From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Miroslav Benes <mbenes@suse.cz>
Cc: jeyu@kernel.org, jikos@kernel.org, pmladek@suse.com,
lpechacek@suse.cz, pavel@ucw.cz, live-patching@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 2/2] livepatch: force transition process to finish
Date: Thu, 2 Nov 2017 08:13:18 -0500 [thread overview]
Message-ID: <20171102131318.ovjpygmerxhadhu7@treble> (raw)
In-Reply-To: <20171031114853.841-3-mbenes@suse.cz>
On Tue, Oct 31, 2017 at 12:48:53PM +0100, Miroslav Benes wrote:
> If a task sleeps in a set of patched functions uninterruptedly, it could
> block the whole transition process indefinitely. Thus it may be useful
> to clear its TIF_PATCH_PENDING to allow the process to finish.
The phrase "transition process" (here and in the patch title) confused
me a little bit, since elsewhere we just call it "transition".
> +static ssize_t force_store(struct kobject *kobj, struct kobj_attribute *attr,
> + const char *buf, size_t count)
> +{
> + int ret;
> + bool val;
> +
> + /*
> + * klp_mutex lock is not grabbed here intentionally. It is not really
> + * needed. The race window is harmless and grabbing the lock would only
> + * hold the action back.
> + */
> + if (!klp_transition_patch)
> + return -EINVAL;
> +
> + ret = kstrtobool(buf, &val);
> + if (ret)
> + return ret;
> +
> + if (val)
> + klp_force_transitions();
The plural "transitions" is inconsistent with the rest of the code,
which uses it in the singular. How about klp_force_transition() or
klp_force()?
--
Josh
next prev parent reply other threads:[~2017-11-02 13:13 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-31 11:48 [PATCH v3 0/2] livepatch: Introduce signal and force sysfs attributes Miroslav Benes
2017-10-31 11:48 ` [PATCH v3 1/2] livepatch: send a fake signal to all blocking tasks Miroslav Benes
2017-11-01 15:06 ` Miroslav Benes
2017-11-01 15:13 ` Petr Mladek
2017-11-01 16:43 ` Oleg Nesterov
2017-11-02 10:36 ` Miroslav Benes
2017-11-02 14:08 ` Oleg Nesterov
2017-11-02 13:09 ` Josh Poimboeuf
2017-11-03 8:02 ` Miroslav Benes
2017-11-03 12:57 ` Josh Poimboeuf
2017-11-02 13:32 ` Josh Poimboeuf
2017-11-03 8:06 ` Miroslav Benes
2017-11-06 11:08 ` Pavel Machek
2017-10-31 11:48 ` [PATCH v3 2/2] livepatch: force transition process to finish Miroslav Benes
2017-11-01 15:32 ` Petr Mladek
2017-11-02 13:13 ` Josh Poimboeuf [this message]
2017-11-03 8:07 ` Miroslav Benes
2017-11-06 11:11 ` Pavel Machek
2017-11-06 12:03 ` Jiri Kosina
2017-11-09 11:14 ` Pavel Machek
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