diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-04-06 13:45:03 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-07 12:48:56 +0400 |
| commit | b6276f353bf490add62dcf7db0ebd75baa3e1a37 (patch) | |
| tree | 9720a848fca77555bef9658c56445815f6f2a29d /arch/x86/include/asm/irq_vectors.h | |
| parent | 671dec5daf3b3c43c5777be282f00120a44cf37f (diff) | |
| download | linux-b6276f353bf490add62dcf7db0ebd75baa3e1a37.tar.xz | |
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.h | 5 |
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 @@ #define GENERIC_INTERRUPT_VECTOR 0xed /* + * Performance monitoring pending work vector: + */ +#define LOCAL_PENDING_VECTOR 0xec + +/* * First APIC vector available to drivers: (vectors 0x30-0xee) we * start at 0x31(0x41) to spread out vectors evenly between priority * levels. (0x80 is the syscall vector) |