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From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Jiri Olsa <jolsa@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	lkml <linux-kernel@vger.kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	David Ahern <dsahern@gmail.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Milind Chabbi <chabbi.milind@gmail.com>,
	Oleg Nesterov <oleg@redhat.com>
Subject: Re: [PATCHv4 0/5] perf/hw_breakpoint: Fix breakpoint modify
Date: Thu, 30 Aug 2018 15:39:05 -0300
Message-ID: <20180830183905.GG6097@kernel.org> (raw)
In-Reply-To: <20180827091228.2878-1-jolsa@kernel.org>

Em Mon, Aug 27, 2018 at 11:12:23AM +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.
> 
> I ran strace tests, nothing (new) broken there..

Thanks, tested and applied.

- Arnaldo

      parent reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-27  9:12 Jiri Olsa
2018-08-27  9:12 ` [PATCH 1/5] perf tests: Add breakpoint modify tests Jiri Olsa
2018-09-06 13:01   ` [tip:perf/core] " tip-bot for Jiri Olsa
2018-08-27  9:12 ` [PATCH 2/5] perf/hw_breakpoint: Modify breakpoint even if the new attr has disabled set Jiri Olsa
2018-09-06 13:02   ` [tip:perf/core] " tip-bot for Jiri Olsa
2018-08-27  9:12 ` [PATCH 3/5] perf/hw_breakpoint: Remove superfluous bp->attr.disabled = 0 Jiri Olsa
2018-09-06 13:02   ` [tip:perf/core] " tip-bot for Jiri Olsa
2018-08-27  9:12 ` [PATCH 4/5] perf/hw_breakpoint: Enable breakpoint in modify_user_hw_breakpoint Jiri Olsa
2018-09-06 13:03   ` [tip:perf/core] " tip-bot for Jiri Olsa
2018-08-27  9:12 ` [PATCH 5/5] perf/hw_breakpoint: Simplify breakpoint enable in perf_event_modify_breakpoint Jiri Olsa
2018-09-06 13:03   ` [tip:perf/core] " tip-bot for Jiri Olsa
2018-08-30 18:39 ` Arnaldo Carvalho de Melo [this message]

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