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[Bug 131094] [NEW] Heavy Disk I/O harms desktop responsiveness

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <131094@xxxxxxxxxxxxxxxxxx>
Date: Thu, 12 Mar 2015 23:35:10 -0000
Reply-to: Bug 131094 <131094@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

You have been subscribed to a public bug:

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

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: cft-2.6.27
-- 
Heavy Disk I/O harms desktop responsiveness
https://bugs.launchpad.net/bugs/131094
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