linux-stable/kernel/events
Song Liu baf1b12a67 perf: fix perf_event_context->time
Time readers rely on perf_event_context->[time|timestamp|timeoffset] to get
accurate time_enabled and time_running for an event. The difference between
ctx->timestamp and ctx->time is the among of time when the context is not
enabled. __update_context_time(ctx, false) is used to increase timestamp,
but not time. Therefore, it should only be called in ctx_sched_in() when
EVENT_TIME was not enabled.

Fixes: 09f5e7dc7a ("perf: Fix perf_event_read_local() time")
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/r/20230313171608.298734-1-song@kernel.org
2023-03-15 21:49:46 +01:00
..
callchain.c uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
core.c perf: fix perf_event_context->time 2023-03-15 21:49:46 +01:00
hw_breakpoint.c perf/hw_breakpoint: Annotate tsk->perf_event_mutex vs ctx->mutex 2022-10-04 13:32:09 +02:00
hw_breakpoint_test.c perf/hw_breakpoint: test: Skip the test if dependencies unmet 2022-11-02 12:22:05 +01:00
internal.h perf/core: Fix perf_mmap fail when CONFIG_PERF_USE_VMALLOC enabled 2022-04-19 21:15:42 +02:00
Makefile perf/hw_breakpoint: Add KUnit test for constraints accounting 2022-08-30 10:56:20 +02:00
ring_buffer.c perf: Fix missing SIGTRAPs 2022-10-17 16:32:05 +02:00
uprobes.c mm/mmap: remove __vma_adjust() 2023-02-09 16:51:38 -08:00