Hm. OK. What I want is the code path _in_ that's queuing a frame via ieee80211_vap_transmit() with m_nextpkt set to NON-NULL.
-adrian On 12 August 2013 10:32, Lev Serebryakov <l...@freebsd.org> wrote: > Hello, Adrian. > You wrote 12 августа 2013 г., 21:29:08: > > AC> So the if_transmit() change did change a few things. if_start() / > AC> *_ENQUEUE() clears m_nextpkt(). > > AC> I'd like to know where m_nextpkt() is NOT being cleared. > > AC> How about triggering it quickly - put in a panic there rather than > AC> NULL'ing it, then when it immediately panics, do a backtrace? > So, replace printf() here with panic()? > Now I have backtrace from panic BEFORE this diagnostic patch is applied. > Isn't it enough? > > #0 doadump (textdump=1) at pcpu.h:236 > 236 pcpu.h: No such file or directory. > in pcpu.h > (kgdb) #0 doadump (textdump=1) at pcpu.h:236 > #1 0xffffffff804b4505 in kern_reboot (howto=260) > at /data/src/sys/kern/kern_shutdown.c:447 > #2 0xffffffff804b48e4 in panic (fmt=<value optimized out>) > at /data/src/sys/kern/kern_shutdown.c:754 > #3 0xffffffff806c5b5a in trap_fatal (frame=<value optimized out>, > eva=<value optimized out>) at /data/src/sys/amd64/amd64/trap.c:873 > #4 0xffffffff806c5dc7 in trap_pfault (frame=0x0, usermode=0) > at /data/src/sys/amd64/amd64/trap.c:699 > #5 0xffffffff806c54f4 in trap (frame=0xffffff812205e7a0) > at /data/src/sys/amd64/amd64/trap.c:463 > #6 0xffffffff806af7b3 in calltrap () > at /data/src/sys/amd64/amd64/exception.S:232 > #7 0xffffffff802ef411 in ath_transmit (ifp=0xfffffe0001a9a800, > m=<value optimized out>) at /data/src/sys/dev/ath/if_ath.c:2953 > #8 0xffffffff8059a1e6 in ieee80211_vap_pkt_send_dest ( > vap=<value optimized out>, m=<value optimized out>, ni=0xffffff8000f96000) > at /data/src/sys/net80211/ieee80211_output.c:239 > #9 0xffffffff8059ae3b in ieee80211_vap_transmit (ifp=<value optimized out>, > m=<value optimized out>) at /data/src/sys/net80211/ieee80211_output.c:389 > #10 0xffffffff8059f5ff in pwrsave_flushq (ni=<value optimized out>) > at /data/src/sys/net80211/ieee80211_power.c:479 > #11 0xffffffff80588209 in hostap_input (ni=0xffffff8000f96000, > m=<value optimized out>, rssi=43, nf=-96) > at /data/src/sys/net80211/ieee80211_hostap.c:648 > #12 0xffffffff8030825a in ath_rx_pkt (sc=0xffffff80007ba000, > rs=0xffffff8000880d78, status=HAL_OK, tsf=<value optimized out>, nf=-96, > qtype=<value optimized out>, m=<value optimized out>) > at /data/src/sys/dev/ath/if_ath_rx.c:808 > #13 0xffffffff80308ec0 in ath_rx_proc (sc=0xffffff80007ba000, resched=1) > at /data/src/sys/dev/ath/if_ath_rx.c:995 > #14 0xffffffff804f2426 in taskqueue_run_locked (queue=0xfffffe0001a59b00) > at /data/src/sys/kern/subr_taskqueue.c:333 > #15 0xffffffff804f2ca8 in taskqueue_thread_loop (arg=<value optimized out>) > at /data/src/sys/kern/subr_taskqueue.c:535 > #16 0xffffffff804885e5 in fork_exit ( > callout=0xffffffff804f2c00 <taskqueue_thread_loop>, > arg=0xffffff80007ba830, frame=0xffffff812205ec00) > at /data/src/sys/kern/kern_fork.c:991 > #17 0xffffffff806afcee in fork_trampoline () > at /data/src/sys/amd64/amd64/exception.S:606 > > > > > -- > // Black Lion AKA Lev Serebryakov <l...@freebsd.org> > _______________________________________________ freebsd-wireless@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-wireless To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"
