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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-04-06 05:45:03 -0400
committerIngo Molnar <mingo@elte.hu>2009-04-07 04:48:56 -0400
commitb6276f353bf490add62dcf7db0ebd75baa3e1a37 (patch)
tree9720a848fca77555bef9658c56445815f6f2a29d /arch/x86/include/asm/irq_vectors.h
parent671dec5daf3b3c43c5777be282f00120a44cf37f (diff)
perf_counter: x86: self-IPI for pending work
Implement set_perf_counter_pending() with a self-IPI so that it will run ASAP in a usable context. For now use a second IRQ vector, because the primary vector pokes the apic in funny ways that seem to confuse things. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <20090406094517.724626696@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/irq_vectors.h')
-rw-r--r--arch/x86/include/asm/irq_vectors.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h
index 3cbd79bbb47c..545bb811ccb5 100644
--- a/arch/x86/include/asm/irq_vectors.h
+++ b/arch/x86/include/asm/irq_vectors.h
@@ -117,6 +117,11 @@
117#define GENERIC_INTERRUPT_VECTOR 0xed 117#define GENERIC_INTERRUPT_VECTOR 0xed
118 118
119/* 119/*
120 * Performance monitoring pending work vector:
121 */
122#define LOCAL_PENDING_VECTOR 0xec
123
124/*
120 * First APIC vector available to drivers: (vectors 0x30-0xee) we 125 * First APIC vector available to drivers: (vectors 0x30-0xee) we
121 * start at 0x31(0x41) to spread out vectors evenly between priority 126 * start at 0x31(0x41) to spread out vectors evenly between priority
122 * levels. (0x80 is the syscall vector) 127 * levels. (0x80 is the syscall vector)