Messages in this thread |  | | | Subject | Re: [RFC&PATCH] Alternative RCU implementation | | From | Jim Houston <> | | Date | 02 Sep 2004 21:19:17 -0400 |
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On Thu, 2004-09-02 at 17:20, Manfred Spraul wrote: > Jim Houston wrote: > > >We add the following /proc files: > >/proc/shield/ltmrs > > Setting a bit limits the use of local timers on the > > corresponding cpu. > > > How do you handle schedule_delayed_work_on()? > slab uses it to drain the per-cpu caches. It's not fatal if a cpu > doesn't drain it's caches (just some wasted memory), but it should be > documented.
Hi Manfred,
The timer shielding migrates most of the timers to non-shielded cpus but does keep track of timers queued with add_timer_on(). These are polled periodically from a non-shielded cpu, and an inter-processsor interrupt is used to force the shielded cpu to handle their expiry.
Jim Houston - Concurrent Computer Corp.
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