* Fw: [Bug 54601] New: PPP regression on 3.2.39 stop work need restart server ont version 3.2.21 not found this problem.
@ 2013-03-01 16:47 Stephen Hemminger
2013-03-04 22:48 ` Ben Hutchings
0 siblings, 1 reply; 3+ messages in thread
From: Stephen Hemminger @ 2013-03-01 16:47 UTC (permalink / raw)
To: netdev
Begin forwarded message:
Date: Fri, 1 Mar 2013 01:24:14 -0800
From: "bugzilla-daemon@bugzilla.kernel.org" <bugzilla-daemon@bugzilla.kernel.org>
To: "stephen@networkplumber.org" <stephen@networkplumber.org>
Subject: [Bug 54601] New: PPP regression on 3.2.39 stop work need restart server ont version 3.2.21 not found this problem.
https://bugzilla.kernel.org/show_bug.cgi?id=54601
Summary: PPP regression on 3.2.39 stop work need restart server
ont version 3.2.21 not found this problem.
Product: Networking
Version: 2.5
Kernel Version: 3.2.39
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: Other
AssignedTo: shemminger@linux-foundation.org
ReportedBy: micron10@gmail.com
Regression: Yes
Hi
watch a problem with PPP after upgrade to version 3.2.39 ppp service stop work
2 hours after start with this crash :
[79619.180026] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 562
[79629.320074] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 529
[79639.460103] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 506
[79649.600071] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 486
[79659.740092] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 465
[79669.880014] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 444
[79680.020065] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 422
[79690.160111] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 402
[79700.300077] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 379
[79710.440018] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 355
[79720.580031] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 334
[79730.720082] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 313
[79740.860050] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 291
[79751.000030] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 268
[79761.140024] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 247
[79771.280201] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 223
[79781.420028] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 202
[79791.560098] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 180
[79801.700042] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 159
[79804.410096] INFO: task pppd:31852 blocked for more than 120 seconds.
[79804.410098] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[79804.410101] pppd D ffff88015fd0cd00 0 31852 31800 0x00000004
[79804.410111] ffff88010b69d600 0000000000000086 ffff88010b69d600
ffffffff8166e800
[79804.410114] ffff880159120ac0 0000000000004000 ffff88010ba75fd8
ffff88010ba75fd8
[79804.410117] 0000000000000246 ffffffff8166e800 000280da8107f173
0000000000000000
[79804.410119] Call Trace:
[79804.410128] [<ffffffff81082108>] ? release_pages+0x1d8/0x200
[79804.410150] [<ffffffff8107a0de>] ? find_get_pages+0x2e/0x120
[79804.410155] [<ffffffff811802b3>] ? cpumask_any_but+0x23/0x40
[79804.410167] [<ffffffff814831b8>] ? __mutex_lock_slowpath+0xc8/0x140
[79804.410170] [<ffffffff810218c5>] ? ptep_set_access_flags+0x25/0x30
[79804.410172] [<ffffffff81482d3a>] ? mutex_lock+0x1a/0x40
[79804.410176] [<ffffffffa0008624>] ? ppp_ioctl+0x2f4/0xf20 [ppp_generic]
[79804.410178] [<ffffffff8101e2b8>] ? do_page_fault+0x198/0x460
[79804.410181] [<ffffffff810c28be>] ? dput+0x1e/0x190
[79804.410190] [<ffffffff810be1bf>] ? do_vfs_ioctl+0x8f/0x530
[79804.410193] [<ffffffff810be6a9>] ? sys_ioctl+0x49/0x80
[79804.410195] [<ffffffff814848bb>] ? system_call_fastpath+0x16/0x1b
[79804.410198] INFO: task pppd:31869 blocked for more than 120 seconds.
[79804.410199] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[79804.410201] pppd D ffff88015fc0cd00 0 31869 31800 0x00000004
[79804.410203] ffff88014b1deb80 0000000000000082 ffff88014b1deb80
ffffffff8166e800
[79804.410206] ffff8801591250a0 0000000000004000 ffff88015829ffd8
ffff88015829ffd8
[79804.410209] 0000000000000246 ffffffff8166e800 000280da8107f173
0000000000000000
[79804.410212] Call Trace:
[79804.410214] [<ffffffff81082108>] ? release_pages+0x1d8/0x200
[79804.410216] [<ffffffff8107a0de>] ? find_get_pages+0x2e/0x120
[79804.410218] [<ffffffff811802b3>] ? cpumask_any_but+0x23/0x40
[79804.410221] [<ffffffff814831b8>] ? __mutex_lock_slowpath+0xc8/0x140
[79804.410223] [<ffffffff810218c5>] ? ptep_set_access_flags+0x25/0x30
[79804.410226] [<ffffffff81482d3a>] ? mutex_lock+0x1a/0x40
[79804.410228] [<ffffffffa0008624>] ? ppp_ioctl+0x2f4/0xf20 [ppp_generic]
[79804.410249] [<ffffffff8101e2b8>] ? do_page_fault+0x198/0x460
[79804.410251] [<ffffffff810c28be>] ? dput+0x1e/0x190
[79804.410253] [<ffffffff810be1bf>] ? do_vfs_ioctl+0x8f/0x530
[79804.410256] [<ffffffff810be6a9>] ? sys_ioctl+0x49/0x80
[79804.410258] [<ffffffff814848bb>] ? system_call_fastpath+0x16/0x1b
[79804.410260] INFO: task pppd:31889 blocked for more than 120 seconds.
[79804.410261] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[79804.410262] pppd D ffff88015fc0cd00 0 31889 31800 0x00000000
[79804.410275] ffff880159868ac0 0000000000000086 ffff880159868ac0
ffffffff8166e800
[79804.410277] ffff8801599ab060 0000000000004000 ffff88014ba51fd8
ffff88014ba51fd8
[79804.410280] 0000000000000246 ffffffff8166e800 000280da8107f173
0000000000000000
[79804.410290] Call Trace:
[79804.410292] [<ffffffff81082108>] ? release_pages+0x1d8/0x200
[79804.410295] [<ffffffff8107a0de>] ? find_get_pages+0x2e/0x120
[79804.410297] [<ffffffff811802b3>] ? cpumask_any_but+0x23/0x40
[79804.410300] [<ffffffff814831b8>] ? __mutex_lock_slowpath+0xc8/0x140
[79804.410302] [<ffffffff810218c5>] ? ptep_set_access_flags+0x25/0x30
[79804.410305] [<ffffffff81482d3a>] ? mutex_lock+0x1a/0x40
[79804.410318] [<ffffffffa0008624>] ? ppp_ioctl+0x2f4/0xf20 [ppp_generic]
[79804.410321] [<ffffffff8101e2b8>] ? do_page_fault+0x198/0x460
[79804.410322] [<ffffffff810c28be>] ? dput+0x1e/0x190
[79804.410325] [<ffffffff810be1bf>] ? do_vfs_ioctl+0x8f/0x530
[79804.410327] [<ffffffff810be6a9>] ? sys_ioctl+0x49/0x80
[79804.410330] [<ffffffff814848bb>] ? system_call_fastpath+0x16/0x1b
[79804.410334] INFO: task pppd:31890 blocked for more than 120 seconds.
[79804.410335] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[79804.410337] pppd D ffff88015fd0cd00 0 31890 31800 0x00000000
[79804.410339] ffff88015986cb40 0000000000000082 ffff88015986cb40
ffffffff8166e800
[79804.410342] ffff8801599adb60 0000000000004000 ffff8801079d7fd8
ffff8801079d7fd8
[79804.410345] 0000000000000246 ffffffff8166e800 000280da8107f173
0000000000000000
[79804.410347] Call Trace:
[79804.410349] [<ffffffff81082108>] ? release_pages+0x1d8/0x200
[79804.410352] [<ffffffff810b94a7>] ? link_path_walk+0x67/0x850
[79804.410354] [<ffffffff8107a0de>] ? find_get_pages+0x2e/0x120
[79804.410368] [<ffffffff811802b3>] ? cpumask_any_but+0x23/0x40
[79804.410390] [<ffffffff814831b8>] ? __mutex_lock_slowpath+0xc8/0x140
[79804.410392] [<ffffffff810218c5>] ? ptep_set_access_flags+0x25/0x30
[79804.410394] [<ffffffff81482d3a>] ? mutex_lock+0x1a/0x40
[79804.410397] [<ffffffffa0008624>] ? ppp_ioctl+0x2f4/0xf20 [ppp_generic]
[79804.410399] [<ffffffff8101e2b8>] ? do_page_fault+0x198/0x460
[79804.410401] [<ffffffff810c28be>] ? dput+0x1e/0x190
[79804.410403] [<ffffffff810be1bf>] ? do_vfs_ioctl+0x8f/0x530
[79804.410407] [<ffffffff81009f94>] ? fpu_finit+0x14/0x30
[79804.410409] [<ffffffff810be6a9>] ? sys_ioctl+0x49/0x80
[79804.410411] [<ffffffff814848bb>] ? system_call_fastpath+0x16/0x1b
[79804.410413] INFO: task pppd:31897 blocked for more than 120 seconds.
[79804.410414] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[79804.410419] pppd D ffff88015fd0cd00 0 31897 31800 0x00000004
[79804.410421] ffff88014b1deb80 0000000000000082 ffff88014b1deb80
ffffffff8166e800
[79804.410424] ffff88015901cb40 0000000000004000 ffff8801106dffd8
ffff8801106dffd8
[79804.410427] 0000000000000246 ffffffff8166e800 000280da8107f173
0000000000000000
[79804.410430] Call Trace:
[79804.410432] [<ffffffff81082108>] ? release_pages+0x1d8/0x200
[79804.410435] [<ffffffff8107a0de>] ? find_get_pages+0x2e/0x120
[79804.410437] [<ffffffff811802b3>] ? cpumask_any_but+0x23/0x40
[79804.410440] [<ffffffff814831b8>] ? __mutex_lock_slowpath+0xc8/0x140
[79804.410442] [<ffffffff810218c5>] ? ptep_set_access_flags+0x25/0x30
[79804.410444] [<ffffffff81482d3a>] ? mutex_lock+0x1a/0x40
[79804.410447] [<ffffffffa0008624>] ? ppp_ioctl+0x2f4/0xf20 [ppp_generic]
[79804.410453] [<ffffffff8101e2b8>] ? do_page_fault+0x198/0x460
[79804.410455] [<ffffffff810c28be>] ? dput+0x1e/0x190
[79804.410457] [<ffffffff810be1bf>] ? do_vfs_ioctl+0x8f/0x530
[79804.410459] [<ffffffff810be6a9>] ? sys_ioctl+0x49/0x80
[79804.410461] [<ffffffff814848bb>] ? system_call_fastpath+0x16/0x1b
[79804.410474] INFO: task pppd:31929 blocked for more than 120 seconds.
[79804.410476] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[79804.410477] pppd D ffff88015fc0cd00 0 31929 31800 0x00000004
[79804.410480] ffff88014b1deb80 0000000000000086 ffff88014b1deb80
ffffffff8166e800
[79804.410483] ffff88014b192b00 0000000000004000 ffff88010d6fdfd8
ffff88010d6fdfd8
[79804.410486] 0000000000000246 ffffffff8166e800 000280da8107f173
0000000000000000
[79804.410488] Call Trace:
[79804.410490] [<ffffffff81082108>] ? release_pages+0x1d8/0x200
[79804.410493] [<ffffffff810b94a7>] ? link_path_walk+0x67/0x850
[79804.410495] [<ffffffff811802b3>] ? cpumask_any_but+0x23/0x40
[79804.410498] [<ffffffff814831b8>] ? __mutex_lock_slowpath+0xc8/0x140
[79804.410500] [<ffffffff810218c5>] ? ptep_set_access_flags+0x25/0x30
[79804.410502] [<ffffffff81482d3a>] ? mutex_lock+0x1a/0x40
[79804.410505] [<ffffffffa0008624>] ? ppp_ioctl+0x2f4/0xf20 [ppp_generic]
[79804.410507] [<ffffffff8101e2b8>] ? do_page_fault+0x198/0x460
[79804.410509] [<ffffffff810c28be>] ? dput+0x1e/0x190
[79804.410511] [<ffffffff810be1bf>] ? do_vfs_ioctl+0x8f/0x530
[79804.410513] [<ffffffff810be6a9>] ? sys_ioctl+0x49/0x80
[79804.410515] [<ffffffff814848bb>] ? system_call_fastpath+0x16/0x1b
[79804.410517] INFO: task pppd:31964 blocked for more than 120 seconds.
[79804.410519] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[79804.410520] pppd D 0000000000000000 0 31964 31800 0x00000004
[79804.410522] ffffffff8160b020 0000000000000086 ffffffff8107e2a9
ffffffff8166e800
[79804.410525] ffff8801591260c0 0000000000004000 ffff88010b605fd8
ffff88010b605fd8
[79804.410528] 0000000000000246 ffffffff8166e800 000280da8107f173
0000000000000000
[79804.410530] Call Trace:
[79804.410533] [<ffffffff8107e2a9>] ? __alloc_pages_nodemask+0x109/0x7c0
[79804.410540] [<ffffffff81082108>] ? release_pages+0x1d8/0x200
[79804.410542] [<ffffffff8107a0de>] ? find_get_pages+0x2e/0x120
[79804.410544] [<ffffffff811802b3>] ? cpumask_any_but+0x23/0x40
[79804.410547] [<ffffffff814831b8>] ? __mutex_lock_slowpath+0xc8/0x140
[79804.410549] [<ffffffff810218c5>] ? ptep_set_access_flags+0x25/0x30
[79804.410551] [<ffffffff81482d3a>] ? mutex_lock+0x1a/0x40
[79804.410554] [<ffffffffa0008624>] ? ppp_ioctl+0x2f4/0xf20 [ppp_generic]
[79804.410556] [<ffffffff8101e2b8>] ? do_page_fault+0x198/0x460
[79804.410558] [<ffffffff810c28be>] ? dput+0x1e/0x190
[79804.410560] [<ffffffff810be1bf>] ? do_vfs_ioctl+0x8f/0x530
[79804.410562] [<ffffffff810be6a9>] ? sys_ioctl+0x49/0x80
[79804.410564] [<ffffffff814848bb>] ? system_call_fastpath+0x16/0x1b
[79804.410566] INFO: task pppd:31993 blocked for more than 120 seconds.
[79804.410568] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[79804.410579] pppd D 0000000000000000 0 31993 31800 0x00000004
[79804.410582] ffffffff8160b020 0000000000000082 ffffffff8107e2a9
ffffffff8166e800
[79804.410585] ffff8801590eb5c0 0000000000004000 ffff880107981fd8
ffff880107981fd8
[79804.410588] 0000000000000246 ffffffff8166e800 000280da8107f173
0000000000000000
[79804.410590] Call Trace:
[79804.410593] [<ffffffff8107e2a9>] ? __alloc_pages_nodemask+0x109/0x7c0
[79804.410595] [<ffffffff81082108>] ? release_pages+0x1d8/0x200
[79804.410597] [<ffffffff810b94a7>] ? link_path_walk+0x67/0x850
[79804.410599] [<ffffffff8107a0de>] ? find_get_pages+0x2e/0x120
[79804.410601] [<ffffffff811802b3>] ? cpumask_any_but+0x23/0x40
[79804.410604] [<ffffffff814831b8>] ? __mutex_lock_slowpath+0xc8/0x140
[79804.410606] [<ffffffff810218c5>] ? ptep_set_access_flags+0x25/0x30
[79804.410608] [<ffffffff81482d3a>] ? mutex_lock+0x1a/0x40
[79804.410611] [<ffffffffa0008624>] ? ppp_ioctl+0x2f4/0xf20 [ppp_generic]
[79804.410613] [<ffffffff8101e2b8>] ? do_page_fault+0x198/0x460
[79804.410615] [<ffffffff810c28be>] ? dput+0x1e/0x190
[79804.410617] [<ffffffff810be1bf>] ? do_vfs_ioctl+0x8f/0x530
[79804.410619] [<ffffffff810be6a9>] ? sys_ioctl+0x49/0x80
[79804.410624] [<ffffffff814848bb>] ? system_call_fastpath+0x16/0x1b
[79804.410626] INFO: task pppd:31994 blocked for more than 120 seconds.
[79804.410627] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[79804.410628] pppd D ffff88015fd0cd00 0 31994 31800 0x00000000
[79804.410631] ffff88015986cb40 0000000000000082 ffff88015986cb40
ffffffff8166e800
[79804.410634] ffff8801590eab00 0000000000004000 ffff880156d41fd8
ffff880156d41fd8
[79804.410637] 0000000000000246 ffffffff8166e800 000280da8107f173
0000000000000000
[79804.410639] Call Trace:
[79804.410641] [<ffffffff81082108>] ? release_pages+0x1d8/0x200
[79804.410643] [<ffffffff8107a0de>] ? find_get_pages+0x2e/0x120
[79804.410648] [<ffffffff811802b3>] ? cpumask_any_but+0x23/0x40
[79804.410651] [<ffffffff814831b8>] ? __mutex_lock_slowpath+0xc8/0x140
[79804.410653] [<ffffffff810218c5>] ? ptep_set_access_flags+0x25/0x30
[79804.410655] [<ffffffff81482d3a>] ? mutex_lock+0x1a/0x40
[79804.410658] [<ffffffffa0008624>] ? ppp_ioctl+0x2f4/0xf20 [ppp_generic]
[79804.410661] [<ffffffff8101e2b8>] ? do_page_fault+0x198/0x460
[79804.410663] [<ffffffff810c28be>] ? dput+0x1e/0x190
[79804.410678] [<ffffffff810be1bf>] ? do_vfs_ioctl+0x8f/0x530
[79804.410680] [<ffffffff810be6a9>] ? sys_ioctl+0x49/0x80
[79804.410683] [<ffffffff814848bb>] ? system_call_fastpath+0x16/0x1b
[79804.410684] INFO: task pppd:31999 blocked for more than 120 seconds.
[79804.410686] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[79804.410687] pppd D 0000000000000001 0 31999 31800 0x00000000
[79804.410690] ffff88015986bb20 0000000000000082 0000000000002000
0000000000000000
[79804.410692] ffff8801590ec080 0000000000004000 ffff88010b9e9fd8
ffff88010b9e9fd8
[79804.410695] ffff88008c190500 ffff88010b9e9e88 00000010000000bb
ffff88008c190500
[79804.410698] Call Trace:
[79804.410701] [<ffffffff81375e48>] ? sock_recvmsg+0xf8/0x140
[79804.410703] [<ffffffff81375fd5>] ? sock_sendmsg+0xe5/0x120
[79804.410708] [<ffffffff81082108>] ? release_pages+0x1d8/0x200
[79804.410711] [<ffffffff81090cbe>] ? unmap_vmas+0x3fe/0x750
[79804.410714] [<ffffffff814831b8>] ? __mutex_lock_slowpath+0xc8/0x140
[79804.410717] [<ffffffff81482d3a>] ? mutex_lock+0x1a/0x40
[79804.410719] [<ffffffffa00083bb>] ? ppp_ioctl+0x8b/0xf20 [ppp_generic]
[79804.410722] [<ffffffff81484139>] ? _raw_spin_lock_bh+0x9/0x30
[79804.410725] [<ffffffff81045fb4>] ? bit_waitqueue+0x14/0xa0
[79804.410728] [<ffffffff810e3d30>] ? fsnotify_clear_marks_by_inode+0x20/0xd0
[79804.410730] [<ffffffff810be1bf>] ? do_vfs_ioctl+0x8f/0x530
[79804.410732] [<ffffffff810c296a>] ? dput+0xca/0x190
[79804.410735] [<ffffffff810af57e>] ? fput+0x15e/0x220
[79804.410737] [<ffffffff810be6a9>] ? sys_ioctl+0x49/0x80
[79804.410739] [<ffffffff814848bb>] ? system_call_fastpath+0x16/0x1b
[79811.840094] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 138
[79821.980036] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 117
[79832.120019] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 96
[79842.260020] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 74
[79852.400168] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 52
[79862.540040] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 30
[79872.680037] unregister_netdevice: waiting for ppp618 to become free. Usage
count = 9
After this crash from dmesg i kill alll pppd services but users can not hang
need to restart server to back in work state.
After rebuild and back to old kernel 3.2.21 it has no problema
I run 1000 pppoe connection to one PPP server.
Best regards,
m.
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* Re: Fw: [Bug 54601] New: PPP regression on 3.2.39 stop work need restart server ont version 3.2.21 not found this problem.
2013-03-01 16:47 Fw: [Bug 54601] New: PPP regression on 3.2.39 stop work need restart server ont version 3.2.21 not found this problem Stephen Hemminger
@ 2013-03-04 22:48 ` Ben Hutchings
2013-03-05 0:05 ` Eric Dumazet
0 siblings, 1 reply; 3+ messages in thread
From: Ben Hutchings @ 2013-03-04 22:48 UTC (permalink / raw)
To: Stephen Hemminger; +Cc: netdev, micron10, Eric Dumazet
On Fri, Mar 01, 2013 at 08:47:05AM -0800, Stephen Hemminger wrote:
>
>
> Begin forwarded message:
>
> Date: Fri, 1 Mar 2013 01:24:14 -0800
> From: "bugzilla-daemon@bugzilla.kernel.org" <bugzilla-daemon@bugzilla.kernel.org>
> To: "stephen@networkplumber.org" <stephen@networkplumber.org>
> Subject: [Bug 54601] New: PPP regression on 3.2.39 stop work need restart server ont version 3.2.21 not found this problem.
>
>
> https://bugzilla.kernel.org/show_bug.cgi?id=54601
>
> Summary: PPP regression on 3.2.39 stop work need restart server
> ont version 3.2.21 not found this problem.
> Product: Networking
> Version: 2.5
> Kernel Version: 3.2.39
> Platform: All
> OS/Version: Linux
> Tree: Mainline
> Status: NEW
> Severity: high
> Priority: P1
> Component: Other
> AssignedTo: shemminger@linux-foundation.org
> ReportedBy: micron10@gmail.com
> Regression: Yes
>
>
> Hi
> watch a problem with PPP after upgrade to version 3.2.39 ppp service stop work
> 2 hours after start with this crash :
>
> [79619.180026] unregister_netdevice: waiting for ppp618 to become free. Usage
> count = 562
[...]
> [79862.540040] unregister_netdevice: waiting for ppp618 to become free. Usage
> count = 30
> [79872.680037] unregister_netdevice: waiting for ppp618 to become free. Usage
> count = 9
[...]
So there are many references left to the device, which slowly go away
(very slowly, about 2 per second). Maybe there are skbs in a queue somewhere
that still refer to the PPP device.
Since this a regression between 3.2.21 and 3.2.29, it might have been
introduced by:
commit 73a3346556281fd56f39f0a9475249e5039d8807
Author: Eric Dumazet <edumazet@google.com>
Date: Thu Jun 14 06:42:44 2012 +0000
net: remove skb_orphan_try()
commit 62b1a8ab9b3660bb820d8dfe23148ed6cda38574 upstream.
But this is a bit of a guess. And I don't think that this change
would do more than expose/exacerbate a bug that already existed.
Ben.
--
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
- Albert Camus
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Fw: [Bug 54601] New: PPP regression on 3.2.39 stop work need restart server ont version 3.2.21 not found this problem.
2013-03-04 22:48 ` Ben Hutchings
@ 2013-03-05 0:05 ` Eric Dumazet
0 siblings, 0 replies; 3+ messages in thread
From: Eric Dumazet @ 2013-03-05 0:05 UTC (permalink / raw)
To: Ben Hutchings; +Cc: Stephen Hemminger, netdev, micron10, Eric Dumazet
On Mon, 2013-03-04 at 22:48 +0000, Ben Hutchings wrote:
> On Fri, Mar 01, 2013 at 08:47:05AM -0800, Stephen Hemminger wrote:
> >
> >
> > Begin forwarded message:
> >
> > Date: Fri, 1 Mar 2013 01:24:14 -0800
> > From: "bugzilla-daemon@bugzilla.kernel.org" <bugzilla-daemon@bugzilla.kernel.org>
> > To: "stephen@networkplumber.org" <stephen@networkplumber.org>
> > Subject: [Bug 54601] New: PPP regression on 3.2.39 stop work need restart server ont version 3.2.21 not found this problem.
> >
> >
> > https://bugzilla.kernel.org/show_bug.cgi?id=54601
> >
> > Summary: PPP regression on 3.2.39 stop work need restart server
> > ont version 3.2.21 not found this problem.
> > Product: Networking
> > Version: 2.5
> > Kernel Version: 3.2.39
> > Platform: All
> > OS/Version: Linux
> > Tree: Mainline
> > Status: NEW
> > Severity: high
> > Priority: P1
> > Component: Other
> > AssignedTo: shemminger@linux-foundation.org
> > ReportedBy: micron10@gmail.com
> > Regression: Yes
> >
> >
> > Hi
> > watch a problem with PPP after upgrade to version 3.2.39 ppp service stop work
> > 2 hours after start with this crash :
> >
> > [79619.180026] unregister_netdevice: waiting for ppp618 to become free. Usage
> > count = 562
> [...]
> > [79862.540040] unregister_netdevice: waiting for ppp618 to become free. Usage
> > count = 30
> > [79872.680037] unregister_netdevice: waiting for ppp618 to become free. Usage
> > count = 9
> [...]
>
> So there are many references left to the device, which slowly go away
> (very slowly, about 2 per second). Maybe there are skbs in a queue somewhere
> that still refer to the PPP device.
>
> Since this a regression between 3.2.21 and 3.2.29, it might have been
> introduced by:
>
> commit 73a3346556281fd56f39f0a9475249e5039d8807
> Author: Eric Dumazet <edumazet@google.com>
> Date: Thu Jun 14 06:42:44 2012 +0000
>
> net: remove skb_orphan_try()
>
> commit 62b1a8ab9b3660bb820d8dfe23148ed6cda38574 upstream.
>
> But this is a bit of a guess. And I don't think that this change
> would do more than expose/exacerbate a bug that already existed.
>
> Ben.
>
I wonder which component could possibly take one dev refcnt for every
packet.
maybe xdst_queue_output in net/xfrm/xfrm_policy.c ?
Then maybe the cleanup is not properly done at device dismantle
^ permalink raw reply [flat|nested] 3+ messages in thread
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2013-03-01 16:47 Fw: [Bug 54601] New: PPP regression on 3.2.39 stop work need restart server ont version 3.2.21 not found this problem Stephen Hemminger
2013-03-04 22:48 ` Ben Hutchings
2013-03-05 0:05 ` Eric Dumazet
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