From: Stanislaw Gruszka <sgruszka@redhat.com>
To: Michal Hocko <mhocko@suse.cz>, Eliad Peller <eliad@wizery.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
"John W. Linville" <linville@tuxdriver.com>,
linux-wireless@vger.kernel.org,
Yong Zhang <yong.zhang0@gmail.com>
Subject: Re: [3.2-rc3] 100% CPU usage while in del_timer_sync from iwl3945_rs_free_sta
Date: Thu, 1 Dec 2011 13:55:55 +0100 [thread overview]
Message-ID: <20111201125554.GC5706@redhat.com> (raw)
In-Reply-To: <20111201124440.GB25614@tiehlicka.suse.cz>
On Thu, Dec 01, 2011 at 01:44:40PM +0100, Michal Hocko wrote:
> On Thu 01-12-11 12:59:12, Stanislaw Gruszka wrote:
> > On Thu, Dec 01, 2011 at 11:55:38AM +0100, Michal Hocko wrote:
> > > [ 349.316070] iwl3945_rs_free_sta rs_sta f4be1ac0
> > > [ 349.316076] ------------[ cut here ]------------
> > > [ 349.316097] WARNING: at drivers/net/wireless/iwlegacy/iwl-3945-rs.c:438 iwl3945_rs_free_sta+0x33/0x42 [iwl3945]()
> >
> > Johannes pointed on irc that this problem is most likely caused by:
> >
> > commit f785d83a19bca326f79d127a413e35769afc0105
> > Author: Eliad Peller <eliad@wizery.com>
> > Date: Mon Aug 8 16:50:22 2011 +0300
> >
> > mac80211: clear sta.drv_priv on reconfiguration
> >
> > Michal, could you confirm that? If that is the root of the problem, we
> > need patch for iwlegacy (and iwlwifi) that allocate separate memory for
> > rc structures.
Actually this require quite big changes in iwlegacy at least, perhaps
also in iwlwifi. I prefer to revert commit as temporary fix, and add
memset(0) to drivers .add_sta callback, in drivers which need it. After
changing iwlegcy/iwlwifi we could move memset(0) back to ieee80211_reconfig().
Eliad, thoughts?
> Should I just revert it?
Yes, or remove proper line :-)
Stanislaw
next prev parent reply other threads:[~2011-12-01 12:55 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-29 10:07 [3.2-rc3] 100% CPU usage while in del_timer_sync from iwl3945_rs_free_sta Michal Hocko
2011-11-29 11:39 ` Stanislaw Gruszka
2011-11-30 10:10 ` Michal Hocko
2011-11-30 14:23 ` Stanislaw Gruszka
2011-11-30 14:03 ` Michal Hocko
2011-11-30 15:39 ` Stanislaw Gruszka
2011-12-01 8:58 ` Michal Hocko
2011-12-01 10:55 ` Michal Hocko
2011-12-01 11:59 ` Stanislaw Gruszka
2011-12-01 12:44 ` Michal Hocko
2011-12-01 12:55 ` Stanislaw Gruszka [this message]
2011-12-01 13:13 ` Eliad Peller
2011-12-01 13:31 ` Stanislaw Gruszka
2011-12-01 13:37 ` Sedat Dilek
2011-12-01 14:05 ` Michal Hocko
2011-12-01 14:23 ` Eliad Peller
2011-12-01 15:45 ` John W. Linville
2011-12-01 12:04 ` Yong Zhang
2011-12-01 12:42 ` Michal Hocko
2011-12-01 2:09 ` Yong Zhang
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