Re: 2.6.{30,31} x86_64 ahci problem - irq 23: nobody cared

Adding linux-ide to CC.

Alexander Huemer wrote:
the problem appears under heavy system load and slows down the system to
unusable speed.
kernels before .30 were not affected.
irqpoll does not change behavior.

error message from .31:
[157152.418524] irq 23: nobody cared (try booting with the "irqpoll" option)
[157152.418530] Pid: 1359, comm: cc1plus Tainted: G W 2.6.31-gentoo-blackbit #2
[157152.418532] Call Trace:
[157152.418534] <IRQ> [<ffffffff81066e3f>] ? __report_bad_irq+0x30/0x7d
[157152.418544] [<ffffffff81066f93>] ? note_interrupt+0x107/0x170
[157152.418547] [<ffffffff81067580>] ? handle_fasteoi_irq+0x8a/0xaa
[157152.418551] [<ffffffff8100d1cf>] ? handle_irq+0x17/0x1d
[157152.418554] [<ffffffff8100c84b>] ? do_IRQ+0x54/0xb2
[157152.418558] [<ffffffff8100b6d3>] ? ret_from_intr+0x0/0xa
[157152.418559] <EOI>
[157152.418560] handlers:
[157152.418562] [<ffffffff813d2a6f>] (ahci_interrupt+0x0/0x426)
[157152.418566] Disabling IRQ #23

bios of the machine is up to date,
i tried all related bios settings, no change.

kernel config for .31 http://xx.vu/~ahuemer/config_ahuemer_20090923.gz
lspci -vxxx http://xx.vu/~ahuemer/lspci_ahuemer_20090923
lsusb -v http://xx.vu/~ahuemer/lsusb_ahuemer_20090923
/proc/interrupts http://xx.vu/~ahuemer/proc_interrupts_ahuemer_20090923
thread in gentoo forums http://forums.gentoo.org/viewtopic-t-780725-start-0.html

please tell me what additional info is needed.

A full dmesg (or kernel log) starting from a clean boot up to the error
could be useful.

If no others reply and the issue can be reproduced reliably, running a
git bisect between v2.6.29 and v2.6.30 to trace the cause of the regression
could be an option.

Cheers,
FJP
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