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From: Johannes Erdfelt <johannes@erdfelt.com>
To: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Joe Lawrence <joe.lawrence@redhat.com>,
	Jessica Yu <jeyu@kernel.org>, Jiri Kosina <jikos@kernel.org>,
	Miroslav Benes <mbenes@suse.cz>,
	Steven Rostedt <rostedt@goodmis.org>,
	Ingo Molnar <mingo@redhat.com>,
	live-patching@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Oops caused by race between livepatch and ftrace
Date: Mon, 20 May 2019 14:48:02 -0700	[thread overview]
Message-ID: <20190520214801.GD1646@sventech.com> (raw)
In-Reply-To: <20190520211931.vokbqxkx5kb6k2bz@treble>

On Mon, May 20, 2019, Josh Poimboeuf <jpoimboe@redhat.com> wrote:
> I think you must have been looking at an old version.
> 
> [(v5.2-rc1)] ~/git/linux $ grep jeyu MAINTAINERS
> M:	Jessica Yu <jeyu@kernel.org>

Operator error on my part. I was looking at a different directory with
an old branch checked out. Sorry!

> Can you try this patch (completely untested)?

It seems to be working fine for me. No crashes in a loop for a few
minutes, when it would usually only take a couple of tries to reproduce
the issue for me.

I'll see if I can better reproduce the race from the ftrace side since
every crash I have seen for this issue has been in apply_relocate_add
on the livepatch side.

JE


  parent reply	other threads:[~2019-05-20 21:48 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-20 19:49 Johannes Erdfelt
2019-05-20 20:46 ` Joe Lawrence
2019-05-20 21:09   ` Johannes Erdfelt
2019-05-20 21:19     ` Josh Poimboeuf
2019-05-20 21:39       ` Steven Rostedt
2019-05-21 14:16         ` Josh Poimboeuf
2019-05-21 14:42           ` Steven Rostedt
2019-05-21 16:42             ` Josh Poimboeuf
2019-05-21 16:53               ` Steven Rostedt
2019-05-29 11:17                 ` Jiri Kosina
2019-05-29 12:06                   ` Steven Rostedt
2019-05-29 12:30                     ` Josh Poimboeuf
2019-05-22 13:00               ` Josh Poimboeuf
2019-05-29 17:29               ` Jessica Yu
2019-05-29 17:39                 ` Josh Poimboeuf
2019-05-29 18:34                   ` Jessica Yu
2019-05-20 21:48       ` Johannes Erdfelt [this message]
2019-05-20 21:19     ` Joe Lawrence
2019-05-21 19:27       ` Joe Lawrence
2019-05-21 21:00         ` Josh Poimboeuf

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