I suppose, that result of previous attempt is not very useful, because something is missed in the output (after "of" word). So, i rewrite your patch a little: [..] + printk(KERN_DEBUG "%s: refcount of %p (%s, num=%d, mag=%d, flags=%d) is still %d\n", + __func__, + tty->ldisc->ops, tty->ldisc->ops->name, tty->ldisc->ops->num, tty->ldisc->ops->magic, tty->ldisc->ops->flags, + atomic_read(&tty->ldisc->users)); [..]
And here is the output from this patch: [ 59.693814] apm: BIOS not found. [ 59.853081] [drm] nouveau 0000:01:00.0: nouveau_channel_free: freeing fifo 2 [ 83.736104] tty_ldisc_reinit: refcount of c13c7878 (n_tty, num=0, mag=21507, flags=0) is still 2 [ 84.094367] Bluetooth: L2CAP ver 2.14 [ 84.094372] Bluetooth: L2CAP socket layer initialized [ 84.130202] Bluetooth: RFCOMM TTY layer initialized [ 84.130210] Bluetooth: RFCOMM socket layer initialized [ 84.130215] Bluetooth: RFCOMM ver 1.11 [ 86.090140] input: ACPI Virtual Keyboard Device as /devices/virtual/input/input11 [ 86.244260] apm: BIOS not found. [ 86.683605] Registered led device: iwl-phy0::radio [ 86.683619] Registered led device: iwl-phy0::assoc [ 86.683631] Registered led device: iwl-phy0::RX [ 86.683643] Registered led device: iwl-phy0::TX [ 86.755718] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 86.756950] [drm] nouveau 0000:01:00.0: Allocating FIFO number 2 [ 86.763668] [drm] nouveau 0000:01:00.0: nouveau_channel_alloc: initialised FIFO 2 13 октября 2011 г. 18:41 пользователь Дмитрий Матросов <sgf....@gmail.com> написал: > I try to compile with printk() instead of printk_ratelimited() in your > patch, and it's succeeded. Then i install it with > > # dpkg -i ./linux-image-2.6.32-5-686-bigmem_2.6.32-38a~test_i386.deb > # dpkg --configure --force-depends-version linux-image-2.6.32-5-686-bigmem > > and then try to reproduce this bug. Here is the result: > > [ 65.162361] apm: BIOS not found. > [ 65.276280] [drm] nouveau 0000:01:00.0: nouveau_channel_free: freeing fifo > 2 > [ 84.368180] tty_ldisc_reinit: refcount of is still 2 > [ 85.134084] Bluetooth: L2CAP ver 2.14 > [ 85.134089] Bluetooth: L2CAP socket layer initialized > [ 85.179597] Bluetooth: RFCOMM TTY layer initialized > [ 85.179605] Bluetooth: RFCOMM socket layer initialized > [ 85.179610] Bluetooth: RFCOMM ver 1.11 > [ 86.928111] input: ACPI Virtual Keyboard Device as > /devices/virtual/input/input11 > [ 87.012983] apm: BIOS not found. > [ 87.386813] Registered led device: iwl-phy0::radio > [ 87.386854] Registered led device: iwl-phy0::assoc > [ 87.386894] Registered led device: iwl-phy0::RX > [ 87.386931] Registered led device: iwl-phy0::TX > [ 87.467491] ADDRCONF(NETDEV_UP): wlan0: link is not ready > [ 87.566675] [drm] nouveau 0000:01:00.0: Allocating FIFO number 2 > [ 87.573771] [drm] nouveau 0000:01:00.0: nouveau_channel_alloc: > initialised FIFO 2 > > > 13 октября 2011 г. 16:41 пользователь Дмитрий Матросов > <sgf....@gmail.com> написал: >> 2011/10/13 Ben Hutchings <b...@decadent.org.uk>: >>> On Wed, 2011-10-12 at 14:05 +0300, Matrosov Dmitriy wrote: >>>> Package: linux-2.6 >>>> Version: 2.6.32-38 >>>> Severity: normal >>>> Tags: squeeze >>>> >>>> Steps to reproduce: >>>> 1. Reboot computer. >>>> 2. Boot into runlevel 2. >>>> 3. Switch to console and go to single-user runlevel: >>>> # telinit 1 >>>> 4. Enter root password and switch to runlevel 2 again: >>>> # telinit 2 >>>> 5. And now, as i understand, second init copy (which run by telinit) will >>>> crash. >>>> >>>> I can't reproduce this again without rebooting system, i.e. it occurs only >>>> after reboot and only once. >>>> Also, i can't reproduce this with previous kernel (=2.6.32-35squeeze2), >>>> and, >>>> though, i don't sure that this is kernel bug, but it seems, like last >>>> kernel >>>> upgrade (=2.6.32-38) triggers it. >>> >>> This isn't a crash. >>> >>> [...] >>>> [ 75.608119] ------------[ cut here ]------------ >>>> [ 75.608136] WARNING: at >>>> /build/buildd-linux-2.6_2.6.32-38-i386-G9QRBd/linux-2.6-2.6.32/debian/build/source_i386_none/drivers/char/tty_ldisc.c:738 >>>> tty_ldisc_reinit+0x3e/0x6c() >>>> [ 75.608144] Hardware name: 6460EDG >>>> [ 75.608148] Modules linked in: acpi_cpufreq cpufreq_stats >>>> cpufreq_powersave cpufreq_conservative cpufreq_userspace pppoe pppox >>>> ppp_generic slhc binfmt_misc uinput fuse ipt_REJECT ipt_LOG xt_limit >>>> xt_tcpudp xt_state iptable_filter ipt_MASQUERADE iptable_nat nf_nat >>>> nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 iptable_mangle ip_tables >>>> x_tables ext3 jbd ext2 tp_smapi thinkpad_ec loop firewire_sbp2 >>>> snd_hda_codec_analog btusb snd_hda_intel bluetooth arc4 snd_hda_codec sg >>>> snd_hwdep ecb iwlagn snd_pcm nouveau iwlcore sr_mod sdhci_pci sdhci ttm >>>> snd_seq mac80211 snd_timer firewire_ohci cdrom drm_kms_helper >>>> snd_seq_device joydev firewire_core mmc_core cfg80211 drm pcmcia >>>> yenta_socket snd thinkpad_acpi soundcore rsrc_nonstatic i2c_algo_bit >>>> i2c_i801 wmi uhci_hcd pcmcia_core ricoh_mmc crc_itu_t snd_page_alloc >>>> ehci_hcd i2c_core ata_piix ata_generic e1000e rfkill led_class nvram >>>> usbcore nls_base processor button ac battery psmouse evdev pcspkr video >>>> output serio_raw ext4 mbcache jbd2 crc >>>> 16 dm_mod sd_mod crc_t10dif ahci libata scsi_mod thermal thermal_sys >>>> [last unloaded: kvm] >>>> [ 75.608352] Pid: 2422, comm: init Not tainted 2.6.32-5-686-bigmem #1 >>>> [ 75.608357] Call Trace: >>>> [ 75.608369] [<c1036819>] ? warn_slowpath_common+0x5e/0x8a >>>> [ 75.608378] [<c103684f>] ? warn_slowpath_null+0xa/0xc >>>> [ 75.608386] [<c11a38b9>] ? tty_ldisc_reinit+0x3e/0x6c >>>> [ 75.608394] [<c11a39d6>] ? tty_ldisc_hangup+0xef/0x172 >>>> [ 75.608403] [<c10a5c14>] ? remove_vma+0x43/0x48 >>>> [ 75.608413] [<c119e136>] ? do_tty_hangup+0xd0/0x2b1 >>>> [ 75.608422] [<c119e60d>] ? disassociate_ctty+0x3b/0x1b3 >>>> [ 75.608430] [<c103961a>] ? do_exit+0x212/0x5cd >>>> [ 75.608439] [<c1039a34>] ? do_group_exit+0x5f/0x82 >>>> [ 75.608449] [<c10449bf>] ? get_signal_to_deliver+0x30d/0x32e >>>> [ 75.608459] [<c10075b4>] ? do_notify_resume+0x6f/0x713 >>>> [ 75.608469] [<c110a800>] ? security_task_wait+0xc/0xd >>>> [ 75.608478] [<c103902e>] ? wait_consider_task+0x983/0x990 >>>> [ 75.608488] [<c104a804>] ? remove_wait_queue+0xb/0x2f >>>> [ 75.608496] [<c10391ea>] ? do_wait+0x1af/0x1e3 >>>> [ 75.608504] [<c10392b6>] ? sys_wait4+0x98/0xa2 >>>> [ 75.608514] [<c1037c44>] ? child_wait_callback+0x0/0x5f >>>> [ 75.608522] [<c10392d3>] ? sys_waitpid+0x13/0x17 >>>> [ 75.608530] [<c10082f4>] ? work_notifysig+0x13/0x1b >>>> [ 75.608536] ---[ end trace a550edb008c670a3 ]--- >>> [...]. >>> >>> This warning message was added by the bug fix "TTY: ldisc, do not close >>> until there are readers". I don't believe that the warning a >>> regression; it's just reporting a problem that already existed. >>> >>> If you would like to help us understand and fix the problem, please can >>> you test the attached patch, following the instructions at >>> <http://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s-common-official>. >>> It should replace the warnings with log lines of the form >>> "tty_ldisc_reinit: refcount of <name> is still <number>" which you >>> should send back. >>> >>> Ben. >>> >>> -- >>> Ben Hutchings >>> Quantity is no substitute for quality, but it's the only one we've got. >>> >> >> Hi, Ben. >> >> I am not sure, that i do all correctly, but it doesn't compile. Here >> is what i get >> >> $ apt-get source linux-2.6=2.6.32-38 >> $ cd linux-2.6-2.6.32/ >> $ bash debian/bin/test-patches ../0001-TTY-tty_ldisc_wait_idle-debug.patch >> [...] >> CC [M] drivers/bluetooth/btmrvl_sdio.o >> LD drivers/cdrom/built-in.o >> CC [M] drivers/cdrom/cdrom.o >> CC drivers/char/mem.o >> CC drivers/char/random.o >> CC drivers/char/tty_io.o >> CC drivers/char/n_tty.o >> CC drivers/char/tty_ioctl.o >> CC drivers/char/tty_ldisc.o >> /home/sgf/Documents/kernel/src/test_patch/linux-2.6-2.6.32/debian/build/source_i386_none/drivers/char/tty_ldisc.c: >> In function ‘tty_ldisc_reinit’: >> /home/sgf/Documents/kernel/src/test_patch/linux-2.6-2.6.32/debian/build/source_i386_none/drivers/char/tty_ldisc.c:742: >> error: implicit declaration of function ‘printk_ratelimited’ >> make[6]: *** [drivers/char/tty_ldisc.o] Error 1 >> make[5]: *** [drivers/char] Error 2 >> make[4]: *** [drivers] Error 2 >> make[3]: *** [sub-make] Error 2 >> make[2]: *** [all] Error 2 >> make[2]: Leaving directory >> `/home/sgf/Documents/kernel/src/test_patch/linux-2.6-2.6.32/debian/build/build_i386_none_686-bigmem' >> make[1]: *** [debian/stamps/build_i386_none_686-bigmem_plain] Error 2 >> make[1]: Leaving directory >> `/home/sgf/Documents/kernel/src/test_patch/linux-2.6-2.6.32' >> make: *** [binary-arch_i386_none_686-bigmem_real] Error 2 >> >> Dmitriy Matrosov. >> > -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". 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