linux

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Sebastian Andrzej Siewior 16b9569df9 perf: Don't disable preemption in perf_pending_task().

perf_pending_task() is invoked in task context and disables preemption
because perf_swevent_get_recursion_context() used to access per-CPU
variables. The other reason is to create a RCU read section while
accessing the perf_event.

The recursion counter is no longer a per-CPU accounter so disabling
preemption is no longer required. The RCU section is needed and must be
created explicit.

Replace the preemption-disable section with a explicit RCU-read section.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20240704170424.1466941-7-bigeasy@linutronix.de

2024-07-09 13:26:36 +02:00

callchain.c

perf: Shrink the size of the recursion counter.

2024-07-09 13:26:35 +02:00

core.c

perf: Don't disable preemption in perf_pending_task().

2024-07-09 13:26:36 +02:00

hw_breakpoint_test.c

perf/hw_breakpoint: remove MODULE_LICENSE in non-modules

2023-04-13 13:13:52 -07:00

hw_breakpoint.c

perf/hw_breakpoint: Remove arch breakpoint hooks