linux-kernel - Re: [PATCH v1] perf parse-events: Fix parsing of >30kb event strings

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Message-ID: <aOEZ_HOcIMggsebi@x1>
Date: Sat, 4 Oct 2025 09:58:36 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
	Namhyung Kim <namhyung@...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
Subject: Re: [PATCH v1] perf parse-events: Fix parsing of >30kb event strings

On Fri, Oct 03, 2025 at 02:25:39PM -0700, Ian Rogers wrote:
> On Wed, Sep 17, 2025 at 11:05 AM Ian Rogers <irogers@...gle.com> wrote:
> > On Thu, Sep 4, 2025 at 9:26 PM Ian Rogers <irogers@...gle.com> wrote:
> > > Whilst cleaning up "%option reject" make the header files accurately
> > > reflect functions used in the code and tidy up not requiring yywrap.

> > > Measuring on the "PMU JSON event tests" a modest reduction of 0.41%
> > > user time and 0.27% max resident size was observed. More importantly
> > > this change fixes parsing large metrics and event strings.

> > Ping. I think this may have gotten lost in noise about things like
> > hardware json and the python metrics. It is a small change, bug fix
> > and performance win. It can land independently of anything else. PTAL.
 
> It'd be nice to land this for the v6.18 pull. I don't think it has any
> visible implications and just makes stuff better.

Applied and now testing on the container build set.

- Arnaldo