From d205d4af3a5ee840edecfa5f6b389d7d03b0786d Mon Sep 17 00:00:00 2001 From: Rong Tao Date: Tue, 27 Aug 2024 12:30:30 +0800 Subject: [PATCH] samples/bpf: tracex4: Fix failed to create kretprobe 'kmem_cache_alloc_node+0x0' 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 Signed-off-by: Rong Tao Signed-off-by: Andrii Nakryiko Link: https://github.com/torvalds/linux/commit/7bd230a26648ac68ab3731ebbc449090f0ac6a37 Link: https://lore.kernel.org/bpf/tencent_34E5BCCAC5ABF3E81222AD81B1D05F16DE06@qq.com --- samples/bpf/tracex4.bpf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/samples/bpf/tracex4.bpf.c b/samples/bpf/tracex4.bpf.c index ca826750901ae..d786492fd926f 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 = {