[2.6.26] WARN warn_on_slowpath - Kernel
This is a discussion on [2.6.26] WARN warn_on_slowpath - Kernel ; While running my http://vanheusden.com/pyk/ script (which randomly
inserts and removes modules) I triggered the folllowing WARNING in a
2.6.26 kernel on an IBM xSeries x3650 (2 quadcores (intel qc x5450)
and 10GB ram).
[ 2812.832441] sysfs group ffffffffa0191ec0 not found ...
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[2.6.26] WARN warn_on_slowpath
While running my http://vanheusden.com/pyk/ script (which randomly
inserts and removes modules) I triggered the folllowing WARNING in a
2.6.26 kernel on an IBM xSeries x3650 (2 quadcores (intel qc x5450)
and 10GB ram).
[ 2812.832441] sysfs group ffffffffa0191ec0 not found for kobject 'cpufreq'
[ 2812.833486] ------------[ cut here ]------------
[ 2812.833556] WARNING: at fs/sysfs/group.c:139 cpufreq_stats_free_table+0x32/0x6e [cpufreq_stats]()
[ 2812.837160] Modules linked in: cpufreq_ondemand sg lp cpufreq_userspace acpi_cpufreq pcspkr edac_core ses parport_pc appletalk(-) enclosure loop thermal parport cpufreq_stats(-) video output battery cdrom rng_core qla2xxx ac rfcomm l2cap bluetooth nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs freq_table ipv6 evdev ext3 jbd mbcache dm_log dm_mod usbhid hid ff_memless sd_mod firmware_class scsi_transport_fc ide_pci_generic ide_core ehci_hcd uhci_hcd scsi_tgt aacraid scsi_mod processor thermal_sys [last unloaded: dm_mirror]
[ 2812.837160] Pid: 12061, comm: rmmod Not tainted 2.6.26-1-amd64 #1
[ 2812.837160]
[ 2812.837160] Call Trace:
[ 2812.837160] [] warn_on_slowpath+0x51/0x7a
[ 2812.837160] [] default_wake_function+0x0/0xe
[ 2812.837160] [] sysfs_find_dirent+0x1b/0x2f
[ 2812.837160] [] sysfs_get_dirent+0x51/0x59
[ 2812.837160] [] sysfs_remove_group+0x41/0xc2
[ 2812.837197] [] :cpufreq_stats:cpufreq_stats_free_table+0x32/0x6e
[ 2812.837283] [] :cpufreq_stats:cpufreq_stats_exit+0x41/0x58
[ 2812.837355] [] sys_delete_module+0x1a6/0x1fe
[ 2812.837494] [] system_call_after_swapgs+0x8a/0x8f
[ 2812.837564]
[ 2812.837623] ---[ end trace a70f168407a6dea1 ]---
[ 2812.837692] sysfs group ffffffffa0191ec0 not found for kobject 'cpufreq'
Folkert van Heusden
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[2.6.27] allows to rmmod 'ide_pci_generic' with mounted filesystems
While running my http://vanheusden.com/pyk/ script (which randomly
inserts and removes modules), the module 'ide_pci_generic' got unloaded
while filesystems were mounted that used that module. Of course the
system crashed but I think it should not be possible to unload
modules when resources it serves are still in use.
Folkert van Heusden
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MultiTail cok yonlu kullanimli bir program, loglari okumak, verilen
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view', vs. http://www.vanheusden.com/multitail/
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Re: [2.6.27] allows to rmmod 'ide_pci_generic' with mounted filesystems
Hang on: it is not ide_pci_generic causing the filesystem errors. Still
investigating.
On Tue, Nov 11, 2008 at 09:02:47PM +0100, Folkert van Heusden wrote:
> While running my http://vanheusden.com/pyk/ script (which randomly
> inserts and removes modules), the module 'ide_pci_generic' got unloaded
> while filesystems were mounted that used that module. Of course the
> system crashed but I think it should not be possible to unload
> modules when resources it serves are still in use.
>
>
> Folkert van Heusden
>
> --
> MultiTail cok yonlu kullanimli bir program, loglari okumak, verilen
> kommandolari yerine getirebilen. Filter, renk verme, merge, 'diff-
> view', vs. http://www.vanheusden.com/multitail/
> ----------------------------------------------------------------------
> Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com
Folkert van Heusden
--
MultiTail is een flexibele tool voor het volgen van logfiles en
uitvoer van commando's. Filteren, van kleur voorzien, mergen,
'diff-view', etc. http://www.vanheusden.com/multitail/
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Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com
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Re: [2.6.27] attempt to access beyond end of device
Odd, these modules were unloaded but if I unload them "by hand", the system
keeps running without any failures.
-ac
-battery
-button
-container
-dm_mirror
-dm_snapshot
-fan
-floppy
-ide_cd_mod
-parport_pc
-rng_core
-usbhid
The errors are, by the way:
[ 90.355347] attempt to access beyond end of device
[ 90.355413] dm-0: rw=0, want=4993757896, limit=565248
[ 90.355490] Buffer I/O error on device dm-0, logical block 2496878947
[ 90.355559] attempt to access beyond end of device
[ 90.355614] dm-0: rw=0, want=1967413868, limit=565248
[ 90.355674] Buffer I/O error on device dm-0, logical block 983706933
[ 90.355748] attempt to access beyond end of device
[ 90.355804] dm-0: rw=0, want=6151601454, limit=565248
[ 90.355866] Buffer I/O error on device dm-0, logical block 3075800726
[ 90.355921] attempt to access beyond end of device
[ 90.355988] dm-0: rw=0, want=2896542408, limit=565248
[ 90.356059] Buffer I/O error on device dm-0, logical block 1448271203
[ 128.751683] attempt to access beyond end of device
[ 128.751749] dm-0: rw=0, want=8168917190, limit=565248
[ 128.751817] Buffer I/O error on device dm-0, logical block 4084458594
[ 128.751887] attempt to access beyond end of device
[ 128.751941] dm-0: rw=0, want=4756365548, limit=565248
[ 128.752011] Buffer I/O error on device dm-0, logical block 2378182773
[ 128.752075] attempt to access beyond end of device
[ 128.752142] dm-0: rw=0, want=4510308232, limit=565248
[ 128.752201] Buffer I/O error on device dm-0, logical block 2255154115
[ 128.752256] attempt to access beyond end of device
[ 128.752310] dm-0: rw=0, want=1847372720, limit=565248
[ 128.752378] Buffer I/O error on device dm-0, logical block 923686359
[ 128.820595] attempt to access beyond end of device
[ 128.820665] dm-0: rw=0, want=5787791288, limit=565248
[ 128.820733] Buffer I/O error on device dm-0, logical block 2893895643
[ 128.820811] attempt to access beyond end of device
[ 128.820872] dm-0: rw=0, want=6800015832, limit=565248
[ 128.820929] Buffer I/O error on device dm-0, logical block 3400007915
On Tue, Nov 11, 2008 at 09:38:33PM +0100, Folkert van Heusden wrote:
> Hang on: it is not ide_pci_generic causing the filesystem errors. Still
> investigating.
>
> On Tue, Nov 11, 2008 at 09:02:47PM +0100, Folkert van Heusden wrote:
> > While running my http://vanheusden.com/pyk/ script (which randomly
> > inserts and removes modules), the module 'ide_pci_generic' got unloaded
> > while filesystems were mounted that used that module. Of course the
> > system crashed but I think it should not be possible to unload
> > modules when resources it serves are still in use.
> >
> >
> > Folkert van Heusden
> >
> > --
> > MultiTail cok yonlu kullanimli bir program, loglari okumak, verilen
> > kommandolari yerine getirebilen. Filter, renk verme, merge, 'diff-
> > view', vs. http://www.vanheusden.com/multitail/
> > ----------------------------------------------------------------------
> > Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com
>
>
> Folkert van Heusden
>
> --
> MultiTail is een flexibele tool voor het volgen van logfiles en
> uitvoer van commando's. Filteren, van kleur voorzien, mergen,
> 'diff-view', etc. http://www.vanheusden.com/multitail/
> ----------------------------------------------------------------------
> Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com
Folkert van Heusden
--
MultiTail is een flexibele tool voor het volgen van logfiles en
uitvoer van commando's. Filteren, van kleur voorzien, mergen,
'diff-view', etc. http://www.vanheusden.com/multitail/
----------------------------------------------------------------------
Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com
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