perf/x86/intel: Unwind cpuc state if PEBS buffer setup fails

Browse source

intel_pmu_cpu_prepare() allocates per-CPU perf state first and then sets
up the arch PEBS buffer. If alloc_arch_pebs_buf_on_cpu() fails,
the previously allocated cpuc resources are left behind.

Make the failure path call intel_cpuc_finish(cpuc) to release the per-CPU
state allocated by intel_cpuc_prepare().

Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Falcon <thomas.falcon@intel.com>
Reviewed-by: Zide Chen <zide.chen@intel.com>
Link: https://patch.msgid.link/20260717080342.1879573-5-dapeng1.mi@linux.intel.com

...

This commit is contained in:

Dapeng Mi 2026-07-17 16:03:38 +08:00 • committed by Peter Zijlstra

parent 278a3731c9

commit 85182f902a

1 changed files with 9 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

11

arch/x86/events/intel/core.c

View file