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Date: Thu, 4 Jun 2026 09:28:39 -0700
From: Namhyung Kim <namhyung@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ian Rogers <irogers@google.com>, Jiri Olsa <jolsa@kernel.org>,
	Adrian Hunter <adrian.hunter@intel.com>,
	James Clark <james.clark@linaro.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
	linux-perf-users@vger.kernel.org, Chun-Tse Shao <ctshao@google.com>,
	Suchit Karunakaran <suchitkarunakaran@gmail.com>
Subject: Re: [PATCH v2] perf lock contention: Allow 'mmap_lock' in
 -L/--lock-filter
Message-ID: <aiGnt_xUewsAYP2y@google.com>
References: <20260505231136.691907-1-namhyung@kernel.org>
 <aiGGmN0jIsTHgUJH@x1>
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In-Reply-To: <aiGGmN0jIsTHgUJH@x1>

On Thu, Jun 04, 2026 at 11:07:20AM -0300, Arnaldo Carvalho de Melo wrote:
> On Tue, May 05, 2026 at 04:11:35PM -0700, Namhyung Kim wrote:
> > The -L/--lock-filter option is to specify target locks by name or
> > address.  It's basically for global locks where name or address is known
> > and fixed.  But 'mmap_lock' is a per-process lock so it cannot be used
> > for the -L option.
> > 
> >   $ sudo perf lock con -ab -L mmap_lock
> >   ignore unknown symbol: mmap_lock
> >   libbpf: map 'addr_filter': failed to create: -EINVAL
> >   libbpf: failed to load BPF skeleton 'lock_contention_bpf': -EINVAL
> >   Failed to load lock-contention BPF skeleton
> >   lock contention BPF setup failed
> 
> Hi,
> 
> 	Did this fell thru the cracks? :-)
 
Will check and send v3 soon.

Thanks,
Namhyung