From: Ingo Molnar <mingo@elte.hu>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Mark Gross <mgross@linux.co.intel.com>,
Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] SMP signal latency fix up.
Date: Fri, 7 Nov 2003 16:31:50 +0100 (CET) [thread overview]
Message-ID: <Pine.LNX.4.56.0311071629580.30463@earth> (raw)
In-Reply-To: <Pine.LNX.4.56.0311071610320.29925@earth>
> the 'is it running' check is 'task_curr(p)', which in this circumstance is
> equivalent to the following test:
>
> per_cpu(runqueues, (cpu)).curr == p
btw., the 'is it running right now' test is a necessary thing as well - we
really dont want to flood CPUs with IPIs which just happen to have the
target task in their runqueue (but the task is not executing).
Ingo
next prev parent reply other threads:[~2003-11-08 0:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-06 22:49 Mark Gross
2003-11-06 23:20 ` Linus Torvalds
2003-11-07 1:39 ` Mark Gross
2003-11-07 1:42 ` Mark Gross
2003-11-07 9:45 ` Ingo Molnar
2003-11-07 15:43 ` Mark Gross
2003-11-07 9:39 ` Ingo Molnar
2003-11-07 15:09 ` Linus Torvalds
2003-11-07 15:17 ` Ingo Molnar
2003-11-07 15:31 ` Ingo Molnar [this message]
2003-11-07 15:29 ` Ingo Molnar
2003-11-07 17:03 ` Mark Gross
2003-11-08 6:48 ` Ingo Molnar
2003-11-06 23:26 ` Chris Friesen
2003-11-06 23:35 ` Mark Gross
2003-11-07 0:55 ` Nuno Silva
2003-11-07 10:24 ` Ingo Molnar
2003-11-06 23:00 Mark Gross
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