mirror of https://github.com/torvalds/linux.git
e360adbe29
Provide a mechanism that allows running code in IRQ context. It is most useful for NMI code that needs to interact with the rest of the system -- like wakeup a task to drain buffers. Perf currently has such a mechanism, so extract that and provide it as a generic feature, independent of perf so that others may also benefit. The IRQ context callback is generated through self-IPIs where possible, or on architectures like powerpc the decrementer (the built-in timer facility) is set to generate an interrupt immediately. Architectures that don't have anything like this get to do with a callback from the timer tick. These architectures can call irq_work_run() at the tail of any IRQ handlers that might enqueue such work (like the perf IRQ handler) to avoid undue latencies in processing the work. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [ various fixes ] Signed-off-by: Huang Ying <ying.huang@intel.com> LKML-Reference: <1287036094.7768.291.camel@yhuang-dev> Signed-off-by: Ingo Molnar <mingo@elte.hu> |
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| .. | ||
| cpufreq | ||
| mcheck | ||
| mtrr | ||
| .gitignore | ||
| Makefile | ||
| amd.c | ||
| bugs.c | ||
| bugs_64.c | ||
| centaur.c | ||
| common.c | ||
| cpu.h | ||
| cyrix.c | ||
| hypervisor.c | ||
| intel.c | ||
| intel_cacheinfo.c | ||
| mkcapflags.pl | ||
| mshyperv.c | ||
| perf_event.c | ||
| perf_event_amd.c | ||
| perf_event_intel.c | ||
| perf_event_intel_ds.c | ||
| perf_event_intel_lbr.c | ||
| perf_event_p4.c | ||
| perf_event_p6.c | ||
| perfctr-watchdog.c | ||
| powerflags.c | ||
| proc.c | ||
| scattered.c | ||
| sched.c | ||
| topology.c | ||
| transmeta.c | ||
| umc.c | ||
| vmware.c | ||