(resending, for some reason TB dropped Michal's email address) (cc'ing linux-ide) On 06/15/2010 11:28 AM, Michal Svoboda wrote: > Hello list, > > Sometimes I get a 'nobody cared' message such as this > > [ 202.078556] irq 16: nobody cared (try booting with the "irqpoll" option) > [ 202.078561] Pid: 0, comm: swapper Not tainted 2.6.33 #1 > [ 202.078563] Call Trace: > [ 202.078565] <IRQ> [<ffffffff8106ef16>] __report_bad_irq+0x26/0xa0 > [ 202.078574] [<ffffffff8106f11a>] note_interrupt+0x18a/0x1d0 > [ 202.078578] [<ffffffff8106da0a>] ? handle_IRQ_event+0x4a/0xf0 > [ 202.078582] [<ffffffff8106fe3d>] handle_fasteoi_irq+0xcd/0x100 > [ 202.078587] [<ffffffff810055dd>] handle_irq+0x1d/0x30 > [ 202.078590] [<ffffffff81005257>] do_IRQ+0x67/0xf0 > [ 202.078595] [<ffffffff81414493>] ret_from_intr+0x0/0xa > [ 202.078597] <EOI> [<ffffffff81211b48>] ? acpi_idle_enter_bm+0x224/0x24d > [ 202.078606] [<ffffffff81211b3e>] ? acpi_idle_enter_bm+0x21a/0x24d > [ 202.078611] [<ffffffff8131c72b>] cpuidle_idle_call+0x9b/0x100 > [ 202.078615] [<ffffffff8100099c>] cpu_idle+0x9c/0xf0 > [ 202.078618] [<ffffffff81003290>] ? kernel_thread_helper+0x0/0x10 > [ 202.078624] [<ffffffff813fd9bf>] rest_init+0x8f/0xa0 > [ 202.078628] [<ffffffff815ceb31>] start_kernel+0x322/0x32d > [ 202.078632] [<ffffffff815ce2e7>] x86_64_start_reservations+0xf7/0xfb > [ 202.078636] [<ffffffff815ce3d3>] x86_64_start_kernel+0xe8/0xef > [ 202.078638] handlers: > [ 202.078639] [<ffffffff812af0e0>] (mpt_interrupt+0x0/0x990) > [ 202.078645] [<ffffffff812d6ed0>] (usb_hcd_irq+0x0/0x70) > [ 202.078649] Disabling IRQ #16 > > And then my disks go turtle speed: > /dev/sda: > Timing cached reads: 9180 MB in 2.00 seconds = 4591.89 MB/sec > Timing buffered disk reads: 8 MB in 3.20 seconds = 2.50 MB/sec > > IRQ 16 seems to have something to do with disks: > [ 19.703064] scsi6 : ioc0: LSISAS1068E B3, FwRev=00192f00h, Ports=1, > MaxQ=266, IRQ=16 > CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 > CPU6 CPU7 > 16: 200124 0 0 0 0 0 > 0 0 IO-APIC-fasteoi ioc0, uhci_hcd:usb3 > > Is the performance drop caused by the 'disabling IRQ'? And why would > the 'nobody cared' message be printed in the first place (it happens > only sometimes)? And is there a way out of this (ie. enabling the IRQ) > besides rebooting? Can you please post full boot log? Also, can you give a shot at the following git tree? git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git lost-spurious-irq Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
