From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Guillaume Autran <gautran@mrv.com>
Cc: linux-ppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Re: [PATCH] 8xx: get_mmu_context() for (very) FEW_CONTEXTS and KERNEL_PREEMPT race/starvation issue
Date: Thu, 30 Jun 2005 09:24:15 +1000 [thread overview]
Message-ID: <1120087455.31924.11.camel@gaston> (raw)
In-Reply-To: <42C2BF03.9000402@mrv.com>
> I'm still a bit confused with "kernel preemption". One thing for sure
> is that disabling kernel preemption does indeed fix my problem.
> So, my question is, what if a task in the middle of being schedule
> gets preempted by an IRQ handler, where will this task restart
> execution ? Back at the beginning of schedule or where it left of ?
I very much doubt that schedule itself can be preempted :)
> The idea behind my patch was to get rid of that nr_free_contexts
> counter that is (I thing) redundant with the context_map.
next prev parent reply other threads:[~2005-06-29 23:29 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-25 14:53 [PATCH] 8xx: map_page() skip pinned region and tlbie debugging aid Marcelo Tosatti
2005-06-25 22:24 ` Dan Malek
2005-06-26 14:30 ` Marcelo Tosatti
2005-06-27 13:39 ` Marcelo Tosatti
2005-06-27 20:46 ` Dan Malek
2005-06-28 6:30 ` Benjamin Herrenschmidt
2005-06-28 13:42 ` [PATCH] 8xx: get_mmu_context() for (very) FEW_CONTEXTS and KERNEL_PREEMPT race/starvation issue Guillaume Autran
2005-06-29 4:15 ` Benjamin Herrenschmidt
2005-06-29 15:32 ` Guillaume Autran
2005-06-29 15:54 ` Marcelo Tosatti
2005-06-29 21:25 ` Guillaume Autran
2005-06-29 17:00 ` Marcelo Tosatti
2005-06-29 23:26 ` Benjamin Herrenschmidt
2005-06-29 19:38 ` Marcelo Tosatti
2005-06-30 13:54 ` Guillaume Autran
2005-07-05 13:12 ` Guillaume Autran
2005-06-30 0:34 ` Eugene Surovegin
2005-06-29 23:24 ` Benjamin Herrenschmidt [this message]
2005-06-28 13:53 ` [PATCH] 8xx: map_page() skip pinned region and tlbie debugging aid Dan Malek
2005-06-28 23:47 ` Benjamin Herrenschmidt
2005-06-29 17:19 ` Marcelo Tosatti
2005-06-29 23:31 ` Benjamin Herrenschmidt
2005-06-30 18:05 ` Dan Malek
2005-06-30 23:29 ` Benjamin Herrenschmidt
2005-07-01 7:01 ` Pantelis Antoniou
2005-06-30 17:49 ` Dan Malek
2005-06-27 14:28 ` [PATCH] 8xx: tlbie debugging aid (try #2) Marcelo Tosatti
2005-06-27 20:18 ` Dan Malek
2005-06-27 14:56 ` Marcelo Tosatti
2005-06-27 20:53 ` Dan Malek
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