Bug 43781 - With 16GB RAM all Kernel versions >= 3.3 and < 3.5rc1 show performance loss, exceeding a factor of 10, when writing large (2G) files compared to 3.2
Summary: With 16GB RAM all Kernel versions >= 3.3 and < 3.5rc1 show performance loss, ...
Status: RESOLVED INVALID
Alias: None
Product: Memory Management
Classification: Unclassified
Component: Other (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Andrew Morton
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-06-25 19:15 UTC by Norman Back
Modified: 2013-12-23 16:25 UTC (History)
2 users (show)

See Also:
Kernel Version: 3.3
Subsystem:
Regression: Yes
Bisected commit-id:

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Description Norman Back 2012-06-25 19:15:39 UTC 
Posted upstream as requested by Gentoo maintainers. 
See https://bugs.gentoo.org/show_bug.cgi?id=421853 for details
Comment 1 Norman Back 2012-07-13 16:42:33 UTC 
https://lkml.org/lkml/2012/6/14/494 is a duplicate of this issue
Comment 2 Tom Wijsman 2012-11-09 21:53:14 UTC 
As mentioned downstroam, rewriting this patch (https://421853.bugs.gentoo.org/attachment.cgi?id=328986) fixes this. Although, I don't know whether this patch would be necessary in general for other users.
Comment 3 Alan 2013-12-23 16:25:08 UTC 
" Interestingly I needed to compile the nvidia driver and start X for the issue to present, even without the patch."
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