Messages in this thread | | | Date | Thu, 1 Dec 2011 13:55:55 +0100 | From | Stanislaw Gruszka <> | Subject | Re: [3.2-rc3] 100% CPU usage while in del_timer_sync from iwl3945_rs_free_sta |
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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
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