Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: [PATCH v3 3/3] genirq: Use the maple tree for IRQ descriptors management | Date | Wed, 10 May 2023 16:41:09 +0200 |
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Yujie!
On Wed, May 10 2023 at 15:24, Yujie Liu wrote: > On Mon, May 08, 2023 at 11:36:37AM +0200, Thomas Gleixner wrote: >> Ok. So one difference might be that a 64 bit kernel enables interrupt >> rempping. Can you add 'intremap=off' to the kernel command line please? > > Sorry, my previous info was incorrect. > > The block/008 (do IO while hotplugging CPUs) failure also happens on a > 64-bit kernel no matter having 'intremap=off' or not, and persists when > tested against v6.3, but the warning in default_send_IPI_mask_logical > function is not triggered on a 64-bit kernel. Not sure if that function > is 32-bit specific since it is set in arch/x86/kernel/apic/probe_32.c.
Ok. That makes more sense as the issue is clearly independent of 32 or 64 bit.
I decoded it by now and that maple_tree conversion is the culprit. It broke irq_get_next_irq() which is used during hotplug. It misses every other interrupt, so affinities are not fixed up.
Please ignore that series.
Thanks a lot for your help!
tglx
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