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From: Steven Rostedt <rostedt@goodmis.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@amacapital.net>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Andy Lutomirski <luto@kernel.org>, Ingo Molnar <mingo@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Jason Baron <jbaron@akamai.com>, Jiri Kosina <jkosina@suse.cz>,
	David Laight <David.Laight@aculab.com>,
	Borislav Petkov <bp@alien8.de>, Julia Cartwright <julia@ni.com>,
	Jessica Yu <jeyu@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
	Nadav Amit <namit@vmware.com>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	Edward Cree <ecree@solarflare.com>,
	Daniel Bristot de Oliveira <bristot@redhat.com>
Subject: Re: [PATCH 08/15] x86/alternatives: Teach text_poke_bp() to emulate instructions
Date: Tue, 11 Jun 2019 11:52:10 -0400	[thread overview]
Message-ID: <20190611115210.490c345a@gandalf.local.home> (raw)
In-Reply-To: <20190611112254.576226fe@gandalf.local.home>

On Tue, 11 Jun 2019 11:22:54 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> What would work would be to:
> 
> 	add breakpoint to first opcode.
> 
> 	call synchronize_tasks();

BTW, that should be "synchronize_rcu_tasks()"

-- Steve

> 
> 	/* All tasks now hitting breakpoint and jumping over affected
> 	code */
> 
> 	update the rest of the instructions.
> 
> 	replace breakpoint with jmp.

  reply	other threads:[~2019-06-11 15:52 UTC|newest]

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-05 13:07 [PATCH 00/15] x86 cleanups and static_call() Peter Zijlstra
2019-06-05 13:07 ` [PATCH 01/15] x86/entry/32: Clean up return from interrupt preemption path Peter Zijlstra
2019-06-07 14:21   ` Josh Poimboeuf
2019-06-05 13:07 ` [PATCH 02/15] x86: Move ENCODE_FRAME_POINTER to asm/frame.h Peter Zijlstra
2019-06-07 14:24   ` Josh Poimboeuf
2019-06-05 13:07 ` [PATCH 03/15] x86/kprobes: Fix frame pointer annotations Peter Zijlstra
2019-06-07 13:02   ` Masami Hiramatsu
2019-06-07 13:36     ` Josh Poimboeuf
2019-06-07 15:21       ` Masami Hiramatsu
2019-06-11  8:12       ` Peter Zijlstra
2019-06-05 13:07 ` [PATCH 04/15] x86/ftrace: Add pt_regs frame annotations Peter Zijlstra
2019-06-07 14:45   ` Josh Poimboeuf
2019-06-05 13:07 ` [PATCH 05/15] x86_32: Provide consistent pt_regs Peter Zijlstra
2019-06-07 13:13   ` Masami Hiramatsu
2019-06-07 19:32   ` Josh Poimboeuf
2019-06-11  8:14     ` Peter Zijlstra
2019-06-05 13:07 ` [PATCH 06/15] x86_32: Allow int3_emulate_push() Peter Zijlstra
2019-06-05 13:08 ` [PATCH 07/15] x86: Add int3_emulate_call() selftest Peter Zijlstra
2019-06-10 16:52   ` Josh Poimboeuf
2019-06-10 16:57     ` Andy Lutomirski
2019-06-11  8:17       ` Peter Zijlstra
2019-06-05 13:08 ` [PATCH 08/15] x86/alternatives: Teach text_poke_bp() to emulate instructions Peter Zijlstra
2019-06-07  5:41   ` Nadav Amit
2019-06-07  8:20     ` Peter Zijlstra
2019-06-07 14:27       ` Masami Hiramatsu
2019-06-07 15:47   ` Masami Hiramatsu
2019-06-07 17:34     ` Peter Zijlstra
2019-06-07 17:48       ` Linus Torvalds
2019-06-11 10:44         ` Peter Zijlstra
2019-06-07 18:10       ` Andy Lutomirski
2019-06-07 20:22         ` hpa
2019-06-11  8:03         ` Peter Zijlstra
2019-06-11 12:08           ` Peter Zijlstra
2019-06-11 12:34             ` Peter Zijlstra
2019-06-11 12:42               ` Peter Zijlstra
2019-06-11 15:22           ` Steven Rostedt
2019-06-11 15:52             ` Steven Rostedt [this message]
2019-06-11 15:55             ` Peter Zijlstra
2019-06-12 19:44               ` Nadav Amit
2019-06-17 14:42                 ` Peter Zijlstra
2019-06-17 17:06                   ` Nadav Amit
2019-06-17 17:25                   ` Andy Lutomirski
2019-06-17 19:26                     ` Peter Zijlstra
2019-06-11 15:54           ` Andy Lutomirski
2019-06-11 16:11             ` Steven Rostedt
2019-06-17 14:31             ` Peter Zijlstra
2019-06-12 17:09       ` Peter Zijlstra
2019-06-10 16:57   ` Josh Poimboeuf
2019-06-11 15:14   ` Steven Rostedt
2019-06-11 15:52     ` Peter Zijlstra
2019-06-11 16:21       ` Peter Zijlstra
2019-06-12 14:44         ` Peter Zijlstra
2019-06-05 13:08 ` [PATCH 09/15] compiler.h: Make __ADDRESSABLE() symbol truly unique Peter Zijlstra
2019-06-05 13:08 ` [PATCH 10/15] static_call: Add basic static call infrastructure Peter Zijlstra
2019-06-06 22:44   ` Nadav Amit
2019-06-07  8:28     ` Peter Zijlstra
2019-06-07  8:49       ` Ard Biesheuvel
2019-06-07 16:33         ` Andy Lutomirski
2019-06-07 16:58         ` Nadav Amit
2019-10-02 13:54       ` Peter Zijlstra
2019-10-02 20:48         ` Josh Poimboeuf
2019-06-05 13:08 ` [PATCH 11/15] static_call: Add inline " Peter Zijlstra
2019-06-06 22:24   ` Nadav Amit
2019-06-07  8:37     ` Peter Zijlstra
2019-06-07 16:35       ` Nadav Amit
2019-06-07 17:41         ` Peter Zijlstra
2019-06-10 17:19       ` Josh Poimboeuf
2019-06-10 18:33         ` Nadav Amit
2019-06-10 18:42           ` Josh Poimboeuf
2019-10-01 12:00         ` Peter Zijlstra
2019-06-05 13:08 ` [PATCH 12/15] x86/static_call: Add out-of-line static call implementation Peter Zijlstra
2019-06-07  6:13   ` Nadav Amit
2019-06-07  7:51     ` Steven Rostedt
2019-06-07  8:38     ` Peter Zijlstra
2019-06-07  8:52       ` Peter Zijlstra
2019-06-05 13:08 ` [PATCH 13/15] x86/static_call: Add inline static call implementation for x86-64 Peter Zijlstra
2019-06-07  5:50   ` Nadav Amit
2019-06-10 18:33   ` Josh Poimboeuf
2019-06-10 18:45     ` Nadav Amit
2019-06-10 18:55       ` Josh Poimboeuf
2019-06-10 19:20         ` Nadav Amit
2019-10-01 14:43     ` Peter Zijlstra
2019-06-05 13:08 ` [PATCH 14/15] static_call: Simple self-test module Peter Zijlstra
2019-06-10 17:24   ` Josh Poimboeuf
2019-06-11  8:29     ` Peter Zijlstra
2019-06-11 13:02       ` Josh Poimboeuf
2019-06-05 13:08 ` [PATCH 15/15] tracepoints: Use static_call Peter Zijlstra

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