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From: Namhyung Kim <namhyung@kernel.org>
To: linux-perf-users@vger.kernel.org, Viktor Malik <vmalik@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>, 
 Arnaldo Carvalho de Melo <acme@kernel.org>, 
 Mark Rutland <mark.rutland@arm.com>, 
 Alexander Shishkin <alexander.shishkin@linux.intel.com>, 
 Jiri Olsa <jolsa@kernel.org>, Ian Rogers <irogers@google.com>, 
 Adrian Hunter <adrian.hunter@intel.com>, 
 James Clark <james.clark@linaro.org>, Howard Chu <howardchu95@gmail.com>, 
 linux-kernel@vger.kernel.org, bpf@vger.kernel.org, 
 Michael Petlan <mpetlan@redhat.com>
In-Reply-To: <cover.1783406979.git.vmalik@redhat.com>
References: <cover.1783406979.git.vmalik@redhat.com>
Subject: Re: [PATCH v4 0/2] perf trace: Refactor augmented_raw_syscalls
 using bpf_for
Message-Id: <178431039627.131573.9801415792020925328.b4-ty@kernel.org>
Date: Fri, 17 Jul 2026 10:46:36 -0700
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On Tue, 07 Jul 2026 08:52:45 +0200, Viktor Malik wrote:
> The loop for processing syscall args in augment_raw_syscalls has a
> history of breaking with Clang updates. In the past, we've seen it break
> (i.e. stop passing the BPF verifier) between Clang 15 and 16 and now a
> similar thing happened between Clang 21 and 22. While the issue is
> mitigated on the main line by a recent verifier update, it remains
> broken on the 6.12 and 6.18 stable branches, effectively breaking
> `perf trace`.
> 
> [...]
Applied to perf-tools-next, thanks!

Best regards,
Namhyung