The following reply was made to PR kern/140036; it has been noted by GNATS.
From: Benjamin Kaduk <ka...@mit.edu> To: Bernhard Schmidt <bschm...@techwires.net> Cc: bug-follo...@freebsd.org Subject: Re: kern/140036: [iwn] [lor] lock order reversal with iwn0_com_lock and iwn0 softc lock Date: Mon, 23 Nov 2009 21:27:15 -0500 (EST) On Mon, 23 Nov 2009, Benjamin Kaduk wrote: > On Sun, 22 Nov 2009, Bernhard Schmidt wrote: >> >> Can you verify that the LOR is gone with the latest checkout of my >> repository? >> Compile instructions: >> http://forums.freebsd.org/showpost.php?p=47627&postcount=16 > > I upgraded to today's current (which picked up a number of > probably-unrelated > changes), and then installed the driver from > your tree on top of it. > No LOR on boot, and I'll let you know if I see any lockups. I got a "lockup" (no idea what actually was happening) while in X tonight; nothing useful is in the logs. I'm not even sure if I can blame iwn for it ... I did get a LOR after turning on the hardware wireless switch, though: iwn0: RF switch: radio enabled wlan0: link state changed to UP lock order reversal: 1st 0xffffff800033d018 iwn0_com_lock (iwn0_com_lock) @ /usr/devel/iwn/freebsd/sys/modules/iwn/../../dev/iwn/if_iwn.c:3280 2nd 0xffffff8000309010 iwn0 (network driver) @ /usr/devel/iwn/freebsd/sys/modules/iwn/../../dev/iwn/if_iwn.c:3289 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a _witness_debugger() at _witness_debugger+0x2e witness_checkorder() at witness_checkorder+0x81e _mtx_lock_flags() at _mtx_lock_flags+0x78 iwn_start() at iwn_start+0x35 if_transmit() at if_transmit+0xd6 ieee80211_start() at ieee80211_start+0x3f4 scan_task() at scan_task+0x4c7 taskqueue_run() at taskqueue_run+0x91 taskqueue_thread_loop() at taskqueue_thread_loop+0x3f fork_exit() at fork_exit+0x12a fork_trampoline() at fork_trampoline+0xe --- trap 0, rip = 0, rsp = 0xffffff80001ffd30, rbp = 0 --- I don't think I'll have time to look at it particularly soon, though. -Ben Kaduk _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
