On 2015/7/2 15:02, Xiao, Jin wrote: > Hi Joerg, > > On 7/2/2015 2:52 PM, Joerg Roedel wrote: >> Hi Jin, >> >> On Thu, Jul 02, 2015 at 12:24:34PM +0800, xiao jin wrote: >>> [ 106.107851] BUG: unable to handle kernel NULL pointer dereference at >>> 0000000000000040 >>> [ 106.116702] IP: >>> [ 106.118490] [<ffffffff810044f6>] >>> check_irq_vectors_for_cpu_disable+0x76/0x180 >> This might be the same issue I fixed with: >> >> d97eb8966c91 x86/irq: Check for valid irq descriptor in >> check_irq_vectors_for_cpu_disable() >> >> Can you try whether applying this patch on your kernel fixes your >> issue? >> > Yes, I agree d97eb8966c91 fix the IPANIC. I just notice a description from > http://lkml.kernel.org/r/20150204132754.ga10...@suse.de. > > I wish to share the debug result and root cause from my side.
commit d97eb8966c91f2c9d05f0a22eb89ed5b76d966d1 looks like a workaround. Could Jin's patch be merged also? free_msi_irqs does have a race with smp_callin=>..=>__setup_vector_irq. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
