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

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Message-Id: <66f84261-aa3e-4692-a124-09537fda4312@linux.ibm.com>
Date:   Mon, 13 Aug 2018 13:49:44 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
To:     Song Liu <liu.song.a23@...il.com>, srikar@...ux.vnet.ibm.com,
        Oleg Nesterov <oleg@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>, mhiramat@...nel.org
Cc:     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,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Subject: Re: [PATCH v8 5/6] trace_uprobe/sdt: Prevent multiple reference
 counter for same uprobe

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.

Thanks,
Ravi