linux-kernel - Re: [PATCH 2.6.19 5/5] fs: freeze

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <45510C73.7060408@redhat.com>
Date:	Tue, 07 Nov 2006 16:45:07 -0600
From:	Eric Sandeen <sandeen@...hat.com>
To:	Andrew Morton <akpm@...l.org>
CC:	Alasdair G Kergon <agk@...hat.com>, linux-kernel@...r.kernel.org,
	dm-devel@...hat.com, Ingo Molnar <mingo@...e.hu>,
	Srinivasa DS <srinivasa@...ibm.com>
Subject: Re: [PATCH 2.6.19 5/5] fs: freeze_bdev with semaphore not mutex

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
-
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/