From: Namhyung Kim <namhyung@kernel.org>
Date: Wed, 11 Feb 2026 22:32:19 +0000 (-0800)
Subject: perf/core: Pass GFP flags to attach_task_ctx_data()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=28c75fbfec8f024db1278194918e5f6eda4c570f;p=thirdparty%2Fkernel%2Flinux.git

perf/core: Pass GFP flags to attach_task_ctx_data()

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
---

diff --git a/kernel/events/core.c b/kernel/events/core.c
index ac70d68217b63..90b0c9324cbf7 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -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 @@ again:
 
 	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)