On 7/27/2012 11:40 AM, Stirling Westrup wrote: > I recently purchased a large system for use as a backup server for a > pair of small businesses. It contains a boot drive plus 10 more > storage drives. Despite having three onboard SATA controllers, the > motherboard didn't have enough SATA connectors for all the drives, so > I installed a pair of identical SiI3114 raid cards to handle the extra > connections. It has a Sandy Bridge chipset, so I installed a 3.2 > kernel. > > # uname -a > Linux ttt 3.2.0-0.bpo.2-amd64 #1 SMP Fri Jun 29 20:42:29 UTC 2012 > x86_64 GNU/Linux ... > Okay, enough background. Here's the issue: I had no trouble building > and sync'ing the first array, but when I try to sync the second array, > I always get the following dmesg an hour or so into the process: > > irq 19: nobody cared (try booting with the "irqpoll" option) > [ 346.120572] Pid: 1100, comm: md1_resync Not tainted 3.2.0-0.bpo.2-amd64 #1 > [ 346.120573] Call Trace: > ... > [ 346.120697] handlers: > [ 346.120699] [<ffffffffa00479e0>] ahci_interrupt > [ 346.120702] [<ffffffffa02f17ec>] sil_interrupt > [ 346.120703] Disabling IRQ #19 > [ 346.122145] sched: RT throttling activated ... > From this point onward syncing drops to a tiny fraction of its > previous speed. I've tried booting with 'irqpoll' as the error message > suggests, but it has had no effect. I'm really not sure if there is a > conflict between my two SiI3114's or between the SiI's and the Marvell > controller (although I've never had an issue with Marvell in the > past), nor how to go about diagnosing or fixing this. I'll include a > full dmesg dump below, as well as my currently loaded modules. If > anyone wants any further info, just ask. Have you tried irqbalance to spread the interrupts across cores/cache domains? https://irqbalance.org/documentation.html Dual/quad socket machines benefit more than a single socket machine, but the latter can still benefit if the cache hierarchy is appropriate. ~$ aptitude install irqbalance No guarantees this will fix your problem but it's worth a shot. Takes a few seconds to install, and it won't cause any negative effects, even if it yields no positive effects. -- Stan -- 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
