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Date:   Tue, 28 Aug 2018 11:25:40 -0300
From:   Arnaldo Carvalho de Melo <acme@kernel.org>
To:     Jiri Olsa <jolsa@kernel.org>
Cc:     lkml <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        David Ahern <dsahern@gmail.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Milind Chabbi <chabbi.milind@gmail.com>,
        Oleg Nesterov <oleg@redhat.com>,
        Frederic Weisbecker <frederic@kernel.org>
Subject: Re: [PATCHv2 0/5] perf/hw_breakpoint: Fix breakpoint modify
Message-ID: <20180828142540.GI22309@kernel.org>
References: <20180809120305.20693-1-jolsa@kernel.org>
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Em Thu, Aug 09, 2018 at 02:03:00PM +0200, Jiri Olsa escreveu:
> hi,
> Milind reported that modify_user_hw_breakpoint wouldn't
> allow the breakpoint changing if the new attr had 'disabled'
> set to true.
> 
> I found a case where it actualy prevents ptrace user interface
> to change the breakpoint. It's described in patch 1 as perf test,
> patch 2 is the breakpoint code fix.

Going over these patches now, applying the test, running it, then the
kernel bits, reboot, retest, etc.

- Arnaldo