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Date: Tue, 5 Aug 2008 08:24:08 -0400 From: Bob Copeland <me@...copeland.com> To: Dave Young <hidave.darkstar@...il.com> Cc: Jiri Slaby <jirislaby@...il.com>, Pekka J Enberg <penberg@...helsinki.fi>, Andrew Morton <akpm@...ux-foundation.org>, Johannes Berg <johannes@...solutions.net>, linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org Subject: Re: [BUG] wireless : cpu stuck for 61s On Tue, Aug 05, 2008 at 09:29:26AM +0800, Dave Young wrote: > With the patch I cann't reproduce the bug with 27-rc1 now. > > > [<c02375a6>] ? debugfs_create_file+0x46/0x210 > > [<c02375a6>] ? debugfs_create_file+0x46/0x210 > > [<c02375a6>] debugfs_create_file+0x46/0x210 > > [<c02377f1>] debugfs_create_dir+0x21/0x30 > > [<f8901f6d>] ieee80211_sta_debugfs_add+0x2d/0x150 [mac80211] > > [<f88eba89>] sta_info_debugfs_add_work+0x89/0x130 [mac80211] > > [<f890a170>] ? rate_control_pid_add_sta_debugfs+0x0/0x30 [mac80211] I wonder if there were two separate problems here. I looked into this with some detail yesterday and agree with Johannes that the above trace is on locking the parent directory's i_mutex, but I too couldn't see any problems with sta_info_debugfs_add_work. Other stuff could also modify the directory with or without rtnl_lock, but not in a way that to my untrained eyes would lead to deadlock. Or is the trace just wrong? -- Bob Copeland %% www.bobcopeland.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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