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Date: Thu, 26 Jun 2014 06:13:39 +0000 From: "Zhangbo (Oscar)" <oscar.zhangbo@...wei.com> To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> CC: "Huangpeng (Peter)" <peter.huangpeng@...wei.com>, Yanxiaodan <yanxiaodan@...wei.com>, "Zhoujian (jay, Euler)" <jianjay.zhou@...wei.com>, Luonengjun <luonengjun@...wei.com>, "Huangweidong (C)" <weidong.huang@...wei.com>, Yanqiangjun <yanqiangjun@...wei.com>, "Zhaoyanbin (A)" <lefty.zhao@...wei.com>, Suresh Siddha <suresh.b.siddha@...el.com>, "H. Peter Anvin" <hpa@...ux.intel.com>, "Ingo Molnar" <mingo@...nel.org>, Alexander Gordeev <agordeev@...hat.com>, "Thomas Gleixner" <tglx@...utronix.de> Subject: X86/irq: failed to assign vectors from CPU0 Msi or Msi-x interrupts assign vectors from a CPU while the number of CUPs is more than 8. __assign_irq_vector() is responsible for assigning vectors from low-numbered CPUs by default. If there are a lot of Msi or Msi-x interrupts, it will cause the low-numbered CPUs out of vectors, so the subsequent interrupts will be failed to allocate vectors from these CPUs. What is the consideration of preferentially assigning vectors from low-numbered CPUs? How about assigning vectors from the CPUs which have the maximum number of unused vectors? Thank you in advance. -- 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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