On 05/03/2012 08:53 AM, Josef Bacik wrote:
On Thu, May 03, 2012 at 08:43:32AM -0600, Jim Schutt wrote:
On 05/01/2012 10:41 AM, Jim Schutt wrote:
On 05/01/2012 10:00 AM, Josef Bacik wrote:
On Wed, Apr 11, 2012 at 02:24:30PM -0600, Jim Schutt wrote:
On 04/11/2012 01:09 PM, Josef Bacik wrote:
On Tue, Apr 10, 2012 at 01:39:14PM -0600, Jim Schutt wrote:
Hi,
I hit this BUG today.
I'm running 3.3.1 merged with the ceph and btrfs bits for 3.4,
i.e. 3.3.1 +
commit bc3f116fec194 "Btrfs: update the checks for mixed block groups with big
metadata blocks"
commit c666601a935b9 "rbd: move snap_rwsem to the device, rename to
header_rwsem"
The btrfs filesystem in question is backing a Ceph OSD under
a heavy write load.
Here's the bug:
Can you give this a whirl and let me know how it goes? If I'm right you should
see a warning pop up in your messages. Thanks,
OK, I've got my test running with your patch applied
to my previous kernel.
Do you expect your warning to only fire when my
previous kernel would have BUGged? I ask because I've
only seen the BUG once, so it may be a low-probability
occurrence.
It seems like I should keep testing until I see either
your new warning or the BUG, right?
Hey Jim,
I just sent a patch to the list
[PATCH] Btrfs: fix page leak when allocing extent buffers
Could you try that and see if you can reproduce your problem?
Taking it for a spin now...
Hit it again:
Argh ok it's time to stop hopping around the problem and see what exactly the
state is when this happens so I know where to look. Can you run with this patch
and give me the dmesg? The important information will be above the --- cut here
--- line so make sure to grab that part. Thanks,
Working on it...
BTW, when I recompiled, I noticed this warning:
CC [M] fs/btrfs/extent_io.o
fs/btrfs/extent_io.c: In function ‘write_one_eb’:
fs/btrfs/extent_io.c:3195: warning: ‘ret’ may be used uninitialized in this
function
Is there ever any chance at all that write_one_eb() can be
called by mistake for an eb with zero pages? If so, could
that be part of the problem?
-- Jim
Josef
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