21 Jul
2004
21 Jul
'04
9:28 a.m.
below i've also attached a softirq.c patch against
2.6.8-rc2 that does
unconditional deferring. (this patch is of course not intended to be
merged upstream as-is, since normally we want to process softirqs
right after the irq context.)
i've got a more complete patch against vanilla 2.6.8-rc2:
http://redhat.com/~mingo/voluntary-preempt/defer-softirqs-2.6.8-rc2-A2
which introduces the following tunable:
/proc/sys/kernel/defer_softirqs (default: 0)
this, if enabled, causes all softirqs to be processed within ksoftirqd,
and it also breaks out of the softirq loop if preemption of ksoftirqd
has been triggered by a higher-prio task.
I've also added this additional break-out to the -H6 patch of
voluntary-preempt:
http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8-rc2-H6
it's enabled by default.
Ingo