linux-kernel - Re: [PATCH v6 3/6] Uprobes: Support SDT markers having reference count (semaphore)

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Message-ID: <20180727135929.GB3618@redhat.com>
Date:   Fri, 27 Jul 2018 15:59:30 +0200
From:   Oleg Nesterov <oleg@...hat.com>
To:     Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Cc:     srikar@...ux.vnet.ibm.com, rostedt@...dmis.org,
        mhiramat@...nel.org, peterz@...radead.org, mingo@...hat.com,
        acme@...nel.org, alexander.shishkin@...ux.intel.com,
        jolsa@...hat.com, namhyung@...nel.org,
        linux-kernel@...r.kernel.org, ananth@...ux.vnet.ibm.com,
        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 v6 3/6] Uprobes: Support SDT markers having reference
 count (semaphore)

On 07/24, Ravi Bangoria wrote:
>
> > Perhaps we can even add another flag later, MMF_HAS_DELAYED_UPROBES set by
> > delayed_uprobe_add().
>
> Yes, good idea.

But let me repeat, lets do this later. We can do even better I think, say,
move this delaed-list into uprobes_state. But imo the 1st version can just
check MMF_HAS_UPROBES because this is simple, obviously correct, and can
actually help.

Oleg.