| commit | 01c8c57d668d94f1036d9ab11a22aa24ca16a35d | |
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | |
| Fri, 24 Oct 2008 09:06:12 +0000 (24 11:06 +0200) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Fri, 24 Oct 2008 10:50:59 +0000 (24 12:50 +0200) | ||
| tree | a5bad4df146982e55bdd9dba73912f6bace036df | treesnapshot (tar.gz zip) |
| parent | 8c82a17e9c924c0e9f13e75e4c2f6bca19a4b516 | commitdiff |
sched: fix a find_busiest_group buglet
In one of the group load balancer patches:
commit 408ed066b11cf9ee4536573b4269ee3613bd735e
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Fri Jun 27 13:41:28 2008 +0200
Subject: sched: hierarchical load vs find_busiest_group
The following change:
- if (max_load - this_load + SCHED_LOAD_SCALE_FUZZ >=
+ if (max_load - this_load + 2*busiest_load_per_task >=
busiest_load_per_task * imbn) {
made the condition always true, because imbn is [1,2].
Therefore, remove the 2*, and give the it a fair chance.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
In one of the group load balancer patches:
commit 408ed066b11cf9ee4536573b4269ee3613bd735e
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Fri Jun 27 13:41:28 2008 +0200
Subject: sched: hierarchical load vs find_busiest_group
The following change:
- if (max_load - this_load + SCHED_LOAD_SCALE_FUZZ >=
+ if (max_load - this_load + 2*busiest_load_per_task >=
busiest_load_per_task * imbn) {
made the condition always true, because imbn is [1,2].
Therefore, remove the 2*, and give the it a fair chance.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| kernel/sched.c | diffblobblamehistory |