From: Martin Wilck <mwilck@suse.com>
To: Benjamin Marzinski <bmarzins@redhat.com>,
device-mapper development <dm-devel@redhat.com>
Subject: Re: [PATCH 1/2] multipathd: register threads that use rcu calls
Date: Fri, 23 Mar 2018 21:56:35 +0100 [thread overview]
Message-ID: <1521838595.13100.108.camel@suse.com> (raw)
In-Reply-To: <1521835246-29080-2-git-send-email-bmarzins@redhat.com>
On Fr, 2018-03-23 at 15:00 -0500, Benjamin Marzinski wrote:
> All calls to condlog() are rcu reader side calls, so any thread that
> uses condlog() must register itself. The only threads that are exempt
> are log_thread, since it never calls condlog (or any other function
> that
> calls get_multipath_config) and mpath_pr_event_handler_fn, which is
> only
> called by mpath_persist, which disables the rcu handling.
>
> Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
--
Dr. Martin Wilck <mwilck@suse.com>, Tel. +49 (0)911 74053 2107
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
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next prev parent reply other threads:[~2018-03-23 20:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-23 20:00 [PATCH 0/2] Fix RCU hang Benjamin Marzinski
2018-03-23 20:00 ` [PATCH 1/2] multipathd: register threads that use rcu calls Benjamin Marzinski
2018-03-23 20:56 ` Martin Wilck [this message]
2018-03-23 20:00 ` [PATCH 2/2] multipath: fix rcu thread cancellation hang Benjamin Marzinski
2018-03-23 21:09 ` Martin Wilck
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