On 10/04/2010 02:38 PM, Ben Greear wrote:
On 10/04/2010 02:13 PM, Luis R. Rodriguez wrote:
On Mon, Oct 4, 2010 at 2:12 PM, Luis R. Rodriguez<mcgrof@xxxxxxxxx>
wrote:
On Mon, Oct 4, 2010 at 12:10 PM, Johannes Berg
<johannes@xxxxxxxxxxxxxxxx> wrote:
On Mon, 2010-10-04 at 12:04 -0700, Ben Greear wrote:
On 10/04/2010 12:01 PM, Johannes Berg wrote:
On Mon, 2010-10-04 at 11:51 -0700, Ben Greear wrote:
Just in case this seems familiar to anyone...
IP: [<f8ba74da>] ieee80211_stop_tx_ba_session+0x14/0x84 [mac80211]
Do you have debug info that'd point to a code line?
I have never heard of this.
I don't actually know how to get a line of code out of those
hex offsets...
Someone told me many years ago..but I lost that information :P
Err, I never remember either, I think Luis knows the gdb thing ... I
usually use "objdump -dS"
gdb net/mac80211/mac80211.ko
l *(ieee80211_stop_tx_ba_session+0x14/0x84)
Oops I meant:
gdb net/mac80211/mac80211.ko
l *(ieee80211_stop_tx_ba_session+0x14)
Thank!
I had to re-compile with debugging symbols, and added kgdb (hopefully
that won't mess anything up).
Reading symbols from
/home/greearb/kernel/2.6/wireless-testing-dbg.p4s/net/mac80211/mac80211.ko...done.
(gdb) l *(ieee80211_stop_tx_ba_session+0x14)
0x54fe is in ieee80211_stop_tx_ba_session
(/home/greearb/git/linux.wireless-testing/net/mac80211/agg-tx.c:595).
590
591 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
592 {
593 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
594 struct ieee80211_sub_if_data *sdata = sta->sdata;
595 struct ieee80211_local *local = sdata->local;
596 struct tid_ampdu_tx *tid_tx;
597 int ret = 0;
598
599 trace_api_stop_tx_ba_session(pubsta, tid);
I'm not sure I quite got the hang of kgdb yet, but hoping to get that
working
and reproduce with it enabled...
I gave up on getting kgdb to work..seemed to cause more problems than
it fixed.
I did find a similar crash while debugging a kernel with just symbols
compiled in (not kgdb) though:
The interesting thing to me is that the 00100104 address is the same in
both crashes, though this one is in a different method.
Also, this is with power-save NOT disabled (I was hoping to
hit some debugging code I put in for the other crash..hit this instead.)
Oct 4 15:26:15 localhost kernel: BUG: unable to handle kernel paging request at 00100104
Oct 4 15:26:15 localhost kernel: IP: [<fc77e038>] cfg80211_unlink_bss+0x4d/0x8d [cfg80211]
Oct 4 15:26:15 localhost kernel: *pde = 00000000
Oct 4 15:26:15 localhost kernel: Oops: 0002 [#1] SMP
Oct 4 15:26:15 localhost kernel: last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:08:01.0/net/sta26/flags
Oct 4 15:26:15 localhost kernel: Modules linked in: michael_mic ath5k arc4 ath9k mac80211 ath9k_common ath9k_hw ath cfg80211 aes_i586 aes_generic 8021q garp
stp llc macvlan pktgen fuse nfs lockd fscache nfs_acl auth_rpcgss sunrpc ipv6 uinput ecb e1000e iTCO_wdt iTCO_vendor_support pcspkr i2c_i801 microcode i915
drm_kms_helper drm i2c_algo_bit i2c_core video output [last unloaded: ipt_addrtype]
Oct 4 15:26:15 localhost kernel:
Oct 4 15:26:15 localhost kernel: Pid: 41, comm: kworker/u:2 Not tainted 2.6.36-rc6-wl+ #4 PDSBM/PDSBM
Oct 4 15:26:15 localhost kernel: EIP: 0060:[<fc77e038>] EFLAGS: 00010282 CPU: 1
Oct 4 15:26:15 localhost kernel: EIP is at cfg80211_unlink_bss+0x4d/0x8d [cfg80211]
Oct 4 15:26:15 localhost kernel: EAX: 00200200 EBX: f2779424 ECX: 00100100 EDX: f2779400
Oct 4 15:26:15 localhost kernel: ESI: f53a0180 EDI: f53a0000 EBP: f73d3ec4 ESP: f73d3eb0
Oct 4 15:26:15 localhost kernel: DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Oct 4 15:26:15 localhost kernel: Process kworker/u:2 (pid: 41, ti=f73d2000 task=f71272d0 task.ti=f73d2000)
(gdb) l *(cfg80211_unlink_bss+0x4d)
0x405c is in cfg80211_unlink_bss (/home/greearb/git/linux.wireless-testing/include/linux/list.h:89).
84 * This is only for internal list manipulation where we know
85 * the prev/next entries already!
86 */
87 static inline void __list_del(struct list_head * prev, struct list_head * next)
88 {
89 next->prev = prev;
90 prev->next = next;
91 }
92
93 /**
Thanks,
Ben
--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc http://www.candelatech.com
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
