Messages in this thread | | | Date | Tue, 9 Dec 2008 09:37:06 +0530 | From | Vaidyanathan Srinivasan <> | Subject | Re: [BUG] idle_balance() does not call load_balance_newidle() |
| |
* Ingo Molnar <mingo@elte.hu> [2008-12-08 16:49:39]:
> > * Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> wrote: > > > Hi, > > > > load_balance_newidle() does not get called if SD_BALANCE_NEWIDLE is > > set at higher level domain (3-CPU) and not in low level domain (2-MC). > > > > pulled_task is initialised to -1 and checked for non-zero which is > > always true if the lowest level sched_domain does not have > > SD_BALANCE_NEWIDLE flag set. > > > > Trivial fix to initialise pulled_task to zero. > > Patch against 2.6.28-rc7 > > applied to tip/sched/core, thanks! (Not for v2.6.28 because this could > affect performance.)
Thanks Ingo. This patch does not change any functionality in v2.6.28 and hence will not affect performance. The SD flags are not touched. I found this bug while setting different SD flags at MC level and CPU level in my power saving balance patches.
--Vaidy
| |