On 06/19, Oleg Nesterov wrote:
>
> So. I'll resend this series, will you ack the v2 below?
Also. Could you please review the new patch I am going to include
into this series?
This is copy-and-paste of 32520b2c6 which you reviewed and acked.
And please note that kprobes is the last user of
perf_trace_buf_submit(addr != 0), we can make some cleanups on top.
-------------------------------------------------------------------------------
Subject: [PATCH] tracing/kprobes: Don't pass addr=ip to perf_trace_buf_submit()
kprobe_perf_func() and kretprobe_perf_func() pass addr=ip to
perf_trace_buf_submit() for no reason.
This sets perf_sample_data->addr for PERF_SAMPLE_ADDR, we already
have perf_sample_data->ip initialized if PERF_SAMPLE_IP.
Signed-off-by: Oleg Nesterov <o...@redhat.com>
---
kernel/trace/trace_kprobe.c | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 3432652..141c682 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1163,8 +1163,7 @@ kprobe_perf_func(struct trace_probe *tp, struct pt_regs
*regs)
entry->ip = (unsigned long)tp->rp.kp.addr;
memset(&entry[1], 0, dsize);
store_trace_args(sizeof(*entry), tp, regs, (u8 *)&entry[1], dsize);
- perf_trace_buf_submit(entry, size, rctx,
- entry->ip, 1, regs, head, NULL);
+ perf_trace_buf_submit(entry, size, rctx, 0, 1, regs, head, NULL);
}
/* Kretprobe profile handler */
@@ -1197,8 +1196,7 @@ kretprobe_perf_func(struct trace_probe *tp, struct
kretprobe_instance *ri,
entry->func = (unsigned long)tp->rp.kp.addr;
entry->ret_ip = (unsigned long)ri->ret_addr;
store_trace_args(sizeof(*entry), tp, regs, (u8 *)&entry[1], dsize);
- perf_trace_buf_submit(entry, size, rctx,
- entry->ret_ip, 1, regs, head, NULL);
+ perf_trace_buf_submit(entry, size, rctx, 0, 1, regs, head, NULL);
}
#endif /* CONFIG_PERF_EVENTS */
--
1.5.5.1
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