Kernel Bug Tracker – Bug 27842
[regression?] hang with 2.6.37 on a BTRFS test machine
Last modified: 2011-03-29 20:41:14 UTC
Subject : [regression?] hang with 2.6.37 on a BTRFS test machine
Submitter : Martin Steigerwald <Martin@lichtvoll.de>
Date : 2011-01-23 12:06
Message-ID : 201101231306.23069.Martin@lichtvoll.de
References : http://marc.info/?l=linux-kernel&m=129578445613283&w=2
This entry is being used for tracking a regression from 2.6.36. Please don't
close it until the problem is fixed in the mainline.
Added linux-btrfs and Helmut Hullen, who seemed to experience hangs on a T23 with BTRFS as well, to Cc.
Am Thursday 03 February 2011 schrieb Rafael J. Wysocki:
> This message has been generated automatically as a part of a report
> of regressions introduced between 2.6.36 and 2.6.37.
> The following bug entry is on the current list of known regressions
> introduced between 2.6.36 and 2.6.37. Please verify if it still should
> be listed and let the tracking team know (either way).
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=27842
> Subject : [regression?] hang with 2.6.37 on a BTRFS test machine
> Submitter : Martin Steigerwald <Martin@lichtvoll.de>
> Date : 2011-01-23 12:06 (11 days old)
> Message-ID : <201101231306.23069.Martin@lichtvoll.de>
> References : http://marc.info/?l=linux-kernel&m=129578445613283&w=2
Well I now tested with 2.6.36 for more than a week and I did not see any of such hangs upto now. The machine seems table with 2.6.36. So I think its really an regression of 2.6.37.
I am stuck with what to try next. Since trying to track it down to a specific commit appears too involved for me and its appears also quite laborious to get any value debug information out of the kernel - cause it can take days for the bug to appear -, I am inclined to either test with 220.127.116.11 once its available or just give it a go with 2.6.38-rc3 or rc4. Maybe 2.6.38-rc3/4 would be the best bet, I have seen a report on the btrfs mailing list of 2.6.38 fixing a BTRFS hang bug that appeared with 2.6.37. I am just not sure whether its related or not.
Re: [PATCH v2]Btrfs: pwrite blocked when writing from the mmaped buffer of the same page
There is another thread about 2.6.37 related BTRFS hang:
flush-btrfs-1 hangs when building openwrt
I will add this as comment to the bug report as well.
Could bug#27132 be related?
Could #29952 be related to this bug?
Dunno. But I didn't see this bug with 2.6.38 and 18.104.22.168 so far. Please close - I do not have the access rights to do it. Raphael recommends closing as "irreproducible" in that case, cause its not really clear that it has been fixed when its irreproducible in a newer version.