From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Petr Mladek <pmladek@suse.cz>,
Seth Jennings <sjenning@redhat.com>,
Jiri Kosina <jkosina@suse.cz>, Vojtech Pavlik <vojtech@suse.cz>,
live-patching@vger.kernel.org, linux-kernel@vger.kernel.org,
Rusty Russell <rusty@rustcorp.com.au>,
Miroslav Benes <mbenes@suse.cz>,
mingo@kernel.org, mathieu.desnoyers@efficios.com,
oleg@redhat.com, paulmck@linux.vnet.ibm.com, andi@firstfloor.org,
rostedt@goodmis.org, tglx@linutronix.de
Subject: Re: [PATCH 2/2] livepatch: fix patched module loading race
Date: Fri, 6 Mar 2015 08:43:20 -0600 [thread overview]
Message-ID: <20150306144320.GA488@treble.redhat.com> (raw)
In-Reply-To: <54F99176.3090104@hitachi.com>
On Fri, Mar 06, 2015 at 08:37:26PM +0900, Masami Hiramatsu wrote:
> Actually, we can suppose this module unloading context is
> not changing universe. thus it is expected behavior, isn't it?
In the case of my proposed consistency model RFC, if the module
unloading task gets preempted, or if mod->exit() calls schedule(), its
task can switch to the new universe before it's done.
And for many modules it could also be possible for other contexts to
access the module's functions in the GOING state before mod->exit()
disables them.
--
Josh
next prev parent reply other threads:[~2015-03-06 14:44 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-03 11:38 [RFC PATCH] livepatch/module: Do not patch modules that are not ready Petr Mladek
2015-03-03 14:55 ` Josh Poimboeuf
2015-03-03 15:48 ` Petr Mladek
2015-03-03 16:01 ` Josh Poimboeuf
2015-03-03 17:34 ` Petr Mladek
2015-03-03 19:31 ` Josh Poimboeuf
2015-03-03 19:35 ` Josh Poimboeuf
2015-03-03 23:02 ` [PATCH 0/2] livepatch: fix patch module loading race Josh Poimboeuf
2015-03-03 23:02 ` [PATCH 1/2] livepatch: remove unnecessary call to klp_find_object_module() Josh Poimboeuf
2015-03-04 9:00 ` Petr Mladek
2015-03-04 21:48 ` Jiri Kosina
2015-03-03 23:02 ` [PATCH 2/2] livepatch: fix patched module loading race Josh Poimboeuf
2015-03-04 13:17 ` Petr Mladek
2015-03-04 14:18 ` Petr Mladek
2015-03-04 15:34 ` Josh Poimboeuf
2015-03-04 15:51 ` Jiri Kosina
2015-03-04 16:41 ` Josh Poimboeuf
2015-03-04 16:36 ` Petr Mladek
2015-03-04 17:57 ` Josh Poimboeuf
2015-03-04 22:02 ` Jiri Kosina
2015-03-04 22:45 ` Josh Poimboeuf
2015-03-05 0:52 ` Masami Hiramatsu
2015-03-05 14:18 ` Josh Poimboeuf
2015-03-06 1:24 ` Masami Hiramatsu
2015-03-06 10:51 ` Petr Mladek
2015-03-06 11:37 ` Masami Hiramatsu
2015-03-06 13:05 ` Petr Mladek
2015-03-06 14:43 ` Josh Poimboeuf [this message]
2015-03-05 14:24 ` Petr Mladek
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