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authorThomas Gleixner <tglx@linutronix.de>2017-09-13 23:29:54 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-09-25 20:52:03 +0200
commitd6ffc6ac83b1f9f12652d89b9cb5bcbfbea7796c (patch)
tree4778e10f3c0f13cc185fd68133b0475c9592af9b /init
parentx86/irq: Simplify hotplug vector accounting (diff)
downloadlinux-d6ffc6ac83b1f9f12652d89b9cb5bcbfbea7796c.tar.xz
linux-d6ffc6ac83b1f9f12652d89b9cb5bcbfbea7796c.zip
x86/vector: Respect affinity mask in irq descriptor
The interrupt descriptor has a preset affinity mask at allocation time, which is usually the default affinity mask. The current code does not respect that mask and places the vector at some random CPU, which gets corrected later by a set_affinity() call. That's silly because the vector allocation can respect the mask upfront and place the interrupt on a CPU which is in the mask. If that fails, then the affinity is broken and a interrupt assigned on any online CPU. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Juergen Gross <jgross@suse.com> Tested-by: Yu Chen <yu.c.chen@intel.com> Acked-by: Juergen Gross <jgross@suse.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Alok Kataria <akataria@vmware.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Rui Zhang <rui.zhang@intel.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Len Brown <lenb@kernel.org> Link: https://lkml.kernel.org/r/20170913213156.431670325@linutronix.de
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