From: Tejun Heo <htejun@gmail.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
LKML <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Steven Rostedt <rostedt@rostedt.homelinux.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Christoph Hellwig <hch@lst.de>, Li Zefan <lizf@cn.fujitsu.com>,
Lai Jiangshan <laijs@cn.fujitsu.com>,
Johannes Berg <johannes.berg@intel.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Arnaldo Carvalho de Melo <acme@infradead.org>,
Tom Zanussi <tzanussi@gmail.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [patch 0/2] x86: NMI-safe trap handlers
Date: Thu, 15 Jul 2010 01:29:22 +0200 [thread overview]
Message-ID: <4C3E4852.9010306@gmail.com> (raw)
In-Reply-To: <20100714185617.GB22373@basil.fritz.box>
Hello,
On 07/14/2010 08:56 PM, Andi Kleen wrote:
> On Wed, Jul 14, 2010 at 01:08:05PM -0400, Mathieu Desnoyers wrote:
>> * Andi Kleen (andi@firstfloor.org) wrote:
>>>> x86_32 cannot use vmalloc_sync_all() to sychronize the TLBs from
>>>> every processes because the vmalloc area is mapped in a different
>>>> address space for
>>> That doesn't make sense. vmalloc_all_sync() should work on 32bit
>>> too. It just needs to walk all processes and fix up every page
>>> table.
Yeah, vmalloc_sync_all() synchronizes everything by walking every page
table, so it should work. I was saying that just flushing TLB
wouldn't cut it because multiple top level page table entries can be
used to map vmalloc areas. It seems that both 32 and 64bit does that
tho.
Thanks.
--
tejun
prev parent reply other threads:[~2010-07-14 23:29 UTC|newest]
Thread overview: 163+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-14 15:49 [patch 0/2] x86: NMI-safe trap handlers Mathieu Desnoyers
2010-07-14 15:49 ` [patch 1/2] x86_64 page fault NMI-safe Mathieu Desnoyers
2010-07-14 16:28 ` Linus Torvalds
2010-07-14 17:06 ` Mathieu Desnoyers
2010-07-14 18:10 ` Linus Torvalds
2010-07-14 18:46 ` Ingo Molnar
2010-07-14 19:14 ` Linus Torvalds
2010-07-14 19:36 ` Frederic Weisbecker
2010-07-14 19:54 ` Linus Torvalds
2010-07-14 20:17 ` Mathieu Desnoyers
2010-07-14 20:55 ` Linus Torvalds
2010-07-14 21:18 ` Ingo Molnar
2010-07-14 22:14 ` Frederic Weisbecker
2010-07-14 22:31 ` Mathieu Desnoyers
2010-07-14 22:48 ` Frederic Weisbecker
2010-07-14 23:11 ` Mathieu Desnoyers
2010-07-14 23:38 ` Frederic Weisbecker
2010-07-15 16:26 ` Mathieu Desnoyers
2010-08-03 17:18 ` Peter Zijlstra
2010-08-03 18:25 ` Mathieu Desnoyers
2010-08-04 6:46 ` Peter Zijlstra
2010-08-04 7:14 ` Ingo Molnar
2010-08-04 14:45 ` Mathieu Desnoyers
2010-08-04 14:56 ` Peter Zijlstra
2010-08-06 1:49 ` Mathieu Desnoyers
2010-08-06 9:51 ` Peter Zijlstra
2010-08-06 13:46 ` Mathieu Desnoyers
2010-08-06 6:18 ` Masami Hiramatsu
2010-08-06 9:50 ` Peter Zijlstra
2010-08-06 13:37 ` Mathieu Desnoyers
2010-08-07 9:51 ` Masami Hiramatsu
2010-08-09 16:53 ` Frederic Weisbecker
2010-08-03 18:56 ` Linus Torvalds
2010-08-03 19:45 ` Mathieu Desnoyers
2010-08-03 20:02 ` Linus Torvalds
2010-08-03 20:10 ` Ingo Molnar
2010-08-03 20:21 ` Ingo Molnar
2010-08-03 21:16 ` Mathieu Desnoyers
2010-08-03 20:54 ` Mathieu Desnoyers
2010-08-04 6:27 ` Peter Zijlstra
2010-08-04 14:06 ` Mathieu Desnoyers
2010-08-04 14:50 ` Peter Zijlstra
2010-08-06 1:42 ` Mathieu Desnoyers
2010-08-06 10:11 ` Peter Zijlstra
2010-08-06 11:14 ` Peter Zijlstra
2010-08-06 14:15 ` Mathieu Desnoyers
2010-08-06 14:13 ` Mathieu Desnoyers
2010-08-11 14:44 ` Steven Rostedt
2010-08-11 14:34 ` Steven Rostedt
2010-08-15 13:35 ` Mathieu Desnoyers
2010-08-15 16:33 ` Avi Kivity
2010-08-15 16:44 ` Mathieu Desnoyers
2010-08-15 16:51 ` Avi Kivity
2010-08-15 18:31 ` Mathieu Desnoyers
2010-08-16 10:49 ` Avi Kivity
2010-08-16 11:29 ` Avi Kivity
2010-08-04 6:46 ` Dave Chinner
2010-08-04 7:21 ` Ingo Molnar
2010-07-14 23:40 ` Steven Rostedt
2010-07-14 19:41 ` Linus Torvalds
2010-07-14 19:56 ` Andi Kleen
2010-07-14 20:05 ` Mathieu Desnoyers
2010-07-14 20:07 ` Andi Kleen
2010-07-14 20:08 ` H. Peter Anvin
2010-07-14 23:32 ` Tejun Heo
2010-07-14 22:31 ` Frederic Weisbecker
2010-07-14 22:56 ` Linus Torvalds
2010-07-14 23:09 ` Andi Kleen
2010-07-14 23:22 ` Linus Torvalds
2010-07-15 14:11 ` Frederic Weisbecker
2010-07-15 14:35 ` Andi Kleen
2010-07-16 11:21 ` Frederic Weisbecker
2010-07-15 14:46 ` Steven Rostedt
2010-07-16 10:47 ` Frederic Weisbecker
2010-07-16 11:43 ` Steven Rostedt
2010-07-15 14:51 ` Linus Torvalds
2010-07-15 15:38 ` Linus Torvalds
2010-07-16 12:00 ` Frederic Weisbecker
2010-07-16 12:54 ` Steven Rostedt
2010-07-14 20:39 ` Mathieu Desnoyers
2010-07-14 21:23 ` Linus Torvalds
2010-07-14 21:45 ` Maciej W. Rozycki
2010-07-14 21:52 ` Linus Torvalds
2010-07-14 22:31 ` Maciej W. Rozycki
2010-07-14 22:21 ` Mathieu Desnoyers
2010-07-14 22:37 ` Linus Torvalds
2010-07-14 22:51 ` Jeremy Fitzhardinge
2010-07-14 23:02 ` Linus Torvalds
2010-07-14 23:54 ` Jeremy Fitzhardinge
2010-07-15 1:23 ` Linus Torvalds
2010-07-15 1:45 ` Linus Torvalds
2010-07-15 18:31 ` Mathieu Desnoyers
2010-07-15 18:43 ` Linus Torvalds
2010-07-15 18:48 ` Linus Torvalds
2010-07-15 22:01 ` Mathieu Desnoyers
2010-07-15 22:16 ` Linus Torvalds
2010-07-15 22:24 ` H. Peter Anvin
2010-07-15 22:26 ` Linus Torvalds
2010-07-15 22:46 ` H. Peter Anvin
2010-07-15 22:58 ` Andi Kleen
2010-07-15 23:20 ` H. Peter Anvin
2010-07-15 23:23 ` Linus Torvalds
2010-07-15 23:41 ` H. Peter Anvin
2010-07-15 23:44 ` Linus Torvalds
2010-07-15 23:46 ` H. Peter Anvin
2010-07-15 23:48 ` Andi Kleen
2010-07-15 22:30 ` Mathieu Desnoyers
2010-07-16 19:13 ` Mathieu Desnoyers
2010-07-15 16:44 ` Mathieu Desnoyers
2010-07-15 16:49 ` Linus Torvalds
2010-07-15 17:38 ` Mathieu Desnoyers
2010-07-15 20:44 ` H. Peter Anvin
2010-07-18 11:03 ` Avi Kivity
2010-07-18 17:36 ` Linus Torvalds
2010-07-18 18:04 ` Avi Kivity
2010-07-18 18:22 ` Linus Torvalds
2010-07-19 7:32 ` Avi Kivity
2010-07-18 18:17 ` Linus Torvalds
2010-07-18 18:43 ` Steven Rostedt
2010-07-18 19:26 ` Linus Torvalds
2010-07-14 15:49 ` [patch 2/2] x86 NMI-safe INT3 and Page Fault Mathieu Desnoyers
2010-07-14 16:42 ` Maciej W. Rozycki
2010-07-14 18:12 ` Mathieu Desnoyers
2010-07-14 19:21 ` Maciej W. Rozycki
2010-07-14 19:58 ` Mathieu Desnoyers
2010-07-14 20:36 ` Maciej W. Rozycki
2010-07-16 12:28 ` Avi Kivity
2010-07-16 14:49 ` Mathieu Desnoyers
2010-07-16 15:34 ` Andi Kleen
2010-07-16 15:40 ` Mathieu Desnoyers
2010-07-16 16:47 ` Avi Kivity
2010-07-16 16:58 ` Mathieu Desnoyers
2010-07-16 17:54 ` Avi Kivity
2010-07-16 18:05 ` H. Peter Anvin
2010-07-16 18:15 ` Avi Kivity
2010-07-16 18:17 ` H. Peter Anvin
2010-07-16 18:28 ` Avi Kivity
2010-07-16 18:37 ` Linus Torvalds
2010-07-16 19:26 ` Avi Kivity
2010-07-16 21:39 ` Linus Torvalds
2010-07-16 22:07 ` Andi Kleen
2010-07-16 22:26 ` Linus Torvalds
2010-07-16 22:41 ` Andi Kleen
2010-07-17 1:15 ` Linus Torvalds
2010-07-16 22:40 ` Mathieu Desnoyers
2010-07-18 9:23 ` Avi Kivity
2010-07-16 18:22 ` Mathieu Desnoyers
2010-07-16 18:32 ` Avi Kivity
2010-07-16 19:29 ` H. Peter Anvin
2010-07-16 19:39 ` Avi Kivity
2010-07-16 19:32 ` Andi Kleen
2010-07-16 18:25 ` Linus Torvalds
2010-07-16 19:30 ` Andi Kleen
2010-07-18 9:26 ` Avi Kivity
2010-07-16 19:28 ` Andi Kleen
2010-07-16 19:32 ` Avi Kivity
2010-07-16 19:34 ` Andi Kleen
2010-08-04 9:46 ` Peter Zijlstra
2010-08-04 20:23 ` H. Peter Anvin
2010-07-14 17:06 ` [patch 0/2] x86: NMI-safe trap handlers Andi Kleen
2010-07-14 17:08 ` Mathieu Desnoyers
2010-07-14 18:56 ` Andi Kleen
2010-07-14 23:29 ` Tejun Heo [this message]
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