linux-kernel - Re: [PATCH v8 5/6] trace_uprobe/sdt: Prevent multiple reference counter for same uprobe

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Date:   Mon, 13 Aug 2018 09:27:36 -0700
From:   Song Liu <liu.song.a23@...il.com>
To:     Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc:     Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>, mhiramat@...nel.org,
        Peter Zijlstra <peterz@...radead.org>, mingo@...hat.com,
        acme@...nel.org, alexander.shishkin@...ux.intel.com,
        jolsa@...hat.com, namhyung@...nel.org,
        open list <linux-kernel@...r.kernel.org>,
        ananth@...ux.vnet.ibm.com,
        Alexis Berlemont <alexis.berlemont@...il.com>,
        naveen.n.rao@...ux.vnet.ibm.com,
        linux-arm-kernel@...ts.infradead.org, linux-mips@...ux-mips.org,
        linux@...linux.org.uk, ralf@...ux-mips.org, paul.burton@...s.com
Subject: Re: [PATCH v8 5/6] trace_uprobe/sdt: Prevent multiple reference
 counter for same uprobe

On Mon, Aug 13, 2018 at 1:49 AM, Srikar Dronamraju
<srikar@...ux.vnet.ibm.com> wrote:
> * Ravi Bangoria <ravi.bangoria@...ux.ibm.com> [2018-08-13 13:49:44]:
>
>> Hi Song,
>>
>> On 08/11/2018 01:42 PM, Song Liu wrote:
>> > Do we really need this given we already have PATCH 4/6?
>> > uprobe_regsiter() can be called
>> > out of trace_uprobe, this patch won't catch all conflicts anyway.
>>
>> Right but it, at least, catch all conflicts happening via trace_uprobe.
>>
>> I don't mind in removing this patch but I would like to get an opinion of
>> Oleg/Srikar/Steven/Masami.
>>
>
> I would suggest to keep it, atleast it can ctah conflicts happening via
> trace_uprobe.
>

Yeah, that makes sense.

Reviewed-by: Song Liu <songliubraving@...com>