linux-kernel - Re: [PATCH v1 0/3] Fix and improve __maps__fixup_overlap_and

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Message-ID: <171778267657.3080367.600495538744784216.b4-ty@kernel.org>
Date: Fri,  7 Jun 2024 10:51:31 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: "Steinar H . Gunderson" <sesse@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Kan Liang <kan.liang@...ux.intel.com>,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ian Rogers <irogers@...gle.com>
Subject: Re: [PATCH v1 0/3] Fix and improve __maps__fixup_overlap_and_insert

On Tue, 21 May 2024 09:51:06 -0700, Ian Rogers wrote:

> Fix latent unlikely bugs in __maps__fixup_overlap_and_insert.
> 
> Improve __maps__fixup_overlap_and_insert's performance 21x in the case
> of overlapping mmaps. sesse@...gle.com reported slowness opening
> perf.data files from chromium where the files contained a large number
> of overlapping mappings. Improve this case primarily by avoiding
> unnecessary sorting.
> 
> [...]

Applied to perf-tools-next, thanks!

Best regards,
Namhyung