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From: Peter Zijlstra <peterz@infradead.org>
To: Kairui Song <kasong@redhat.com>
Cc: Song Liu <songliubraving@fb.com>,
lkml <linux-kernel@vger.kernel.org>,
Kernel Team <Kernel-team@fb.com>,
Josh Poimboeuf <jpoimboe@redhat.com>
Subject: Re: Getting empty callchain from perf_callchain_kernel()
Date: Fri, 17 May 2019 11:10:44 +0200 [thread overview]
Message-ID: <20190517091044.GM2606@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <CACPcB9cB5n1HOmZcVpusJq8rAV5+KfmZ-Lxv3tgsSoy7vNrk7w@mail.gmail.com>
On Fri, May 17, 2019 at 04:15:39PM +0800, Kairui Song wrote:
> Hi, I think the actual problem is that bpf_get_stackid_tp (and maybe
> some other bfp functions) is now broken, or, strating an unwind
> directly inside a bpf program will end up strangely. It have following
> kernel message:
Urgh, what is that bpf_get_stackid_tp() doing to get the regs? I can't
follow.
next prev parent reply other threads:[~2019-05-17 9:10 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-16 23:51 Song Liu
2019-05-17 7:46 ` Peter Zijlstra
2019-05-17 8:10 ` Peter Zijlstra
2019-05-17 8:15 ` Kairui Song
2019-05-17 8:32 ` Kairui Song
2019-05-17 16:22 ` Song Liu
2019-05-17 9:10 ` Peter Zijlstra [this message]
2019-05-17 18:40 ` Song Liu
2019-05-17 21:06 ` Alexei Starovoitov
2019-05-17 21:48 ` Song Liu
2019-05-19 18:07 ` Kairui Song
2019-05-20 17:22 ` Song Liu
2019-05-22 13:51 ` Peter Zijlstra
2019-05-19 18:06 ` Kairui Song
2019-05-20 17:16 ` Song Liu
2019-05-20 17:19 ` Song Liu
2019-05-22 14:02 ` Peter Zijlstra
2019-05-22 14:49 ` Alexei Starovoitov
2019-05-22 17:45 ` Josh Poimboeuf
2019-05-22 23:46 ` Josh Poimboeuf
2019-05-23 6:48 ` Kairui Song
2019-05-23 8:27 ` Song Liu
2019-05-23 9:11 ` Kairui Song
2019-05-23 13:32 ` Josh Poimboeuf
2019-05-23 14:50 ` Kairui Song
2019-05-23 15:24 ` Josh Poimboeuf
2019-05-23 16:41 ` Kairui Song
2019-05-23 17:27 ` Josh Poimboeuf
2019-05-24 2:20 ` Kairui Song
2019-05-24 23:23 ` Josh Poimboeuf
2019-05-27 11:57 ` Kairui Song
2019-06-06 16:04 ` Song Liu
2019-06-06 23:58 ` Josh Poimboeuf
2019-06-11 21:03 ` Josh Poimboeuf
2019-05-24 8:53 ` Peter Zijlstra
2019-05-24 13:05 ` Josh Poimboeuf
2019-06-12 3:05 ` Josh Poimboeuf
2019-06-12 8:54 ` Peter Zijlstra
2019-06-12 14:50 ` Josh Poimboeuf
2019-06-13 20:26 ` Josh Poimboeuf
2019-06-12 13:10 ` Steven Rostedt
2019-06-12 14:26 ` Josh Poimboeuf
2019-05-22 18:07 ` Josh Poimboeuf
2019-05-22 21:55 ` Alexei Starovoitov
2019-05-17 16:32 ` Song Liu
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