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Message-ID: <20190522135106.GA16275@worktop.programming.kicks-ass.net>
Date: Wed, 22 May 2019 15:51:06 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Song Liu <songliubraving@...com>
Cc: Kairui Song <kasong@...hat.com>, Alexei Starovoitov <ast@...com>,
lkml <linux-kernel@...r.kernel.org>,
Kernel Team <Kernel-team@...com>,
Josh Poimboeuf <jpoimboe@...hat.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
"bpf@...r.kernel.org" <bpf@...r.kernel.org>
Subject: Re: Getting empty callchain from perf_callchain_kernel()
On Mon, May 20, 2019 at 05:22:12PM +0000, Song Liu wrote:
> I think this is still the best fix/workaround here? And only one level
> of stack trace should be OK for tracepoint?
No. That's still completely broken.
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