Re: new warning at net/wireless/util.c:1236
Hi, > Things still work, but when it starts warning, it generates a *lot* > of noise (I got 36 of these within about ten minutes). Yeah, that's kinda dumb - I just sent a patch to make that just warn once and actually report the configuration. > I have no idea what triggered it, because when I rebooted (not > because of this issue, but just to reboot into a newer kernel) I > don't see it again. That's odd. Perhaps you connected to a different wireless network on the next boot? I'm pretty sure I found the cause for this, and will send out a patch in a minute, but that wouldn't go away with a different kernel. johannes
Re: new warning at net/wireless/util.c:1236
On Thu, 2017-05-04 at 07:35 +0300, Kalle Valo wrote: > Linus Torvaldswrites: > > > So my Dell XPS 13 seems to have grown a new warning as of the > > networking merge yesterday. > > > > Things still work, but when it starts warning, it generates a *lot* of > > noise (I got 36 of these within about ten minutes). > > > > I have no idea what triggered it, because when I rebooted (not because > > of this issue, but just to reboot into a newer kernel) I don't see it > > again. > > > > This is all pretty regular wireless - it's intel 8260 wireless in a > > fairly normal laptop. > > > > Things still seem to *work* ok, so the only problem here is the overly > > verbose and useless WARN_ON. It doesn't even print out *which* rate it > > is warning about, it just does that stupid unconditional WARN_ON() > > without ever shutting up about it.. > > > > The WARN_ON() seems to be old, but my logs don't seem to have any > > mention of this until today, so there's something that has changed > > that now triggers it. > > > > Ideas? > > > > Linus > > > > --- > > > > WARNING: CPU: 3 PID: 1138 at net/wireless/util.c:1236 > > cfg80211_calculate_bitrate+0x139/0x170 [cfg80211] > > As this is with iwlwifi adding also Luca. There were some rate handling > changes in iwlwifi, like commit 77e409455f41, but don't know if that > could cause this. Thanks Kalle. I don't see anything in the iwlwifi driver that could be causing this. Johannes suspects some RX rate changes he made in mac80211... -- Luca.
Re: new warning at net/wireless/util.c:1236
Linus Torvaldswrites: > So my Dell XPS 13 seems to have grown a new warning as of the > networking merge yesterday. > > Things still work, but when it starts warning, it generates a *lot* of > noise (I got 36 of these within about ten minutes). > > I have no idea what triggered it, because when I rebooted (not because > of this issue, but just to reboot into a newer kernel) I don't see it > again. > > This is all pretty regular wireless - it's intel 8260 wireless in a > fairly normal laptop. > > Things still seem to *work* ok, so the only problem here is the overly > verbose and useless WARN_ON. It doesn't even print out *which* rate it > is warning about, it just does that stupid unconditional WARN_ON() > without ever shutting up about it.. > > The WARN_ON() seems to be old, but my logs don't seem to have any > mention of this until today, so there's something that has changed > that now triggers it. > > Ideas? > > Linus > > --- > > WARNING: CPU: 3 PID: 1138 at net/wireless/util.c:1236 > cfg80211_calculate_bitrate+0x139/0x170 [cfg80211] As this is with iwlwifi adding also Luca. There were some rate handling changes in iwlwifi, like commit 77e409455f41, but don't know if that could cause this. -- Kalle Valo
new warning at net/wireless/util.c:1236
So my Dell XPS 13 seems to have grown a new warning as of the networking merge yesterday. Things still work, but when it starts warning, it generates a *lot* of noise (I got 36 of these within about ten minutes). I have no idea what triggered it, because when I rebooted (not because of this issue, but just to reboot into a newer kernel) I don't see it again. This is all pretty regular wireless - it's intel 8260 wireless in a fairly normal laptop. Things still seem to *work* ok, so the only problem here is the overly verbose and useless WARN_ON. It doesn't even print out *which* rate it is warning about, it just does that stupid unconditional WARN_ON() without ever shutting up about it.. The WARN_ON() seems to be old, but my logs don't seem to have any mention of this until today, so there's something that has changed that now triggers it. Ideas? Linus --- WARNING: CPU: 3 PID: 1138 at net/wireless/util.c:1236 cfg80211_calculate_bitrate+0x139/0x170 [cfg80211] Modules linked in: rfcomm fuse ccm ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_broute bridge stp llc ebtable_nat ip6table_security ip6table_mangle ip6table_nat nf_con snd_hda_codec iwlmvm irqbypass snd_hwdep snd_hda_core intel_cstate mac80211 snd_seq intel_rapl_perf snd_seq_device snd_pcm iwlwifi rtsx_pci_ms snd_timer cfg80211 memstick snd soundcore i2c_i801 shpchp i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm i2c_hid video CPU: 3 PID: 1138 Comm: NetworkManager Tainted: GW 4.11.0-06543-g2f34c1231bfc #60 Hardware name: Dell Inc. XPS 13 9350/09JHRY, BIOS 1.4.13 12/28/2016 task: 9c1d1bfcbb80 task.stack: bb95c337c000 RIP: 0010:cfg80211_calculate_bitrate+0x139/0x170 [cfg80211] RSP: 0018:bb95c337f5b8 EFLAGS: 00010293 RAX: RBX: 9c1cb080cc00 RCX: RDX: 0005 RSI: 0002 RDI: bb95c337f76e RBP: bb95c337f5b8 R08: 0004 R09: 9c1cc36fe0c4 R10: f7c00472 R11: c0682000 R12: 9c1cc36fe0c0 R13: bb95c337f76e R14: R15: 9c1cc36fe030 FS: 7f15f980() GS:9c1d3ed8() knlGS: CS: 0010 DS: ES: CR0: 80050033 CR2: 7ffd1ae62748 CR3: 000469f4f000 CR4: 003406e0 Call Trace: nl80211_put_sta_rate+0x56/0x210 [cfg80211] nl80211_send_station.isra.63+0x639/0xd60 [cfg80211] nl80211_get_station+0x1e4/0x250 [cfg80211] genl_family_rcv_msg+0x1fa/0x3e0 genl_rcv_msg+0x4c/0x90 netlink_rcv_skb+0xde/0x110 genl_rcv+0x28/0x40 netlink_unicast+0x189/0x220 netlink_sendmsg+0x2ba/0x3b0 sock_sendmsg+0x38/0x50 ___sys_sendmsg+0x2b6/0x2d0 __sys_sendmsg+0x54/0x90 SyS_sendmsg+0x12/0x20 entry_SYSCALL_64_fastpath+0x13/0x94 RIP: 0033:0x7efffebf82fd RSP: 002b:7fff97d4af30 EFLAGS: 0293 ORIG_RAX: 002e RAX: ffda RBX: RCX: 7efffebf82fd RDX: RSI: 7fff97d4afc0 RDI: 0010 RBP: 7fff97d4b070 R08: R09: 7efffcc7b168 R10: 55eb69e6d110 R11: 0293 R12: 7fff97d4b0e0 R13: 0001 R14: R15: 55eb68a32760 Code: 89 d0 f7 e1 d1 ea 8d 14 92 01 d2 81 c2 50 c3 00 00 b9 c5 5a 7c 0a c1 ea 05 89 d0 f7 e1 5d 89 d0 c1 e8 07 c3 31 c0 80 f9 02 74 b7 <0f> ff 31 c0 eb b1 0f ff 31 c0 5d c3 0f ff 31 c0 5d c3 8d 04 40