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perf/core: Pass GFP flags to attach_task_ctx_data()

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This is a preparation for the next change to reduce the computational
complexity in the global context data handling for LBR callstacks.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260211223222.3119790-2-namhyung@kernel.org
This commit is contained in:
Namhyung Kim
2026-02-11 14:32:19 -08:00
committed by Peter Zijlstra
parent 6de23f81a5
commit 28c75fbfec
1 changed files with 8 additions and 8 deletions
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16
kernel/events/core.c
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@@ -5370,15 +5370,15 @@ static void unaccount_freq_event(void)
static struct perf_ctx_data *
alloc_perf_ctx_data(struct kmem_cache *ctx_cache, bool global)
alloc_perf_ctx_data(struct kmem_cache *ctx_cache, bool global, gfp_t gfp_flags)
{
struct perf_ctx_data *cd;
cd = kzalloc_obj(*cd);
cd = kzalloc_obj(*cd, gfp_flags);
if (!cd)
return NULL;
cd->data = kmem_cache_zalloc(ctx_cache, GFP_KERNEL);
cd->data = kmem_cache_zalloc(ctx_cache, gfp_flags);
if (!cd->data) {
kfree(cd);
return NULL;
@@ -5412,11 +5412,11 @@ static inline void perf_free_ctx_data_rcu(struct perf_ctx_data *cd)
static int
attach_task_ctx_data(struct task_struct *task, struct kmem_cache *ctx_cache,
bool global)
bool global, gfp_t gfp_flags)
{
struct perf_ctx_data *cd, *old = NULL;
cd = alloc_perf_ctx_data(ctx_cache, global);
cd = alloc_perf_ctx_data(ctx_cache, global, gfp_flags);
if (!cd)
return -ENOMEM;
@@ -5499,7 +5499,7 @@ attach_global_ctx_data(struct kmem_cache *ctx_cache)
return 0;
alloc:
ret = attach_task_ctx_data(p, ctx_cache, true);
ret = attach_task_ctx_data(p, ctx_cache, true, GFP_KERNEL);
put_task_struct(p);
if (ret) {
__detach_global_ctx_data();
@@ -5519,7 +5519,7 @@ attach_perf_ctx_data(struct perf_event *event)
return -ENOMEM;
if (task)
return attach_task_ctx_data(task, ctx_cache, false);
return attach_task_ctx_data(task, ctx_cache, false, GFP_KERNEL);
ret = attach_global_ctx_data(ctx_cache);
if (ret)
@@ -9240,7 +9240,7 @@ perf_event_alloc_task_data(struct task_struct *child,
return;
attach:
attach_task_ctx_data(child, ctx_cache, true);
attach_task_ctx_data(child, ctx_cache, true, GFP_KERNEL);
}
void perf_event_fork(struct task_struct *task)