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From: Srivatsa Vaddagiri <vatsa@in.ibm.com>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: rusty@au1.ibm.com, mingo@elte.hu, akpm@osdl.org,
	linux-kernel@vger.kernel.org, lhcs-devel@lists.sourceforge.net
Subject: Re: [Experimental CPU Hotplug PATCH] - Move migrate_all_tasks to CPU_DEAD handling
Date: Tue, 6 Apr 2004 20:26:16 +0530	[thread overview]
Message-ID: <20040406145616.GB8516@in.ibm.com> (raw)
In-Reply-To: <407277AE.2050403@yahoo.com.au>

On Tue, Apr 06, 2004 at 07:26:06PM +1000, Nick Piggin wrote:
> Also in my patch, the offline check should probably be done below
> the check for if (cpu == this_cpu... because that should be a common
> route.

	Will this be true for wakeups which are triggered from 
expiring timers also? The timers on the dead CPU are migrated to other CPUs. 
When they fire, the timer fn runs on a different CPU and can try to wake up a
task 'n add it to dead cpu! So we probably need a unconditional cpu_is_offline
check in try_to_wake_up?



-- 


Thanks and Regards,
Srivatsa Vaddagiri,
Linux Technology Center,
IBM Software Labs,
Bangalore, INDIA - 560017

  reply	other threads:[~2004-04-06 14:55 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-04-05 12:18 [Experimental CPU Hotplug PATCH] - Move migrate_all_tasks to CPU_DEAD handling Srivatsa Vaddagiri
2004-04-06  0:28 ` Nick Piggin
2004-04-06  1:15   ` Srivatsa Vaddagiri
2004-04-06  1:27     ` Nick Piggin
2004-04-06  1:30       ` Nick Piggin
2004-04-06 16:43     ` [lhcs-devel] " Srivatsa Vaddagiri
2004-04-06  8:37   ` Srivatsa Vaddagiri
2004-04-06  9:26     ` Nick Piggin
2004-04-06 14:56       ` Srivatsa Vaddagiri [this message]
2004-04-06 15:04         ` Nick Piggin
2004-04-06 15:20           ` Srivatsa Vaddagiri
2004-04-07  3:54       ` Rusty Russell
2004-04-07  4:11         ` Nick Piggin
2004-04-07  5:01         ` Srivatsa Vaddagiri
2004-04-07  5:32           ` Rusty Russell
2004-04-07 14:17             ` Srivatsa Vaddagiri
2004-04-07 22:55               ` Rusty Russell
2004-04-12 16:08               ` [lhcs-devel] " Srivatsa Vaddagiri
2004-04-06  7:25 ` Ingo Molnar
2004-04-06 14:53   ` Srivatsa Vaddagiri
2004-04-06 15:03   ` Srivatsa Vaddagiri

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