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
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