linux-kernel - Re: 2.6.38.x: system hangs, iowait ~75, no resource-hogs, no logs

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 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <4DA4D43F.1080205@gmx.de>
Date:	Wed, 13 Apr 2011 00:37:51 +0200
From:	Thomas Sattler <tsattler@....de>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
CC:	Kelly Anderson <kelly@...ka.with-linux.com>
Subject: Re: 2.6.38.x: system hangs, iowait ~75, no resource-hogs, no logs

On 04/08/11 01:14, Kelly Anderson wrote:
> Try the patch found in "Linux 2.6.38 freeze because of 
> sound/core/pcm_lib.c commit"

I applied https://lkml.org/lkml/diff/2011/4/1/69/1 but that
did not (completely?) solve my problem:

While running firefox (>50 open Tabs), khugepaged suddenly
run at 99.99% IO (according to 'iotop'). X became unusable
within seconds, but the system itself was still running.

I was able to switch to tty1 where everything was quite
normal, except khugepaged beeing constantly above 90%.
Switching back to X showed a frozen windowmanager with
empty windows. Back to tty1 I was able to kill X and
start a new X session, which behaved as usual.

khugepaged kept the system busy for another 10min so I
rebooted the machine. (This time there was no problem
running 'pkill' and 'iotop' several times.)

My current kernel is configured like this:

$ zgrep HUGE /proc/config.gz
CONFIG_TRANSPARENT_HUGEPAGE=y
CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y
# CONFIG_TRANSPARENT_HUGEPAGE_MADVISE is not set
# CONFIG_HUGETLBFS is not set
# CONFIG_HUGETLB_PAGE is not set

** Please CC: me, as I'm not on the list. **

Thomas
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/