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From:   =?utf-8?Q?Ren=C3=A9_Rebe?= <rene@exactcode.com>
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Subject: Vectored syscalls Was: [PATCH 0/3] readfile(2): a new syscall to make
 open/read/close faster
Message-Id: <3ADE6606-6572-4D7D-BB8F-9286B368DF93@exactcode.com>
Date:   Wed, 8 Jul 2020 17:16:41 +0200
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        viro@zeniv.linux.org
To:     linux-kernel@vger.kernel.org
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hey there,

maybe instead of this rather specific, niche readfile syscall, would it =
not be beneficial
to allow issuing any group or bundle of several arbitrary system calls =
so this could also
be used to speed up other, more demanding high performance applications =
that need
a bit more than just readfile()?

An iImplementation could use some SYSCALLV syscall taking some io_uring =
like
structure with a list of flags, syscalls and arguments, so that this =
case could be submitted
as something like (illustration purposes only):

{
	{ABORT_ON_ERROR, OPEN, =E2=80=A6},
	{RET_TO_ARG1, READ, =E2=80=A6},
	{0, CLOSE, =E2=80=A6},
}

I hope that sounds useful,
	Ren=C3=A9 Rebe

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