From: Heinz Diehl <htd@fancy-poultry.org>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] [BUG] bad performance and system stalls when using dm-crypt
Date: Sun, 12 Sep 2010 11:04:20 +0200 [thread overview]
Message-ID: <20100912090420.GA4674@fancy-poultry.org> (raw)
In-Reply-To: <AANLkTikLSFFpbgX+rBR5banBygmB6rRvzMBYKfPcFPuJ@mail.gmail.com>
On 12.09.2010, dave b wrote:
> Should I forward my 'bug' to the linux kernel maliing list ?
I'm not shure at all what causes the behaviour you encounter, there is
the device-mapper, the crypto layer, the disk scheduler and a lot more
which could be more or less related.
There was a similar monster thread some months ago on latency issues
(which was not crypto related!), Linus did a "yum update" in the
background while reading mail with Alpine and encountered some severe
stalls. A lot of work has been put into cfq afterwards, and latency is a
still ongoing issue in the Linux kernel and on the lkml (see the patch
from M. Desnoyers which came up today regarding sched granularity).
In a nutshell: I don't know :-)
next prev parent reply other threads:[~2010-09-12 9:04 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-11 6:06 [dm-crypt] [BUG] bad performance and system stalls when using dm-crypt dave b
2010-09-11 6:57 ` Heinz Diehl
2010-09-11 8:11 ` dave b
2010-09-11 9:02 ` dave b
2010-09-11 9:08 ` dave b
2010-09-12 8:36 ` dave b
2010-09-12 9:04 ` Heinz Diehl [this message]
2010-09-12 9:07 ` Milan Broz
2010-09-12 10:42 ` dave b
2010-09-12 10:45 ` dave b
2010-10-06 17:58 ` dave b
2010-10-24 15:32 ` Fwd: " dave b
2010-10-24 16:31 ` Milan Broz
2010-10-24 16:52 ` dave b
2010-10-24 17:05 ` Milan Broz
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