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From: Namhyung Kim <namhyung@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>, 
 Arnaldo Carvalho de Melo <acme@kernel.org>, Jiri Olsa <jolsa@kernel.org>, 
 Adrian Hunter <adrian.hunter@intel.com>, 
 James Clark <james.clark@linaro.org>, Jiawei Sun <abyssmystery@gmail.com>, 
 linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, 
 Ian Rogers <irogers@google.com>
In-Reply-To: <20260710053927.1864021-1-irogers@google.com>
References: <20260710053927.1864021-1-irogers@google.com>
Subject: Re: (subset) [PATCH v1 1/2] perf record: Fix teardown hang on
 system-wide multi-threaded sessions
Message-Id: <178383937332.3162711.15710064516636108862.b4-ty@kernel.org>
Date: Sat, 11 Jul 2026 23:56:13 -0700
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On Thu, 09 Jul 2026 22:39:06 -0700, Ian Rogers wrote:
> Under system-wide (-a) parallel streaming mode (--threads=cpu),
> background recording threads can be inundated by a continuous
> firehose of hardware samples generated by the OS. In this state,
> a background thread's local hit count remains unequal to its
> sample count, causing it to bypass the blocking fdarray__poll()
> call entirely on each iteration of its recording loop.
> 
> [...]
Applied to perf-tools-next, thanks!

Best regards,
Namhyung