen
2006-11-07 23:34 ` Alasdair G Kergon
2006-11-07 20:28 ` Andrew Morton
2006-11-07 22:45 ` Eric Sandeen [this message]
2006-11-07 23:00 ` Andrew Morton
2006-11-08 9:54 ` Arjan van de Ven
2007-01-12 6:23 ` Srinivasa Ds
2007-01-12 10:16 ` Srinivasa Ds
2006-11-07 23:05 ` Rafael J. Wysocki
2006-11-07 23:18 ` Eric Sandeen
2006-11-07 23:42 ` Rafael J. Wysocki
2006-11-08 0:01 ` Alasdair G Kergon
2006-11-08 8:27 ` David Chinner
2006-11-08 14:25 ` Alasdair G Kergon
2006-11-08 14:43 ` Rafael J. Wysocki
2006-11-08 15:25 ` Alasdair G Kergon
2006-11-08 23:06 ` Rafael J. Wysocki
2006-11-07 23:49 ` Alasdair G Kergon
2006-11-08 0:00 ` Rafael J. Wysocki
2006-11-08 3:33 ` David Chinner
2006-11-08 2:30 ` Alasdair G Kergon
2006-11-08 12:10 ` Rafael J. Wysocki
2006-11-08 18:09 ` Pavel Machek
2006-11-09 15:52 ` Rafael J. Wysocki
2006-11-09 16:00 ` Pavel Machek
2006-11-09 19:59 ` Rafael J. Wysocki
2006-11-09 21:17 ` Pavel Machek
2006-11-09 21:18 ` Rafael J. Wysocki
2006-11-09 21:41 ` Pavel Machek
2006-11-09 22:21 ` Rafael J. Wysocki
2006-11-09 23:11 ` Pavel Machek
2006-11-09 23:24 ` Alasdair G Kergon
2006-11-09 23:32 ` Pavel Machek
2006-11-10 12:03 ` Rafael J. Wysocki
2006-11-12 18:43 ` Pavel Machek
2006-11-12 21:53 ` Rafael J. Wysocki
2006-11-12 23:30 ` David Chinner
2006-11-13 16:11 ` Rafael J. Wysocki
2006-11-15 18:50 ` Pavel Machek
2006-11-15 19:56 ` Rafael J. Wysocki
2006-11-15 20:00 ` Rafael J. Wysocki
2006-11-15 20:23 ` Pavel Machek
2006-11-15 21:58 ` Rafael J. Wysocki
2006-11-15 22:49 ` Pavel Machek
2006-11-16 23:20 ` David Chinner
2006-11-16 23:38 ` Pavel Machek
2006-11-13 7:35 ` Stefan Seyfried
2006-11-10 0:57 ` David Chinner
2006-11-10 10:39 ` Pavel Machek
2006-11-12 22:30 ` David Chinner
2006-11-12 22:43 ` Rafael J. Wysocki
2006-11-13 5:43 ` David Chinner
2006-11-13 16:22 ` Rafael J. Wysocki
2006-11-14 0:10 ` David Chinner
2006-11-16 23:23 ` David Chinner
2006-11-16 23:40 ` Pavel Machek
2006-11-17 1:40 ` David Chinner
2006-11-17 15:13 ` Pavel Machek
2006-11-10 0:54 ` David Chinner
2006-11-10 10:24 ` Alan Cox
2006-11-10 10:36 ` Pavel Machek
2006-11-10 0:33 ` David Chinner
2006-11-10 10:38 ` Pavel Machek
2006-11-08 20:48 ` Nigel Cunningham
2006-11-08 21:08 ` Rafael J. Wysocki
2006-11-07 23:23 ` Alasdair G Kergon
2006-11-07 23:39 ` Ingo Molnar
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