diff mbox series

[bpf-next] samples/bpf: tracex4: Fix failed to create kretprobe 'kmem_cache_alloc_node+0x0'

Message ID tencent_34E5BCCAC5ABF3E81222AD81B1D05F16DE06@qq.com (mailing list archive)
State Accepted
Commit d205d4af3a5ee840edecfa5f6b389d7d03b0786d
Delegated to: BPF
Headers show
Series [bpf-next] samples/bpf: tracex4: Fix failed to create kretprobe 'kmem_cache_alloc_node+0x0' | expand

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Commit Message

Rong Tao Aug. 27, 2024, 4:30 a.m. UTC 
From: Rong Tao <rongtao@cestc.cn>

commit 7bd230a26648 ("mm/slab: enable slab allocation tagging for kmalloc
and friends") [1] swap kmem_cache_alloc_node() to
kmem_cache_alloc_node_noprof().

    linux/samples/bpf$ sudo ./tracex4
    libbpf: prog 'bpf_prog2': failed to create kretprobe
    'kmem_cache_alloc_node+0x0' perf event: No such file or directory
    ERROR: bpf_program__attach failed

Link: https://github.com/torvalds/linux/commit/7bd230a26648ac68ab3731ebbc449090f0ac6a37
Signed-off-by: Rong Tao <rongtao@cestc.cn>
---
 samples/bpf/tracex4.bpf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org Aug. 27, 2024, 11:20 p.m. UTC | #1 
Hello:

This patch was applied to bpf/bpf-next.git (master)
by Andrii Nakryiko <andrii@kernel.org>:

On Tue, 27 Aug 2024 12:30:30 +0800 you wrote:
> From: Rong Tao <rongtao@cestc.cn>
> 
> commit 7bd230a26648 ("mm/slab: enable slab allocation tagging for kmalloc
> and friends") [1] swap kmem_cache_alloc_node() to
> kmem_cache_alloc_node_noprof().
> 
>     linux/samples/bpf$ sudo ./tracex4
>     libbpf: prog 'bpf_prog2': failed to create kretprobe
>     'kmem_cache_alloc_node+0x0' perf event: No such file or directory
>     ERROR: bpf_program__attach failed
> 
> [...]

Here is the summary with links:
  - [bpf-next] samples/bpf: tracex4: Fix failed to create kretprobe 'kmem_cache_alloc_node+0x0'
    https://git.kernel.org/bpf/bpf-next/c/d205d4af3a5e

You are awesome, thank you!
diff mbox series

Patch

diff --git a/samples/bpf/tracex4.bpf.c b/samples/bpf/tracex4.bpf.c
index ca826750901a..d786492fd926 100644
--- a/samples/bpf/tracex4.bpf.c
+++ b/samples/bpf/tracex4.bpf.c
@@ -33,13 +33,13 @@  int bpf_prog1(struct pt_regs *ctx)
 	return 0;
 }
 
-SEC("kretprobe/kmem_cache_alloc_node")
+SEC("kretprobe/kmem_cache_alloc_node_noprof")
 int bpf_prog2(struct pt_regs *ctx)
 {
 	long ptr = PT_REGS_RC(ctx);
 	long ip = 0;
 
-	/* get ip address of kmem_cache_alloc_node() caller */
+	/* get ip address of kmem_cache_alloc_node_noprof() caller */
 	BPF_KRETPROBE_READ_RET_IP(ip, ctx);
 
 	struct pair v = {