Messages in this thread | | | Date | Tue, 07 Nov 2006 16:45:07 -0600 | From | Eric Sandeen <> | Subject | Re: [PATCH 2.6.19 5/5] fs: freeze_bdev with semaphore not mutex |
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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?
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