Created attachment 3992 [details] /var/log/kernel/info (excerpt) 2.6.25-std-def-alt8.M41.5 firmware-iwl3945-2.14.1.5-alt1 02:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02) У меня на iwl3945 с одной стороны (и ipw2200 с другой) в ad-hoc сети теряется 36% пакетов (действительно, похоже на "ping замирает периодически" -- https://bugzilla.altlinux.org/show_bug.cgi?id=20360#c1): [root@localhost ~]# ping dell.local PING dell.local (169.254.178.30) 56(84) bytes of data. 64 bytes from dell.local (169.254.178.30): icmp_seq=1 ttl=64 time=7.47 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=2 ttl=64 time=3.38 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=3 ttl=64 time=1.95 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=4 ttl=64 time=3.72 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=5 ttl=64 time=1.98 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=7 ttl=64 time=1.95 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=8 ttl=64 time=1.98 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=15 ttl=64 time=1.69 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=16 ttl=64 time=1.51 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=17 ttl=64 time=1.42 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=18 ttl=64 time=1.51 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=19 ttl=64 time=1.50 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=20 ttl=64 time=1.51 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=22 ttl=64 time=2.85 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=23 ttl=64 time=1.51 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=24 ttl=64 time=1.42 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=25 ttl=64 time=1.21 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=31 ttl=64 time=1.28 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=32 ttl=64 time=2.58 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=33 ttl=64 time=2.56 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=35 ttl=64 time=1.19 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=37 ttl=64 time=1.13 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=38 ttl=64 time=1.13 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=39 ttl=64 time=2.63 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=40 ttl=64 time=2.10 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=41 ttl=64 time=1.12 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=46 ttl=64 time=128 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=47 ttl=64 time=1.04 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=48 ttl=64 time=2.48 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=49 ttl=64 time=2.59 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=51 ttl=64 time=1.03 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=52 ttl=64 time=1.05 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=53 ttl=64 time=1.06 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=55 ttl=64 time=1.12 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=56 ttl=64 time=2.47 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=57 ttl=64 time=0.730 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=58 ttl=64 time=2.10 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=59 ttl=64 time=0.725 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=62 ttl=64 time=0.934 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=63 ttl=64 time=0.732 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=64 ttl=64 time=0.647 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=65 ttl=64 time=0.722 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=66 ttl=64 time=2.12 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=67 ttl=64 time=0.729 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=68 ttl=64 time=0.649 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=69 ttl=64 time=2.16 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=70 ttl=64 time=0.673 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=71 ttl=64 time=0.628 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=72 ttl=64 time=0.654 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=77 ttl=64 time=0.680 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=78 ttl=64 time=0.659 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=80 ttl=64 time=2.09 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=82 ttl=64 time=2.13 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=83 ttl=64 time=0.673 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=84 ttl=64 time=0.664 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=85 ttl=64 time=0.685 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=86 ttl=64 time=2.21 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=92 ttl=64 time=0.712 ms 64 bytes from dell.local (169.254.178.30): icmp_seq=93 ttl=64 time=0.687 ms ^C --- dell.local ping statistics --- 93 packets transmitted, 59 received, 36% packet loss, time 92285ms rtt min/avg/max/mdev = 0.628/3.756/128.932/16.472 ms [root@localhost ~]# при этом пишется куча сообщений на стороне iwl3945: kernel: wlan0: Configured IBSS beacon template kernel: phy0: Adding new IBSS station .... (дальше MAC или что-то подобное) несколько штук в секунду. Я подозреваю, что может быть связь между такой интенсивностью сообщений и тем, что оно нормально не работает. Сообщения (за час) приложены. [root@localhost ~]# iwconfig lo no wireless extensions. yauza no wireless extensions. wmaster0 no wireless extensions. wtibet IEEE 802.11 ESSID:"tibet" Mode:Ad-Hoc Frequency:2.412 GHz Cell: BA:C0:73:88:76:9B Tx-Power=15 dBm Retry min limit:7 RTS thr:off Fragment thr=2352 B Encryption key:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 [root@localhost ~]# iwlist scan lo Interface doesn't support scanning. yauza Interface doesn't support scanning. wmaster0 Interface doesn't support scanning. wtibet Interface doesn't support scanning : Resource temporarily unavailable [root@localhost ~]# (Раньше я мог предположить, что это может быть как-то связано и с NetworkManager -- https://bugzilla.altlinux.org/show_bug.cgi?id=18342#c3 , но теперь NetworkManager я удалил; ещё я видел сходства с https://bugzilla.altlinux.org/show_bug.cgi?id=20360 " слишком много сообщений в syslog", но там всё же другая проблема, как видно.)
This problem is not present in 2.6.30-std-def-alt14 from Sisyphus.
С #18342 у меня было подозрение, что проблема в периодическом сканировании, которое инициирует NM, но раз проблема сохраняется и без NM, то дело видимо не в этом. Проблема с #18342 исчезла с обновлением ядра, насколько я понимаю. Видимо проблема в драйвере.
Проверьте на современных бранчах.
