Re: [patch] voluntary-preempt-2.6.8-rc4-O7

Lee Revell
2004-08-14T04:45:33Z

On Fri, 2004-08-13 at 06:48, Ingo Molnar wrote:
> ok, it seems the lock-break of the outer loop was not enough - the up to
> 1024 iterations in the inner loop can generate quite high latencies too.
>

In some of the traces, like this one:

http://krustophenia.net/testresults.php?dataset=2.6.8-rc4-bk3-O7#/var/www/2.6.8-rc4-bk3-O7/mount_reiserfs_latency_trace.txt

there are calls to voluntary_resched. How is this possible? Does it
mean that we called voluntary_resched while holding a spinlock, where we
needed to call voluntary_preempt_lock(&foo_lock), and thus failed to
reschedule?

Lee