diff options
| author | Sebastian Andrzej Siewior <[email protected]> | 2024-07-04 19:03:40 +0200 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2024-07-09 13:26:36 +0200 |
| commit | 16b9569df9d2ab07eeee075cb7895e9d3e08e8f0 (patch) | |
| tree | f90b1ab059207cb3715b832d260c2f4d3064eaf3 /lib/memory-notifier-error-inject.c | |
| parent | 0d40a6d83e3e6751f1107ba33587262d937c969f (diff) | |
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 <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Tested-by: Marco Elver <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'lib/memory-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions