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SubjectRe: 2.5.59-mm5 hangs on boot
Tom Sightler <ttsig@tuxyturvy.com> wrote:
>
> I was interested in testing the new IO scheduler in 2.5.59-mm5 because
> it attempts to correct a problem that has always bothered me

Yup.

> but with
> this kernel (using the identical config to -mm2) my system hangs almost
> immediately after boot.

Several people are reporting this. We seem to have lost a disk request or
such.

First up, please see if changing this:

static int antic_expire = HZ / 25;

to

static int antic_expire = 0;

in drivers/block/deadline-iosched.c fixes it up.


If not then please confirm that

http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.59/2.5.59-luuk/2.5.59-luuk.gz

still causes the problem.

If so then I'd really appreciate it if you could work through the individual
patches in

http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.59/2.5.59-luuk/broken-out/

and find out which one is causing the problem. The patch application order is

vmlinux-fix.patch
deadline-np-42.patch
deadline-np-43.patch
reiserfs-readpages.patch
ext3-scheduling-storm.patch
auto-unplug.patch
less-unplugging.patch
kirq.patch
kirq-up-fix.patch
ext3-truncate-ordered-pages.patch
vma-file-merge.patch
quota-lockfix.patch
quota-offsem.patch
dont-wait-on-inode.patch

Thanks.
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