Re: regression: 100% io-wait with 2.6.24-rcX

[Joerg Platte]

Am Mittwoch, 9. Januar 2008 schrieb Fengguang Wu:
> On Wed, Jan 09, 2008 at 01:22:33PM +0100, Joerg Platte wrote:
> > Am Mittwoch, 9. Januar 2008 schrieb Fengguang Wu:
> >
> > Thank your for the hint with the filesystems!
> >
> > > Thank you for the clue. However I cannot reproduce the bug on
> > > ext2/2.6.24-rc7. Can you provide more details? Thank you.
> >
> > I attached some more information. I'm using the ata_piix driver for my
> > PATA disk and cdrom drive and booted with hpet=force. Kernel 2.6.23.X has
> > been
>
>                                                           ~~~~~~~~
> 							  not 2.6.24-rc7?
>
No, 2.6.23.X was the last working kernel without this problem, the bug shows 
up with 2.6.24-rcX. I just wanted to emphasis, that I don't think that it has 
something to do with the hpet stuff. Kernel 2.6.24-rcX is unpatched, because 
the hrt stuff has been merged.

> > patched with the -hrt patches to enable the hidden hpet time on the
> > ICH4-M chipset. I just rebooted the notebook and mounted /tmp again as
> > ext2 and now the iowait problem is back. Seems to be reproducible on my
> > computer. What additional information do you need?
>
> I mounted an ext2 as tmp and find no problem. My config options are:
>
> CONFIG_EXT2_FS=y
> CONFIG_EXT2_FS_XATTR=y
> CONFIG_EXT2_FS_POSIX_ACL=y
> CONFIG_EXT2_FS_SECURITY=y
> # CONFIG_EXT2_FS_XIP is not set
>
> Fengguang

CONFIG_EXT2_FS=m
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
CONFIG_EXT2_FS_XIP=y

Here it is modular and I enabled CONFIG_EXT2_FS_XIP, but the same is enabled 
on 2.6.23.X. Maybe it is related to libata? I additionally discovered, that 
the problem disappears for a few seconds when I press the eject button for 
the ultra bay of my thinkpad. Pressing the button unregisters the cdrom drive 
to be able to replace it with a hard drive or a battery. Maybe this bug is 
thinkpad relared?

regards,
Jörg

-- 
PGP Key: send mail with subject 'SEND PGP-KEY' PGP Key-ID: FD 4E 21 1D
PGP Fingerprint: 388A872AFC5649D3 BCEC65778BE0C605

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/