Bug 10638

Summary:	sysbench+mysql(oltp, readonly) 30% regression with 2.6.26-rc1
Product:	Process Management	Reporter:	Rafael J. Wysocki (rjw)
Component:	Scheduler	Assignee:	Ingo Molnar (mingo)
Status:	CLOSED CODE_FIX
Severity:	normal	CC:	a.p.zijlstra, dhaval
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.26-rc1	Subsystem:
Regression:	Yes	Bisected commit-id:
Bug Depends on:
Bug Blocks:	10492

Description Rafael J. Wysocki 2008-05-08 13:51:37 UTC

Subject    : sysbench+mysql(oltp, readonly) 30% regression with 2.6.26-rc1
Submitter  : "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
Date       : 2008-05-07 4:55
References : http://marc.info/?l=linux-kernel&m=121013681527052&w=2
Handled-By : Ingo Molnar <mingo@elte.hu>
Patch      : http://marc.info/?l=linux-kernel&m=121015292616802&w=2

This entry is being used for tracking a regression from 2.6.25.  Please don't
close it until the problem is fixed in the mainline.

Comment 1 Rafael J. Wysocki 2008-05-08 13:52:44 UTC

Caused by:

commit 8f1bc385cfbab474db6c27b5af1e439614f3025c
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date:   Sat Apr 19 19:45:00 2008 +0200

    sched: fair: weight calculations

    Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>

Comment 2 Rafael J. Wysocki 2008-05-20 15:10:24 UTC

Regressions list annotation:
Handled-By : Peter Zijlstra <peterz@infradead.org>
References : http://lkml.org/lkml/2008/5/18/177

Comment 3 Rafael J. Wysocki 2008-06-05 14:36:11 UTC

Confirmed to be fixed in the Linus' tree.
References : http://lkml.org/lkml/2008/6/2/10