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Message-Id: <200810272151.01244.rjw@sisk.pl> Date: Mon, 27 Oct 2008 21:51:00 +0100 From: "Rafael J. Wysocki" <rjw@...k.pl> To: "Carlos R. Mafra" <crmafra2@...il.com> Cc: Johannes Berg <johannes@...solutions.net>, Soeren Sonnenburg <kernel@....de>, linux-kernel@...r.kernel.org, tomas.winkler@...el.com, "John W. Linville" <linville@...driver.com>, linux-wireless@...r.kernel.org Subject: Re: Suspend to RAM regression in 2.6.28-rc2 (bisected) On Monday, 27 of October 2008, Carlos R. Mafra wrote: > On Mon 27.Oct'08 at 20:13:43 +0100, Johannes Berg wrote: > > On Mon, 2008-10-27 at 20:11 +0100, Carlos R. Mafra wrote: > > > > > > Do you get any kernel messages output? If you do, could you put messages > > > > into each line of ieee80211_set_disassoc to see where it hangs? > > > > > > No messages appear, just a black screen. > > > > > > But I can use the SysRq keys, and when I umount the > > > screen shows the message that umount succeed. I also tried SysRq+t but > > > the messages appear to fast to read. > > > > Ok, but that means you _can_ get messages, it would help a lot if you > > could put a few printks into the set_disassoc function before/after each > > other function call, so we know where exactly it hangs. Pretty much all > > of them could possibly hang if there is some sort of locking error > > happening or anything relies on userspace to be running... > > Ok, I humbly tried to do that with the patch at the end of the email, > but I did not appear to hang in this function tough. > > Somehow I could get some messages printed when it was a black screen > before (I think it has to do with the debug level I set with SysRq...) > and I could see all the printks I've put there. > > The good thing is that I could get the complete syslog of the boot until > the it failed after suspending to RAM (in 2.6.28-rc2 with my debug patch > below applied). The last messages before the laptop become unresponsive > (except for the SysRq) were these ones: > > Oct 27 21:03:06 localhost kernel: Registered led device: iwl-phy0:radio > Oct 27 21:03:06 localhost kernel: Registered led device: iwl-phy0:assoc > Oct 27 21:03:06 localhost kernel: Registered led device: iwl-phy0:RX > Oct 27 21:03:06 localhost kernel: Registered led device: iwl-phy0:TX > Oct 27 21:03:06 localhost kernel: before rcu_read_lock > Oct 27 21:03:06 localhost kernel: before netif_tx_stop_all_queues > Oct 27 21:03:06 localhost kernel: before netif_carrier_off > Oct 27 21:03:06 localhost kernel: before ieee80211_sta > Oct 27 21:03:06 localhost kernel: inside sef_disconnected 1 > Oct 27 21:03:06 localhost kernel: before ieee8021_led_assoc > Oct 27 21:03:06 localhost kernel: before ieee8021_sta_send_apinfo > Oct 27 21:03:06 localhost kernel: before sta_info_unlink > Oct 27 21:03:06 localhost kernel: before rcu_read_unlock > Oct 27 21:03:06 localhost kernel: before sta_info_destroy > Oct 27 21:03:06 localhost kernel: sd 0:0:0:0: [sda] Starting disk > Oct 27 21:03:06 localhost kernel: ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) > Oct 27 21:03:06 localhost kernel: ata1.00: ACPI cmd ef/90:03:00:00:00:a0 succeeded > Oct 27 21:03:06 localhost kernel: ata1.00: ACPI cmd f5/00:00:00:00:00:a0 filtered out > Oct 27 21:03:06 localhost kernel: ata1.00: ACPI cmd ef/90:03:00:00:00:a0 succeeded > Oct 27 21:03:06 localhost kernel: ata1.00: ACPI cmd f5/00:00:00:00:00:a0 filtered out > Oct 27 21:03:06 localhost kernel: ata1.00: configured for UDMA/100 > Oct 27 21:03:06 localhost kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0x9 t4 > Oct 27 21:03:06 localhost kernel: ata1: irq_stat 0x00000040, connection status changed > Oct 27 21:03:06 localhost kernel: ata1: hard resetting link > Oct 27 21:03:06 localhost kernel: ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) > Oct 27 21:03:06 localhost kernel: ata1.00: ACPI cmd ef/90:03:00:00:00:a0 succeeded > Oct 27 21:03:06 localhost kernel: ata1.00: ACPI cmd f5/00:00:00:00:00:a0 filtered out > Oct 27 21:03:06 localhost kernel: ata1.00: ACPI cmd ef/90:03:00:00:00:a0 succeeded > Oct 27 21:03:06 localhost kernel: ata1.00: ACPI cmd f5/00:00:00:00:00:a0 filtered out > Oct 27 21:03:06 localhost kernel: ata1.00: configured for UDMA/100 > Oct 27 21:03:06 localhost kernel: ata1: EH complete > Oct 27 21:03:06 localhost kernel: sd 0:0:0:0: [sda] 488397168 512-byte hardware sectors: (250 GB/232 GiB) > Oct 27 21:03:06 localhost kernel: sd 0:0:0:0: [sda] Write Protect is off > Oct 27 21:03:06 localhost kernel: sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 > Oct 27 21:03:06 localhost kernel: sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA > Oct 27 21:03:06 localhost kernel: sd 0:0:0:0: [sda] 488397168 512-byte hardware sectors: (250 GB/232 GiB) > Oct 27 21:03:06 localhost kernel: sd 0:0:0:0: [sda] Write Protect is off > Oct 27 21:03:06 localhost kernel: sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 > Oct 27 21:03:06 localhost kernel: sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA > Oct 27 21:03:06 localhost kernel: Restarting tasks ... done. > Oct 27 21:03:07 localhost ifplugd(wlan0)[3182]: Link beat lost. > Oct 27 21:03:13 localhost ifplugd(wlan0)[3182]: Executing '/etc/ifplugd/ifplugd.action wlan0 down'. > Oct 27 21:06:20 localhost kernel: SysRq : Changing Loglevel > Oct 27 21:06:20 localhost kernel: Loglevel set to 4 > Oct 27 21:06:22 localhost kernel: SysRq : Changing Loglevel > Oct 27 21:06:22 localhost kernel: Loglevel set to 6 > Oct 27 21:06:32 localhost kernel: ffff80251670>] ? autoremove_wake_function+0x0/0x40 > Oct 27 21:06:32 localhost kernel: [<ffffffff8024e200>] ? worker_thread+0x0/0x110 > Oct 27 21:06:32 localhost kernel: [<ffffffff8025119d>] kthread+0x4d/0x80 > Oct 27 21:06:32 localhost kernel: [<ffffffff8020d1b9>] child_rip+0xa/0x11 > > and I have the complete trace also. I can try to put it somewhere in the web if it helps > (I already tried it, but I am new at the institute here and I could not set up my > webpage yet :-( Please attach it to http://bugzilla.kernel.org/show_bug.cgi?id=11845 . Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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