revert ("sched: fair: weight calculations")
authorIngo Molnar <mingo@elte.hu>
Thu, 29 May 2008 09:23:17 +0000 (11:23 +0200)
committerIngo Molnar <mingo@elte.hu>
Thu, 29 May 2008 09:24:01 +0000 (11:24 +0200)
commitf9305d4a0968201b2818dbed0dc8cb0d4ee7aeb3
treee171e568f04bd25c7c2ff99b5ef673b917b6eae6
parentf26a3988917913b3d11b2bd741601a2c64ab9204
revert ("sched: fair: weight calculations")

Yanmin Zhang reported:

Comparing with kernel 2.6.25, sysbench+mysql(oltp, readonly) has many
regressions with 2.6.26-rc1:

 1) 8-core stoakley: 28%;
 2) 16-core tigerton: 20%;
 3) Itanium Montvale: 50%.

Bisect located this patch:

8f1bc385cfbab474db6c27b5af1e439614f3025c is first bad commit
| commit 8f1bc385cfbab474db6c27b5af1e439614f3025c
| Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
| Date:   Sat Apr 19 19:45:00 2008 +0200
|
|     sched: fair: weight calculations

Revert it to the 2.6.25 state.

Bisected-by: Yanmin Zhang <yanmin_zhang@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/sched.c
kernel/sched_fair.c