Date: Tue, 26 Mar 2013 17:29:45 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Joshua Isom <jrisom@gmail.com> Cc: freebsd-wireless@freebsd.org Subject: Re: [wip] ar9300 hostap support Message-ID: <CAJ-VmomDXdo-Ep02a_BBByw5Jkx6hcodhkXt=LeYaQnLunu-qQ@mail.gmail.com> In-Reply-To: <51523B6F.5010506@gmail.com> References: <CAJ-Vmo=4QRuYeG8LmEfntTB2W5OyfsnVDCz5cJ__zWYbXkme3w@mail.gmail.com> <CAJ-VmomtQFjiGZRR0ME3HvGaJjHfXq%2BRT6a699UUDqGnJM1zjw@mail.gmail.com> <CAJ-Vmon7-g6DOdCsF05i4twfL_UXjBYUneGYts6dZbiFgH3zww@mail.gmail.com> <51522277.6040107@gmail.com> <CAJ-VmonuiJ%2B3mwOtwZtSbm2T6_kisNV1wmzQPcXDo638_Kq0aQ@mail.gmail.com> <51523B6F.5010506@gmail.com>
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it's the same underlying problem as before. I just screwed up the locking. Lemme fix that. Adrian On 26 March 2013 17:21, Joshua Isom <jrisom@gmail.com> wrote: > Another panic, but a different cause. I think I'd seen it once before but > I'm not sure. > > Unread portion of the kernel message buffer: > > ath0: ath_edma_recv_proc_queue: handled npkts 0 > ath0: ath_edma_tx_processq: Q1: empty? > panic: _mtx_lock_sleep: recursed on non-recursive mutex ath0_txq1 @ > /root/ATH/head/sys/modules/ath/../../dev/ath/if_ath_tx_edma.c:667 > > cpuid = 1 > KDB: enter: panic > > [...] > > (kgdb) bt > #0 doadump (textdump=0) at pcpu.h:229 > #1 0xffffffff802fb52e in db_dump (dummy=<value optimized out>, dummy2=0, > dummy3=0, dummy4=0x0) > at /root/ATH/head/sys/ddb/db_command.c:543 > #2 0xffffffff802fafda in db_command (last_cmdp=<value optimized out>, > cmd_table=<value optimized out>, dopager=1) > at /root/ATH/head/sys/ddb/db_command.c:449 > #3 0xffffffff802fad92 in db_command_loop () at > /root/ATH/head/sys/ddb/db_command.c:502 > #4 0xffffffff802fd740 in db_trap (type=<value optimized out>, code=0) at > /root/ATH/head/sys/ddb/db_main.c:231 > #5 0xffffffff8056e4e3 in kdb_trap (type=3, code=0, tf=<value optimized > out>) at /root/ATH/head/sys/kern/subr_kdb.c:654 > #6 0xffffffff807d5368 in trap (frame=0xffffff8020bdd7d0) at > /root/ATH/head/sys/amd64/amd64/trap.c:579 > #7 0xffffffff807be232 in calltrap () at exception.S:228 > #8 0xffffffff8056dcce in kdb_enter (why=0xffffffff808abd45 "panic", > msg=<value optimized out>) at cpufunc.h:63 > #9 0xffffffff805390f7 in vpanic (fmt=<value optimized out>, ap=<value > optimized out>) > at /root/ATH/head/sys/kern/kern_shutdown.c:747 > #10 0xffffffff80538fa6 in kassert_panic (fmt=<value optimized out>) at > /root/ATH/head/sys/kern/kern_shutdown.c:642 > #11 0xffffffff80524cfa in __mtx_lock_sleep (c=0xffffff800090dea8, > tid=18446741874793984000, opts=<value optimized out>, > file=<value optimized out>, line=549311568) at > /root/ATH/head/sys/kern/kern_mutex.c:394 > #12 0xffffffff8052491a in __mtx_lock_flags (c=<value optimized out>, opts=0, > file=0xffffffff813f2dcf > "/root/ATH/head/sys/modules/ath/../../dev/ath/if_ath_tx_edma.c", line=667) > at /root/ATH/head/sys/kern/kern_mutex.c:224 > #13 0xffffffff81335467 in ath_edma_tx_processq (sc=0xffffff800090d000, > dosched=1) > at /root/ATH/head/sys/modules/ath/../../dev/ath/if_ath_tx_edma.c:667 > #14 0xffffffff8057cea0 in taskqueue_run_locked (queue=0xfffffe0006488500) at > /root/ATH/head/sys/kern/subr_taskqueue.c:333 > #15 0xffffffff8057d67b in taskqueue_thread_loop (arg=<value optimized out>) > at /root/ATH/head/sys/kern/subr_taskqueue.c:535 > #16 0xffffffff80508a14 in fork_exit (callout=0xffffffff8057d5e0 > <taskqueue_thread_loop>, arg=0xffffff800090d810, > frame=0xffffff8020bddc00) at /root/ATH/head/sys/kern/kern_fork.c:991 > #17 0xffffffff807be76e in fork_trampoline () at exception.S:602 > #18 0x0000000000000000 in ?? () > > > > On 3/26/2013 7:11 PM, Adrian Chadd wrote: >> >> >> Hah, that's nice to know. >> >> Please let me know if you see any further issues here. >> >> I have another tweak to add in soon in the TX completion code; I just >> noticed a very subtle difference between what my code does and what >> the reference code does. >> >> Thanks, >> >> >> >> Adrian >> >
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