Comment 338 for bug 131094

I've tried a version of maverick kernel ported to Lucid, version
2.6.35-14.20~lucid2. It was supposed
to clear the problem but nop. I still have issues everytime I have
moderate to high I/O on the filesystem.

Tomorrow I will try another filesystem than ext4.

O. Gagnon

On Wed, Aug 18, 2010 at 1:56 AM, Brian Rogers <email address hidden> wrote:
> I've set up a PPA here: https://launchpad.net/~brian-rogers/+archive/io-
> kernel
>
> A Maverick kernel is building right now. The patch didn't cleanly apply
> to Lucid's kernel. Is there a version of the patch that's already been
> backported to 2.6.32?
>
> --
> Heavy Disk I/O harms desktop responsiveness
> https://bugs.launchpad.net/bugs/131094
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in The Linux Kernel: Invalid
> Status in “linux” package in Ubuntu: Confirmed
> Status in “linux-source-2.6.22” package in Ubuntu: Won't Fix
>
> Bug description:
> Binary package hint: linux-source-2.6.22
>
> When compared with 2.6.15 in feisty, heavy disk I/O causes increased iowait times and affects desktop responsiveness in 2.6.22
>
> this appears to be a regression from 2.6.15 where iowait is much lower and desktop responsiveness is unaffected with the same I/O load
>
> Easy to reproduce with tracker - index the same set of files with 2.6.15 kernel and 2.6.22 kernel and the difference in desktop responsiveness is massive
>
> I have not confirmed if a non-tracker process which does heavy disk i/o (especially writing) replicates this yet - will do further investigation soon
>
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