Namhyung Kim bec2ee2390 perf/core: Try to allocate task_ctx_data quickly ...

The attach_global_ctx_data() has O(N^2) algorithm to allocate the
context data for each thread.  This caused perfomance problems on large
systems with O(100k) threads.

Because kmalloc(GFP_KERNEL) can go sleep it cannot be called under the
RCU lock.  So let's try with GFP_NOWAIT first so that it can proceed in
normal cases.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260211223222.3119790-3-namhyung@kernel.org

2026-02-27 16:40:21 +01:00

..

callchain.c

perf: sched: Fix perf crash with new is_user_task() helper

2026-01-30 23:06:07 +01:00

core.c

perf/core: Try to allocate task_ctx_data quickly

2026-02-27 16:40:21 +01:00

hw_breakpoint_test.c

perf/hw_breakpoint: remove MODULE_LICENSE in non-modules

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

hw_breakpoint.c

Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses

2026-02-22 08:26:33 -08:00

internal.h

perf: Convert mmap() refcounts to refcount_t

2025-08-15 13:13:02 +02:00

Makefile

perf/hw_breakpoint: Add KUnit test for constraints accounting

2022-08-30 10:56:20 +02:00

ring_buffer.c

treewide: Update email address

2026-01-11 06:09:11 -10:00

uprobes.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00