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Date: Tue, 16 Jun 2015 13:51:28 +0800 From: Jiang Liu <jiang.liu@...ux.intel.com> To: Huang Ying <ying.huang@...el.com> CC: Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org> Subject: Re: [lkp] [x86/MSI] 52f518a3a7c: -30.5% netperf.Throughput_tps On 2015/6/16 13:41, Huang Ying wrote: > Hi, Gerry, > > On Tue, 2015-06-16 at 10:09 +0800, Jiang Liu wrote: >> On 2015/6/16 1:52, Thomas Gleixner wrote: >>> On Mon, 15 Jun 2015, Huang Ying wrote: >> lkml.org/lkml/2015/6/1/80 >> The root cause is that, with hierarchy irqdomain enabled, >> there are multiple irq_data associated with one irq. And function >> irq_move_irq() on x86 uses a wrong copy of irq_data to check >> whether there's pending irq migration operation. So all irq migration >> /set_affinity operations will get pending for ever. This may >> affect network performance due to interrupt load balance issue. >> And the patch set posted at >> www.gossamer-threads.com/lists/linux/kernel/2185533 >> should have solved all such regressions. > > Thanks for your information. Do you have a git tree for this patchset? Hi Ying, You may access the branch at: https://github.com/jiangliu/linux test/irq_data_v3 or view at url: https://github.com/jiangliu/linux/tree/test/irq_data_v3 Thanks! Gerry > > Best Regards, > Huang, Ying > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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