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micha_52Offline
Post subject: kworker consumes ~100% cpu  PostPosted: 21.10.2010, 08:36



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kworker consumes nearly 100% cpu after upgrade to latest kernel: Linux 2.6.36-0.slh.1-aptosid-amd64 x86_64

Any hint?

Thanks,
Michael
 
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arwaOffline
Post subject:   PostPosted: 21.10.2010, 11:27



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I now tried the 32bit 2.6.36-0.slh.1-aptosid-686 kernel on a 1-core machine. Here everything is fine.

So maybe it is a problem of 64bit, multi-core, hmm, or something else... Sorry, cannot help.
 
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slhOffline
Post subject:   PostPosted: 21.10.2010, 11:30



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tags -1 + unreproducible
tags -1 + moreinfo
thanks
      Code:
    4 root      20   0     0    0    0 S    0  0.0   0:00.00 kworker/0:0
 
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slhOffline
Post subject:   PostPosted: 21.10.2010, 13:18



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Please post "lspci -knn" and "dmesg | grep -i -e b4[34] -e ssb -e phy".
 
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micha_52Offline
Post subject:   PostPosted: 21.10.2010, 13:37



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lspci -knn gives this output:

      Code:

00:00.0 Host bridge [0600]: Intel Corporation Core Processor DMI [8086:d131] (rev 11)
        Subsystem: Dell Device [1028:040d]
00:03.0 PCI bridge [0604]: Intel Corporation Core Processor PCI Express Root Port 1 [8086:d138] (rev 11)
00:08.0 System peripheral [0880]: Intel Corporation Core Processor System Management Registers [8086:d155] (rev 11)
        Subsystem: Device [0028:000d]
00:08.1 System peripheral [0880]: Intel Corporation Core Processor Semaphore and Scratchpad Registers [8086:d156] (rev 11)
        Subsystem: Device [0028:000d]
00:08.2 System peripheral [0880]: Intel Corporation Core Processor System Control and Status Registers [8086:d157] (rev 11)
        Subsystem: Device [0028:000d]
00:08.3 System peripheral [0880]: Intel Corporation Core Processor Miscellaneous Registers [8086:d158] (rev 11)
        Subsystem: Device [0028:000d]
00:10.0 System peripheral [0880]: Intel Corporation Core Processor QPI Link [8086:d150] (rev 11)
        Subsystem: Device [0028:000d]
00:10.1 System peripheral [0880]: Intel Corporation Core Processor QPI Routing and Protocol Registers [8086:d151] (rev 11)
        Subsystem: Device [0028:000d]
00:16.0 Communication controller [0780]: Intel Corporation 5 Series/3400 Series Chipset HECI Controller [8086:3b64] (rev 06)
        Subsystem: Dell Device [1028:040d]
00:1a.0 USB Controller [0c03]: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller [8086:3b3c] (rev 06)
        Subsystem: Dell Device [1028:040d]
        Kernel driver in use: ehci_hcd
00:1b.0 Audio device [0403]: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio [8086:3b56] (rev 06)
        Subsystem: Dell Device [1028:040d]
        Kernel driver in use: HDA Intel
00:1c.0 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 [8086:3b42] (rev 06)
00:1c.1 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 [8086:3b44] (rev 06)
00:1c.5 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 6 [8086:3b4c] (rev 06)
00:1d.0 USB Controller [0c03]: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller [8086:3b34] (rev 06)
        Subsystem: Dell Device [1028:040d]
        Kernel driver in use: ehci_hcd
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev a6)
00:1f.0 ISA bridge [0601]: Intel Corporation 5 Series Chipset LPC Interface Controller [8086:3b08] (rev 06)
        Subsystem: Dell Device [1028:040d]
00:1f.2 RAID bus controller [0104]: Intel Corporation 82801 SATA RAID Controller [8086:2822] (rev 06)
        Subsystem: Dell Device [1028:040d]
        Kernel driver in use: ahci
00:1f.3 SMBus [0c05]: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller [8086:3b30] (rev 06)
        Subsystem: Dell Device [1028:040d]
        Kernel driver in use: i801_smbus
01:00.0 VGA compatible controller [0300]: nVidia Corporation G92 [GeForce GTS 240] [10de:0607] (rev a2)
        Subsystem: nVidia Corporation Device [10de:0736]
        Kernel driver in use: nvidia
03:00.0 FireWire (IEEE 1394) [0c00]: VIA Technologies, Inc. VT6315 Series Firewire Controller [1106:3403]
        Subsystem: Dell Device [1028:040d]
        Kernel driver in use: firewire_ohci
04:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM57780 Gigabit Ethernet PCIe [14e4:1692] (rev 01)
        Subsystem: Dell Device [1028:040d]
        Kernel driver in use: tg3


the next command:
dmesg | grep -i -e b4[34] -e ssb -e phy
results in:
no matches found: b4[34]

regards,
Michael
 
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slhOffline
Post subject:   PostPosted: 21.10.2010, 13:46



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hmm, if you were using Broadcom b44 ethernet, I'd have a suspicion, but tg3 shouldn't be affected. Anything else sticking out in dmesg?
Testing without binary nvidia modules would likely be more meaningful as well.
 
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micha_52Offline
Post subject:   PostPosted: 21.10.2010, 14:23



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no change when unloading the nvidia module and tg3 module or both. Can't find anything unusual in dmesg.
 
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etorixOffline
Post subject:   PostPosted: 22.10.2010, 20:53
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is this relevant: http://www.mail-archive.com/acpi-bugzil ... 31739.html
 
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micha_52Offline
Post subject:   PostPosted: 22.10.2010, 21:48



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etorix,

yes, I think it is. I read this and some other complaints.
Until there is no change I'm using the 2.6.35-7.slh.4-aptosid-amd64 kernel and that works fine.

Greetings
 
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micha_52Offline
15 Post subject:   PostPosted: 05.01.2011, 11:10



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problem is solved using the current kernel: 2.6.37-0.slh.1-aptosid-amd64
 
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