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  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]
Date:	Mon, 16 Jul 2012 20:54:14 +0000 (UTC)
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 44731] ext4 deadlock under heavy io?

https://bugzilla.kernel.org/show_bug.cgi?id=44731





--- Comment #2 from Anssi Hannula <anssi.hannula@....fi>  2012-07-16 20:54:14 ---
Created an attachment (id=75501)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=75501)
sysrq-w output on 3.4.2 with frozen filesystem dm-4

I'm seeing a very similar issue on 3.4.2. I think this issue didn't exist
several major versions back.

When one or more applications do intensive I/O, the filesystem freezes and all
processes trying to access it freeze as well.

It doesn't always happen in the same way, though. Sometimes I get the "task
blocked for more than 120 seconds", but sometimes I don't (in the attached case
I didn't get those). Also, sometimes the system becomes usable again after
several minutes of being seemingly frozen, but often it doesn't recover (like
in the attached case). If wanted, I can provide more logs of these different
situations (the logs do look very similar than the ones on this report,
though).

In the attachment the frozen fs is dm-4. It is on the same LVM VG and RAID-6 as
dm-3, dm-5, dm-6, and those other filesystems continued to work while dm-4 was
frozen.

-- 
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists