Thanks, nick
On Fri, Nov 12, 2010 at 09:51, Arno Wagner <arno@xxxxxxxxxxx> wrote:
Id this is not a hard freeze, but only an extreme slowdown,
then it probably is one of the known issues with write-barrierss.
Fortunately, the kernel folks have finally stopped twiddeling
their thumbs and have started to do something about it.
The problem arises when writing a lot of data to a slower
device (among other things). The slowdown by the encryption
can be enough to trigger the issue. Also, doing something
like a "cat /dev/zero > ttt" tyically causes these freezes
that can take minutes or longer.
2.6.36 is alrady significantly improved, but contains
only part of the intended changes. 2.6.37 is expected
to be still better. I would recomend to try with
2.6.36 for the moment.
Arno
> _______________________________________________
On Fri, Nov 12, 2010 at 08:17:48AM -0700, Nicolas Bock wrote:
> Hello list,
>
> I am using 2 primary FAT partitions for swap that I encrypt with cryptsetup
> on boot with a random password from /dev/urandom. I noticed that once memory
> pressure is high enough for the pager to start swapping, the system freezes.
> It seems as if it's only the disk that freezes however, when I am logged
> into a virtual console I can still use the keyboard to switch between
> different consoles and the magic sysreq keys are working. I can ping the
> machine but that's about it. Anything that seems to involve disk access like
> logging in, Ctrl-C'ing the high memory job, switching to graphical console,
> etc, does not work. I have tried to increase kernel logging with 'dmesg -n8'
> but to no avail. I do not Âsee any error messages when this happens. I am
> using Âa vanilla kernel, version 2.6.34.5. Any pointers as to what could
> this be caused by or how I could track this down are greatly appreciated.
>
> nick
> dm-crypt mailing list
> dm-crypt@xxxxxxxx
> http://www.saout.de/mailman/listinfo/dm-crypt
--
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@xxxxxxxxxxx
GnuPG: ÂID: 1E25338F ÂFP: 0C30 5782 9D93 F785 E79C Â0296 797F 6B50 1E25 338F
----
Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
If it's in the news, don't worry about it. ÂThe very definition of
"news" is "something that hardly ever happens." -- Bruce Schneier
_______________________________________________
dm-crypt mailing list
dm-crypt@xxxxxxxx
http://www.saout.de/mailman/listinfo/dm-crypt
_______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
