linux-kernel - Re: [PATCH v5 0/4] vm: add a syscall to map a process memory into a pipe

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Message-Id: <20180220164406.3ec34509376f16841dc66e34@linux-foundation.org>
Date:   Tue, 20 Feb 2018 16:44:06 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Mike Rapoport <rppt@...ux.vnet.ibm.com>
Cc:     Alexander Viro <viro@...iv.linux.org.uk>, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-api@...r.kernel.org, criu@...nvz.org, gdb@...rceware.org,
        devel@...ts.open-mpi.org, rr-dev@...illa.org,
        Arnd Bergmann <arnd@...db.de>,
        Pavel Emelyanov <xemul@...tuozzo.com>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Josh Triplett <josh@...htriplett.org>,
        Jann Horn <jannh@...gle.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Andrei Vagin <avagin@...nvz.org>
Subject: Re: [PATCH v5 0/4] vm: add a syscall to map a process memory into a
 pipe

On Tue,  9 Jan 2018 08:30:49 +0200 Mike Rapoport <rppt@...ux.vnet.ibm.com> wrote:

> This patches introduces new process_vmsplice system call that combines
> functionality of process_vm_read and vmsplice.

All seems fairly strightforward.  The big question is: do we know that
people will actually use this, and get sufficient value from it to
justify its addition?