Peter Zijlstra 33238c5045 perf/core: Fix event cgroup tracking ... Song reports that installing cgroup events is broken since: db0503e4f6 ("perf/core: Optimize perf_install_in_event()") The problem being that cgroup events try to track cpuctx->cgrp even for disabled events, which is pointless and actively harmful since the above commit. Rework the code to have explicit enable/disable hooks for cgroup events, such that we can limit cgroup tracking to active events. More specifically, since the above commit disabled events are no longer added to their context from the 'right' CPU, and we can't access things like the current cgroup for a remote CPU. Cc: <stable@vger.kernel.org> # v5.5+ Fixes: db0503e4f6 ("perf/core: Optimize perf_install_in_event()") Reported-by: Song Liu <songliubraving@fb.com> Tested-by: Song Liu <songliubraving@fb.com> Reviewed-by: Song Liu <songliubraving@fb.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20200318193337.GB20760@hirez.programming.kicks-ass.net		2020-04-08 11:33:44 +02:00
..
callchain.c	perf/core: Convert to SPDX license identifiers	2019-02-04 08:46:11 +01:00
core.c	perf/core: Fix event cgroup tracking	2020-04-08 11:33:44 +02:00
hw_breakpoint.c	perf/hw_breakpoint: Fix arch_hw_breakpoint use-before-initialization	2019-09-06 08:24:01 +02:00
internal.h	perf: Make struct ring_buffer less ambiguous	2020-01-13 13:19:38 -05:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ring_buffer.c	perf: Make struct ring_buffer less ambiguous	2020-01-13 13:19:38 -05:00
uprobes.c	mm/mmap.c: use IS_ERR_VALUE to check return value of get_unmapped_area	2019-12-01 06:29:19 -08:00