linux-kernel - Re: [PATCH] perf/core: move all of the pmu devices into their own location

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <6edcf7f8-d496-524e-2250-49284dfb55e4@maine.edu>
Date: Tue, 4 Feb 2025 11:41:38 -0500 (EST)
From: Vince Weaver <vincent.weaver@...ne.edu>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
cc: "Liang, Kan" <kan.liang@...ux.intel.com>, 
    Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
    linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org, 
    Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
    Arnaldo Carvalho de Melo <acme@...nel.org>, 
    Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>, 
    Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
    Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH] perf/core: move all of the pmu devices into their own
 location

On Tue, 4 Feb 2025, Greg Kroah-Hartman wrote:

> 
> It seems that the majority of the perf code IS looking in the correct
> place, just mem-events.c seemed wrong.

I hate to tell you, but other places in userspace are depending on the 
current setup.  libpfm4, used by PAPI, is looking directly in /sys/devices 
for pmus and will break with the changes you are planning.

Vince Weaver
vincent.weaver@...ne.edu