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authorSrivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>2007-10-15 11:00:12 -0400
committerIngo Molnar <mingo@elte.hu>2007-10-15 11:00:12 -0400
commitb9fa3df33f9166daf81bfa8253d339f5a7726122 (patch)
tree72e5c3b9ede48fbbb6c0dbbe94c123a4cb75f7a6 /kernel/sched.c
parentfad095a7b963d9e914e0cdb73e27355c47709441 (diff)
sched: group scheduler, fix latency
There is a possibility that because of task of a group moving from one cpu to another, it may gain more cpu time that desired. See http://marc.info/?l=linux-kernel&m=119073197730334 for details. This is an attempt to fix that problem. Basically it simulates dequeue of higher level entities as if they are going to sleep. Similarly it simulate wakeup of higher level entities as if they are waking up from sleep. Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/sched.c')
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