linux-kernel - Re: [dm-devel] Re: 2.6.24 Kernel Soft Lock Up with heavy I/O in dm-crypt

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Date:	Thu, 6 Mar 2008 20:11:38 +0530
From:	Ritesh Raj Sarraf <rrs@...earchut.com>
To:	Milan Broz <mbroz@...hat.com>
Cc:	device-mapper development <dm-devel@...hat.com>,
	Herbert Xu <herbert@...dor.apana.org.au>, dm-crypt@...ut.de,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	Alasdair G Kergon <agk@...hat.com>,
	Christophe Saout <christophe@...ut.de>
Subject: Re: [dm-devel] Re: 2.6.24 Kernel Soft Lock Up with heavy I/O in	dm-crypt

I have a problem now.
I'm not able to reproduce the bug on an IBM xSeries box.

CPU: Dual Core 3.8 Ghz
RAM: 1 GB

The big difference in the configuration is that the laptop read data from a 
USB HDD and copied it to another USB HDD (dm-crypted)
The IBM box reads it from an NFS share and copies it to the local hdd 
(dm-crypted)

Ritesh


On Sunday 02 March 2008, Milan Broz wrote:
> (the same patch for 2.6.24)
>
> Milan
> --
> Add cond_resched() to prevent stuck in big bio processing.
>
> Signed-off-by: Milan Broz <mbroz@...hat.com>
> ---
>  drivers/md/dm-crypt.c |    1 +
>  1 file changed, 1 insertion(+)
>
> Index: linux-2.6.24.3/drivers/md/dm-crypt.c
> ===================================================================
> --- linux-2.6.24.3.orig/drivers/md/dm-crypt.c	2008-02-26 01:20:20.000000000
> +0100 +++ linux-2.6.24.3/drivers/md/dm-crypt.c	2008-03-01
> 16:46:24.000000000 +0100 @@ -374,6 +374,7 @@ static int
> crypt_convert(struct crypt_co
>  			break;
>
>  		ctx->sector++;
> +		cond_resched();
>  	}
>
>  	return r;



-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."

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