linux-kernel - Re: [PATCH v1 00/10] Move uid filtering to BPF filters

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Message-ID: <CAP-5=fUrzPvV3sD1_wMzQ7dF8xk3hL9_nkdS6toFjt7L+SRsgg@mail.gmail.com>
Date: Wed, 12 Feb 2025 12:00:42 -0800
From: Ian Rogers <irogers@...gle.com>
To: Namhyung Kim <namhyung@...nel.org>
Cc: 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>, 
	Hao Ge <gehao@...inos.cn>, James Clark <james.clark@...aro.org>, 
	Howard Chu <howardchu95@...il.com>, Dominique Martinet <asmadeus@...ewreck.org>, 
	Levi Yun <yeoreum.yun@....com>, Xu Yang <xu.yang_2@....com>, 
	Tengda Wu <wutengda@...weicloud.com>, Yang Jihong <yangjihong1@...wei.com>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 00/10] Move uid filtering to BPF filters

On Wed, Feb 12, 2025 at 10:46 AM Namhyung Kim <namhyung@...nel.org> wrote:
> It's not completely broken and works sometimes.

No this is the definition of completely broken. If it only works
sometimes then you can't use it, we can't put a test on it, there is
no point in it. Even when it doesn't fail on perf_event_open, does it
work for processes that start after /proc is scanned? No, it is
completely broken.

Thanks,
Ian