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| author | Nick Piggin <nickpiggin@yahoo.com.au> | 2005-06-25 14:57:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-25 16:24:44 -0700 |
| commit | 674311d5b411e9042df4fdf7aef0b3c8217b6240 (patch) | |
| tree | 4ee6b739629e7fc33b519fd087a116b4fa33a217 /kernel/fork.c | |
| parent | 3dbd5342074a1e570ec84edf859deb9be588006d (diff) | |
| download | op-kernel-dev-674311d5b411e9042df4fdf7aef0b3c8217b6240.zip op-kernel-dev-674311d5b411e9042df4fdf7aef0b3c8217b6240.tar.gz | |
[PATCH] sched: RCU domains
One of the problems with the multilevel balance-on-fork/exec is that it needs
to jump through hoops to satisfy sched-domain's locking semantics (that is,
you may traverse your own domain when not preemptable, and you may traverse
others' domains when holding their runqueue lock).
balance-on-exec had to potentially migrate between more than one CPU before
finding a final CPU to migrate to, and balance-on-fork needed to potentially
take multiple runqueue locks.
So bite the bullet and make sched-domains go completely RCU. This actually
simplifies the code quite a bit.
From: Ingo Molnar <mingo@elte.hu>
schedstats RCU fix, and a nice comment on for_each_domain, from Ingo.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/fork.c')
0 files changed, 0 insertions, 0 deletions
