Comment 217 for bug 131094

Changing to writeback mode is not harmful, however it did not help in my
case. I got improved performance but i still have stutters during I/O
activity, the more intense the lower response from the GUI

On Thu, May 14, 2009 at 04:23, cornbread <email address hidden> wrote:

> This is happening to me and I have a fresh install of jaunty x64. Is
> Paulo's solution working for others? Is it safe to try?
>
> I do a lot of large movie transfers. I didn't notice this issue in 8.10
> x64 but after 9.04 install performance during large transfer is
> unbearable. Reminds me of dialup days but for local transfers.
>
> --
> 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” source package in Ubuntu: Confirmed
> Status in “linux-source-2.6.22” source 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
>