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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2006-10-04 11:17:17 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-04 16:55:31 +0200 |
| commit | 20e9751bd9dd6b832fd84ada27840360f7e877f1 (patch) | |
| tree | c598ff9cb9e540da7f8595f2c130f3674065e018 /scripts/gcc-x86_64-has-stack-protector.sh | |
| parent | [PATCH] rcu: add sched torture type to rcutorture (diff) | |
| download | linux-20e9751bd9dd6b832fd84ada27840360f7e877f1.tar.xz linux-20e9751bd9dd6b832fd84ada27840360f7e877f1.zip | |
[PATCH] rcu: simplify/improve batch tuning
Kill a hard-to-calculate 'rsinterval' boot parameter and per-cpu
rcu_data.last_rs_qlen. Instead, it adds adds a flag rcu_ctrlblk.signaled,
which records the fact that one of CPUs has sent a resched IPI since the
last rcu_start_batch().
Roughly speaking, we need two rcu_start_batch()s in order to move callbacks
from ->nxtlist to ->donelist. This means that when ->qlen exceeds qhimark
and continues to grow, we should send a resched IPI, and then do it again
after we gone through a quiescent state.
On the other hand, if it was already sent, we don't need to do it again
when another CPU detects overflow of the queue.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Paul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'scripts/gcc-x86_64-has-stack-protector.sh')
0 files changed, 0 insertions, 0 deletions