From: Peter Zijlstra <peterz@infradead.org>
To: "Liu, Chuansheng" <chuansheng.liu@intel.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Yanmin Zhang <yanmin_zhang@linux.intel.com>,
"tglx@linutronix.de" <tglx@linutronix.de>
Subject: RE: [PATCH] Fix the race between smp_call_function and CPU booting
Date: Wed, 14 Mar 2012 10:43:17 +0100 [thread overview]
Message-ID: <1331718197.18960.106.camel@twins> (raw)
In-Reply-To: <27240C0AC20F114CBF8149A2696CBE4A0556FA@SHSMSX101.ccr.corp.intel.com>
On Wed, 2012-03-14 at 06:27 +0000, Liu, Chuansheng wrote:
> On the unplug case, after set the CPU to !active, we do not need IPI
> handling for the corresponding
> CPU before it is set to offline. I did not find any impact that
> limiting the smp_call_function
> just after CPU is active.
Have a look at Alpha, it's flush_tlb_mm() can use smp_call_function(),
in the !active,online case you very much still need to tlb flush that
cpu.
The fact that it works on a limited use case on x86 doesn't say anything
much at all.
next prev parent reply other threads:[~2012-03-14 9:43 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-12 9:27 Liu, Chuansheng
2012-03-12 9:32 ` Peter Zijlstra
2012-03-13 6:43 ` Liu, Chuansheng
2012-03-12 9:58 ` Peter Zijlstra
2012-03-13 6:46 ` Liu, Chuansheng
2012-03-13 15:57 ` Peter Zijlstra
2012-03-14 6:27 ` Liu, Chuansheng
2012-03-14 9:43 ` Peter Zijlstra [this message]
2012-03-15 0:11 ` Liu, Chuansheng
2012-03-15 10:46 ` Peter Zijlstra
2012-03-16 6:24 ` Liu, Chuansheng
2012-03-16 9:49 ` Peter Zijlstra
2012-03-19 0:58 ` Liu, Chuansheng
2012-03-19 10:03 ` Peter Zijlstra
2012-03-20 0:22 ` Liu, Chuansheng
2012-03-20 12:17 ` Peter Zijlstra
2012-03-20 13:14 ` Srivatsa S. Bhat
2012-03-20 13:41 ` Peter Zijlstra
2012-03-20 15:02 ` Srivatsa S. Bhat
2012-03-21 5:59 ` Liu, Chuansheng
2012-03-21 9:12 ` Peter Zijlstra
2012-03-21 12:25 ` Peter Zijlstra
2012-03-22 0:59 ` Liu, Chuansheng
2012-03-23 10:25 ` Peter Zijlstra
2012-03-23 11:32 ` Liu, Chuansheng
2012-03-23 12:02 ` Peter Zijlstra
2012-03-23 12:06 ` Liu, Chuansheng
2012-03-23 12:13 ` Peter Zijlstra
2012-03-23 12:21 ` Liu, Chuansheng
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