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From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
To: Jiri Kosina <jkosina@suse.cz>
Cc: Steven Rostedt <rostedt@goodmis.org>,
	Jason Baron <jbaron@redhat.com>,
	"H. Peter Anvin" <hpa@linux.intel.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [RFC] [PATCH 0/2] x86: make jump labels use int3-based breakpoint instead of stop_machine()
Date: Thu, 11 Jul 2013 11:21:53 +0900	[thread overview]
Message-ID: <51DE16C1.4030403@hitachi.com> (raw)
In-Reply-To: <alpine.LNX.2.00.1307102213140.25858@pobox.suse.cz>

(2013/07/11 5:25), Jiri Kosina wrote:
> Hi,
> 
> this is a resurrection of a few years old idea to have jump labels use 
> synchronization based on int3 breakpoint rather than relying on 
> stop_machine() with all the consequences.
> 
> ftrace has been doing exactly this kind of patching for year since 
> 08d636b6 ("ftrace/x86: Have arch x86_64 use breakpoints instead of stop 
> machine").
> 
> This patchset first introduces generic text_poke_bp() that provides means 
> to perform this method of patching in parallel to text_poke_smp(), and 
> then converts x86 jump label code to use it.
> 
> If this is merged, I'll do a followup patch converting ftrace to use this 
> infrastructure as well, as it's doing the same thing in principle already.

Hi Jiri,

Thank you for taking over it! :)
If yours is merged, I can move optprobe on that too ;)

Thank you again!!

-- 
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com



  parent reply	other threads:[~2013-07-11  2:21 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-10 20:25 [RFC] [PATCH 0/2] x86: make jump labels use int3-based breakpoint instead of stop_machine() Jiri Kosina
2013-07-10 20:25 ` [RFC] [PATCH 1/2] x86: introduce int3-based instruction patching Jiri Kosina
2013-07-10 21:31   ` [RFC] [PATCH 1/2 v2] " Jiri Kosina
2013-07-10 21:36     ` H. Peter Anvin
2013-07-10 21:48       ` Borislav Petkov
2013-07-10 21:56         ` H. Peter Anvin
2013-07-10 22:14           ` Borislav Petkov
2013-07-10 22:39       ` Jiri Kosina
2013-07-11  3:29       ` Masami Hiramatsu
2013-07-11 10:09       ` Jiri Kosina
2013-07-11 10:54         ` Jiri Kosina
2013-07-11 16:31         ` H. Peter Anvin
2013-07-11 16:46           ` Steven Rostedt
2013-07-11 19:21             ` Jiri Kosina
2013-07-12  1:00             ` Masami Hiramatsu
2013-07-11 14:35       ` Steven Rostedt
2013-07-11 14:47         ` Jason Baron
2013-07-10 21:46     ` Joe Perches
2013-07-11 10:23     ` Masami Hiramatsu
2013-07-11 10:51       ` Jiri Kosina
2013-07-12  0:50         ` Masami Hiramatsu
2013-07-11 16:10       ` H. Peter Anvin
2013-07-11 19:29         ` Jiri Kosina
2013-07-11 20:49           ` H. Peter Anvin
2013-07-11 20:51           ` H. Peter Anvin
2013-07-11 15:57     ` Steven Rostedt
2013-07-11 19:43       ` Jiri Kosina
2013-07-11 19:52         ` Steven Rostedt
2013-07-10 20:25 ` [RFC] [PATCH 2/2] x86: make jump_label use int3-based patching Jiri Kosina
2013-07-10 22:26 ` [RFC] [PATCH 0/2] x86: make jump labels use int3-based breakpoint instead of stop_machine() Jason Baron
2013-07-11  0:04   ` Jiri Kosina
2013-07-11 16:42     ` Steven Rostedt
2013-07-11 19:23       ` Jiri Kosina
2013-07-11 19:54         ` Steven Rostedt
2013-07-11  2:21 ` Masami Hiramatsu [this message]
2013-07-11 20:26 ` [PATCH 2/2 v3] x86: make jump_label use int3-based patching Jiri Kosina
2013-07-12  2:12   ` Steven Rostedt
2013-07-12  5:44   ` Masami Hiramatsu
2013-07-11 20:26 ` [PATCH 1/2 v3] x86: introduce int3-based instruction patching Jiri Kosina
2013-07-11 20:53   ` H. Peter Anvin
2013-07-11 21:04     ` Borislav Petkov
2013-07-11 21:36       ` H. Peter Anvin
2013-07-12  7:57         ` Borislav Petkov
2013-07-17  3:59           ` H. Peter Anvin
2013-07-11 22:31     ` Jiri Kosina
2013-07-12  2:09       ` Steven Rostedt
2013-07-11 23:01   ` Joe Perches
2013-07-12  2:07   ` Steven Rostedt
2013-07-12  2:40   ` Masami Hiramatsu
2013-07-12  9:21 ` [PATCH 1/2 v4] " Jiri Kosina
2013-07-17  1:18   ` [tip:x86/jumplabel] x86: Introduce int3 (breakpoint) -based " tip-bot for Jiri Kosina
2013-07-12  9:22 ` [PATCH 2/2 v4] x86: make jump_label use int3-based patching Jiri Kosina
2013-07-17  1:18   ` [tip:x86/jumplabel] x86: Make " tip-bot for Jiri Kosina

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