On Mon, 5 Mar 2007 14:26:30 -0800 [EMAIL PROTECTED] wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=8132 > > Summary: pptp server lockup in ppp_asynctty_receive() > Kernel Version: 2.6.20 > Status: NEW > Severity: high > Owner: [EMAIL PROTECTED] > Submitter: [EMAIL PROTECTED] > CC: [EMAIL PROTECTED] > > > Already several kernel releases i've expirienced different lockups of vpn > (pptp) server. > There is more then 200 ppp connections sometimes. > With kernel debug i was able to retrive next information: > > First: > Showing all locks held in the system: > 1 lock held by agetty/4486: > #0: (&tty->atomic_read_lock){--..}, at: [<c01d4e6f>] read_chan+0x41a/0x60b > 1 lock held by agetty/4487: > #0: (&tty->atomic_read_lock){--..}, at: [<c01d4e6f>] read_chan+0x41a/0x60b > 1 lock held by agetty/4488: > #0: (&tty->atomic_read_lock){--..}, at: [<c01d4e6f>] read_chan+0x41a/0x60b > 2 locks held by pptpctrl/4500: > #0: (&tty->atomic_write_lock){--..}, at: [<c01d0f8f>] tty_write+0x83/0x1d0 > #1: (&ap->recv_lock){....}, at: [<c02241fe>] > ppp_asynctty_receive+0x2e/0x710 > > ============================================= > BUG: spinlock lockup on CPU#1, pppd/4504, df5048c4 > [<c01c42c6>] _raw_spin_lock+0x100/0x134 > [<c0223f03>] ppp_async_ioctl+0xa7/0x1d0 > [<c0221b7c>] ppp_ioctl+0xa5/0xbff > [<c012f2a5>] down_read+0x29/0x3a > [<c0223e5c>] ppp_async_ioctl+0x0/0x1d0 > [<c0221ba5>] ppp_ioctl+0xce/0xbff > [<c029b78f>] _spin_unlock+0x14/0x1c > [<c014a22a>] do_wp_page+0x256/0x4ba > [<c014c1e9>] __handle_mm_fault+0x74e/0xa22 > [<c0167224>] do_ioctl+0x64/0x6d > [<c016727d>] vfs_ioctl+0x50/0x273 > [<c01674d4>] sys_ioctl+0x34/0x50 > [<c0102dae>] sysenter_past_esp+0x5f/0x99 > ======================= > BUG: soft lockup detected on CPU#0! > [<c013ce27>] softlockup_tick+0x8d/0xbc > [<c0123784>] update_process_times+0x28/0x5e > [<c010d9c4>] smp_apic_timer_interrupt+0x80/0x9c > [<c0103903>] apic_timer_interrupt+0x33/0x38 > [<c01c2e9d>] delay_tsc+0x9/0x13 > [<c01c2ed3>] __delay+0x6/0x7 > [<c01c426f>] _raw_spin_lock+0xa9/0x134 > [<c01d0f8f>] tty_write+0x83/0x1d0 > [<c01cf418>] tty_ldisc_try+0x2f/0x33 > [<c029bc8c>] lock_kernel+0x19/0x24 > [<c01d1017>] tty_write+0x10b/0x1d0 > [<c01d35cf>] write_chan+0x0/0x320 > [<c015d502>] vfs_write+0x87/0xf0 > [<c01d0f0c>] tty_write+0x0/0x1d0 > [<c015daa9>] sys_write+0x41/0x6a > [<c0102dae>] sysenter_past_esp+0x5f/0x99 > ======================= > > > Second) > <0>BUG: spinlock lockup on CPU#0, pppd/5209, de3e2884 > [<c01c42c6>] _raw_spin_lock+0x100/0x134 > BUG: spinlock lockup on CPU#1, ip-down/7524, c0353300 > [<c01c42c6>] _raw_spin_lock+0x100/0x134 > [<c029bc8c>] lock_kernel+0x19/0x24 > [<c015f234>] chrdev_open+0x8a/0x16e > [<c015f1aa>] chrdev_open+0x0/0x16e > [<c015ba94>] __dentry_open+0xaf/0x1a0 > [<c015bc12>] nameidata_to_filp+0x31/0x3a > [<c015bc54>] do_filp_open+0x39/0x40 > [<c029b78f>] _spin_unlock+0x14/0x1c > [<c015b9d4>] get_unused_fd+0xaa/0xbb > [<c015bc95>] do_sys_open+0x3a/0x6d > [<c015bd03>] sys_open+0x1c/0x20 > [<c0102dae>] sysenter_past_esp+0x5f/0x99 > ======================= > [<c0223f03>] ppp_async_ioctl+0xa7/0x1d0 > [<c0221b7c>] ppp_ioctl+0xa5/0xbff > [<c012f2a5>] down_read+0x29/0x3a > [<c0223e5c>] ppp_async_ioctl+0x0/0x1d0 > [<c0221ba5>] ppp_ioctl+0xce/0xbff > [<c029b78f>] _spin_unlock+0x14/0x1c > [<c014a22a>] do_wp_page+0x256/0x4ba > [<c014c1e9>] __handle_mm_fault+0x74e/0xa22 > [<c0167224>] do_ioctl+0x64/0x6d > [<c016727d>] vfs_ioctl+0x50/0x273 > [<c01674d4>] sys_ioctl+0x34/0x50 > [<c0102dae>] sysenter_past_esp+0x5f/0x99 > ======================= > > Third) > BUG: soft lockup detected on CPU#0! > [<c013ce27>] softlockup_tick+0x8d/0xbc > [<c0123784>] update_process_times+0x28/0x5e > [<c010d9c4>] smp_apic_timer_interrupt+0x80/0x9c > [<c0103903>] apic_timer_interrupt+0x33/0x38 > [<c01c2e9d>] delay_tsc+0x9/0x13 > [<c01c2ed3>] __delay+0x6/0x7 > [<c01c426f>] _raw_spin_lock+0xa9/0x134 > [<c01cf418>] tty_ldisc_try+0x2f/0x33 > [<c029bc8c>] lock_kernel+0x19/0x24 > [<c01d1984>] tty_read+0x5a/0xbe > [<c015d5f0>] vfs_read+0x85/0xee > [<c01d192a>] tty_read+0x0/0xbe > [<c015da3f>] sys_read+0x41/0x6a > [<c0102dae>] sysenter_past_esp+0x5f/0x99 > ======================= > BUG: soft lockup detected on CPU#0! > [<c013ce27>] softlockup_tick+0x8d/0xbc > [<c0123784>] update_process_times+0x28/0x5e > [<c010d9c4>] smp_apic_timer_interrupt+0x80/0x9c > [<c0103903>] apic_timer_interrupt+0x33/0x38 > [<c01c00d8>] prio_tree_insert+0xe8/0x23b > [<c01c4275>] _raw_spin_lock+0xaf/0x134 > [<c01cf418>] tty_ldisc_try+0x2f/0x33 > [<c029bc8c>] lock_kernel+0x19/0x24 > [<c01d1984>] tty_read+0x5a/0xbe > [<c015d5f0>] vfs_read+0x85/0xee > [<c01d192a>] tty_read+0x0/0xbe > [<c015da3f>] sys_read+0x41/0x6a > [<c0102dae>] sysenter_past_esp+0x5f/0x99 > > > Next via SysRq: > > Showing all locks held in the system: > 1 lock held by agetty/5057: > #0: (&tty->atomic_read_lock){--..}, at: [<c01d4e6f>] read_chan+0x41a/0x60b > 1 lock held by agetty/5058: > #0: (&tty->atomic_read_lock){--..}, at: [<c01d4e6f>] read_chan+0x41a/0x60b > 1 lock held by agetty/5059: > #0: (&tty->atomic_read_lock){--..}, at: [<c01d4e6f>] read_chan+0x41a/0x60b > 2 locks held by pptpctrl/5071: > #0: (&tty->atomic_write_lock){--..}, at: [<c01d0f8f>] tty_write+0x83/0x1d0 > #1: (&ap->recv_lock){....}, at: [<c02241fe>] > ppp_asynctty_receive+0x2e/0x710 > > > ~#SysRq : Show Blocked State > > free sibling > task PC stack pid father child younger older > pptpctrl D C02A18E0 0 5071 4646 5074 5094 5064 (L-TLB) > df3a3bd0 00000082 0029b837 c02a18e0 00000246 00000000 dd4f131c > dd563cac > def86030 c140864c 00000000 00000000 00000009 def86030 2ccaa8e5 > 0000017d > 3b9aca00 def8613c c1407cc0 00000000 006a9953 00000000 de8f503c > 00000046 > Call Trace: > [<c029b5b0>] __down+0x8c/0xf4 > [<c0116209>] default_wake_function+0x0/0xc > [<c029b397>] __down_failed+0x7/0xc > [<c0223de4>] ppp_asynctty_close+0x28/0x98 > [<c0223e4f>] ppp_asynctty_close+0x93/0x98 > [<c0223e59>] ppp_asynctty_hangup+0x5/0x8 > [<c01d0c8a>] do_tty_hangup+0x119/0x391 > [<c01d0612>] release_dev+0x154/0x69b > [<c0158a01>] poison_obj+0x20/0x3d > [<c0158a01>] poison_obj+0x20/0x3d > [<c0158c70>] cache_free_debugcheck+0xc7/0x1dd > [<c016ddd5>] destroy_inode+0x20/0x33 > [<c016c88c>] dput+0xd9/0x145 > [<c01d0b68>] tty_release+0xf/0x18 > [<c015dd96>] __fput+0x3c/0xe7 > [<c015b906>] filp_close+0x3e/0x62 > [<c011c73b>] put_files_struct+0xa5/0xb8 > [<c011d808>] do_exit+0x124/0x7e2 > [<c01e1710>] vgacon_set_cursor_size+0x2d/0xeb > [<c0104392>] do_trap+0x0/0xa9 > [<c0104bf5>] do_invalid_op+0x0/0xab > [<c0104c97>] do_invalid_op+0xa2/0xab > [<c024d1e4>] skb_under_panic+0x59/0x5d > [<c0113ecc>] __wake_up+0x32/0x43 > [<c011af94>] release_console_sem+0x22d/0x239 > [<c011b4f1>] vprintk+0x1fb/0x37c > [<c029bd4c>] error_code+0x7c/0x84 > [<c024d1e4>] skb_under_panic+0x59/0x5d > [<c02248a2>] ppp_asynctty_receive+0x6d2/0x710 > [<c02248b0>] ppp_asynctty_receive+0x6e0/0x710 > [<c01d5a09>] pty_write+0x39/0x41 > [<c01d37e1>] write_chan+0x212/0x320 > [<c0116209>] default_wake_function+0x0/0xc > [<c01d1028>] tty_write+0x11c/0x1d0 > [<c01d35cf>] write_chan+0x0/0x320 > [<c015d502>] vfs_write+0x87/0xf0 > [<c01d0f0c>] tty_write+0x0/0x1d0 > [<c015daa9>] sys_write+0x41/0x6a > [<c0102dae>] sysenter_past_esp+0x5f/0x99 > ======================= > > Dump registers > Pid: 13874, comm: pptpctrl > EIP: 0060:[<c01c2e94>] CPU: 0 > EIP is at delay_tsc+0x0/0x13 > EFLAGS: 00000246 Not tainted (2.6.20-gentoo #10) > EAX: 00000001 EBX: c0353300 ECX: f52a298e EDX: c799bc55 > ESI: 492d5b81 EDI: 00000000 EBP: 8eb4e7d4 DS: 007b ES: 007b GS: 00d8 > CR0: 8005003b CR2: b7e598b8 CR3: 0e6f3000 CR4: 000006d0 > [<c01c2ed3>] __delay+0x6/0x7 > [<c01c426f>] _raw_spin_lock+0xa9/0x134 > [<c01cf418>] tty_ldisc_try+0x2f/0x33 > [<c029bc8c>] lock_kernel+0x19/0x24 > [<c01d1984>] tty_read+0x5a/0xbe > [<c015d5f0>] vfs_read+0x85/0xee > [<c01d192a>] tty_read+0x0/0xbe > [<c015da3f>] sys_read+0x41/0x6a > [<c0102dae>] sysenter_past_esp+0x5f/0x99 > ======================= > > > Information about system: > sh scripts/ver_linux > If some fields are empty or look unusual you may have an old version. > Compare to the current minimal requirements in Documentation/Changes. > > Linux vpn2 2.6.20-gentoo #10 SMP Mon Mar 5 11:07:33 MSK 2007 i686 Intel(R) > Pentium(R) 4 CPU 2.40GHz GenuineIntel GNU/Linux > > Gnu C 4.1.2 > Gnu make 3.81 > binutils 2.17 > util-linux 2.12r > mount 2.12r > module-init-tools 3.2.2 > e2fsprogs 1.39 > reiserfsprogs 3.6.19 > PPP 2.4.4 > Linux C Library > libc.2.5 > Dynamic linker (ldd) 2.5 > Procps 3.2.7 > Net-tools 1.60 > Kbd 1.12 > Sh-utils 6.7 > udev 104 > Modules Loaded 8021q ipt_TCPMSS xt_tcpudp xt_pkttype iptable_filter > ip_tables x_tables i2c_i801 i2c_core >
This could be an interaction between the tty-layer locking changes and ppp? - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
