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

[Thomas Pi]

I have tried the two block_write_full_page patches with ext4, but still
no improvement.

The only "working" patch is the "mm fix page writeback accounting to fix
oom condition under heavy I/O" from Mathieu Desnoyers, which does not
fix the problem, but makes it sufferable for me.

I am currently using the 2.6.29 kernel, in which (a part of) the fsync bug was fixed. At least Firefox works smooth for me, without any interruption. 
(see SQLite-Test at http://global.phoronix-test-suite.com/?k=profile&u=ebird-3722-22013-9288 )
I think it's the 78f707bfc723552e8309b7c38a8d0cc51012e813 commit, as it reverts a parts from 2.6.26 commit 18ce3751ccd488c78d3827e9f6bf54e6322676fb and it fits with my benchmark results.
(see 2.6.29 Changelog http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.29 )

It should be reverted in the Ubuntu 9.04 kernel too.

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Heavy Disk I/O harms desktop responsiveness
https://bugs.launchpad.net/bugs/131094
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