Date: Sat, 1 Mar 2008 02:15:51 +0800
From: Herbert Xu <herbert@gondor.apana.org.au>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Ritesh Raj Sarraf <rrs@researchut.com>,
       Christophe Saout <christophe@saout.de>, linux-kernel@vger.kernel.org,
       dm-devel@redhat.com
Subject: Re: 2.6.24 Kernel Soft Lock Up with heavy I/O in dm-crypt
Message-ID: <20080229181551.GA28193@gondor.apana.org.au>
References: <200802281924.03996.rrs@researchut.com> <20080228232048.51e28c1d.akpm@linux-foundation.org>
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On Thu, Feb 28, 2008 at 11:20:48PM -0800, Andrew Morton wrote:
>
> Now, I'm assuming that it's just unreasonable for a machine to spend a full
> 11 seconds crunching away on crypto in that code path.  Maybe it _is_
> reasonable, and all we need to do is to poke a cond_resched() in there
> somewhere.  Herbert, any thoughts?  What's the speed of that code?

It encryps 512 bytes each time so it should definitely be pretty
quick.  Perhaps the caller is disabling interrupts or something?

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
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