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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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[PATCH] x86_64: Don't claim too many vectors for TLB flushing
It looks like the new scalable TLB flush code for x86_64 is claiming
one more IRQ vector than it actually uses.
Signed-off-by: Jason Uhlenkott <jasonuhl@sgi.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
authored by
Jason Uhlenkott
and committed by
Linus Torvalds
e080e9d6
5b22a385
+3
-4
include/asm-x86_64/hw_irq.h
+3
-4
include/asm-x86_64/hw_irq.h
···
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* some of the following vectors are 'rare', they are merged
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* into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
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* TLB, reschedule and local APIC vectors are performance-critical.
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-
*
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* Vectors 0xf0-0xf9 are free (reserved for future Linux use).
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*/
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#define SPURIOUS_APIC_VECTOR 0xff
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#define ERROR_APIC_VECTOR 0xfe
···
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#define KDB_VECTOR 0xfb /* reserved for KDB */
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#define THERMAL_APIC_VECTOR 0xfa
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#define THRESHOLD_APIC_VECTOR 0xf9
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-
#define INVALIDATE_TLB_VECTOR_END 0xf8
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-
#define INVALIDATE_TLB_VECTOR_START 0xf0 /* f0-f8 used for TLB flush */
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+
/* f8 free */
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+
#define INVALIDATE_TLB_VECTOR_END 0xf7
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+
#define INVALIDATE_TLB_VECTOR_START 0xf0 /* f0-f7 used for TLB flush */
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#define NUM_INVALIDATE_TLB_VECTORS 8
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