From: Marek Lindner <lindner_marek@yahoo.de>
To: The list for a Better Approach To Mobile Ad-hoc Networking
<b.a.t.m.a.n@lists.open-mesh.org>
Subject: Re: [B.A.T.M.A.N.] [PATCH 2/2] batman-adv: Avoid deadlock between rtnl_lock and s_active
Date: Wed, 4 May 2011 16:57:16 +0200 [thread overview]
Message-ID: <201105041657.17393.lindner_marek@yahoo.de> (raw)
In-Reply-To: <1304421006-7137-1-git-send-email-linus.luessing@web.de>
On Tuesday 03 May 2011 13:10:06 Linus Lüssing wrote:
> From: Sven Eckelmann <sven@narfation.org>
>
> The hard_if_event is called by the notifier with rtnl_lock and tries to
> remove sysfs entries when a NETDEV_UNREGISTER event is received. This
> will automatically take the s_active lock.
>
> The s_active lock is also used when a new interface is added to a meshif
> through sysfs. In that situation we cannot wait for the rntl_lock before
> creating the actual batman-adv interface to prevent a deadlock. It is
> still possible to try to get the rtnl_lock and immediately abort the
> current operation when the trylock call failed.
Applied in b278a6c.
Thanks,
Marek
next prev parent reply other threads:[~2011-05-04 14:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-02 19:19 [B.A.T.M.A.N.] [PATCHv4 1/2] batman-adv: Remove unnecessary hardif_list_lock Sven Eckelmann
2011-05-02 19:19 ` [B.A.T.M.A.N.] [PATCHv4 2/2] batman-adv: Avoid deadlock between rtnl_lock and s_active Sven Eckelmann
2011-05-03 9:51 ` [B.A.T.M.A.N.] (no subject) Linus Lüssing
2011-05-03 9:51 ` [B.A.T.M.A.N.] [PATCH 1/2] batman-adv: Remove unnecessary hardif_list_lock Linus Lüssing
2011-05-03 11:10 ` [B.A.T.M.A.N.] [PATCH 2/2] batman-adv: Avoid deadlock between rtnl_lock and s_active Linus Lüssing
2011-05-04 14:57 ` Marek Lindner [this message]
2011-05-04 14:50 ` [B.A.T.M.A.N.] [PATCH 1/2] batman-adv: Remove unnecessary hardif_list_lock Marek Lindner
2011-05-03 9:51 ` [B.A.T.M.A.N.] [PATCH 2/2] batman-adv: Avoid deadlock between rtnl_lock and s_active Linus Lüssing
2011-05-03 12:40 ` [B.A.T.M.A.N.] (no subject) Sven Eckelmann
-- strict thread matches above, loose matches on Subject: below --
2011-04-29 20:00 [B.A.T.M.A.N.] [PATCH 1/2] batman-adv: Remove unnecessary hardif_list_lock Sven Eckelmann
2011-04-29 20:00 ` [B.A.T.M.A.N.] [PATCH 2/2] batman-adv: Avoid deadlock between rtnl_lock and s_active Sven Eckelmann
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