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Date:	Tue, 6 Nov 2007 16:00:06 +0800
From:	Fengguang Wu <>
To:	David <>
Cc:	Linux Kernel Mailing List <>
Subject: Re: 2.6.24-rc1 - Regularly getting processes stuck in D state on

On Mon, Nov 05, 2007 at 06:23:07PM +0000, David wrote:
> I've been testing rc1 for a week or so, and about 25% of the time I'm
> seeing Firefox and Thunderbird getting stuck in 'D' state as they startup.
> I've attached the output of Sysrq-T to this mail... system is a
> dual-core AMD64, and files are on a RAID-1 root partition connected two
> SATA disks on the on-board NVidia controller. I've had no problems
> before .24 rc1

David, thank you for the reporting.

Could you try with the attached 4 patches? Two of them are expected to
fix your problem, another two are debugging ones(in case the problem

Thank you,

View attachment "reiserfs-writeback-fix.patch" of type "text/x-diff" (3264 bytes)

View attachment "mm-speed-up-writeback-ramp-up-on-clean-systems.patch" of type "text/x-diff" (1827 bytes)

View attachment "writeback-debug.patch" of type "text/x-diff" (1926 bytes)

View attachment "requeue_io-debug.patch" of type "text/x-diff" (1141 bytes)

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