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
Date: Tue, 28 Aug 2018 11:25:40 -0300 [thread overview]
Message-ID: <20180828142540.GI22309@kernel.org> (raw)
In-Reply-To: <20180809120305.20693-1-jolsa@kernel.org>
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
prev parent reply other threads:[~2018-08-28 14:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-09 12:03 [PATCHv2 0/5] perf/hw_breakpoint: Fix breakpoint modify Jiri Olsa
2018-08-09 12:03 ` [PATCH 1/5] perf tests: Add breakpoint modify tests Jiri Olsa
2018-08-09 12:03 ` [PATCH 2/5] perf/hw_breakpoint: Modify breakpoint even if the new attr has disabled set Jiri Olsa
2018-08-09 12:03 ` [PATCH 3/5] perf/hw_breakpoint: Remove superfluous bp->attr.disabled = 0 Jiri Olsa
2018-08-09 13:59 ` Oleg Nesterov
2018-08-09 12:03 ` [PATCH 4/5] perf/hw_breakpoint: Set breakpoint as disabled in modify_user_hw_breakpoint error path Jiri Olsa
2018-08-09 14:17 ` Oleg Nesterov
2018-08-09 16:30 ` Jiri Olsa
2018-08-28 14:29 ` Arnaldo Carvalho de Melo
2018-08-28 14:38 ` Jiri Olsa
2018-08-28 14:39 ` Arnaldo Carvalho de Melo
2018-08-09 12:03 ` [PATCH 5/5] perf/hw_breakpoint: Add fallback code for ptrace_set_breakpoint_addr Jiri Olsa
2018-08-28 14:25 ` Arnaldo Carvalho de Melo [this message]
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