linux-kernel - Re: Vectored syscalls Was: [PATCH 0/3] readfile(2): a new syscall to make open/read/close faster

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Message-ID: <20200708153859.GB715257@kroah.com>
Date:   Wed, 8 Jul 2020 17:38:59 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     René Rebe <rene@...ctcode.com>
Cc:     linux-kernel@...r.kernel.org, viro@...iv.linux.org
Subject: Re: Vectored syscalls Was: [PATCH 0/3] readfile(2): a new syscall to
 make open/read/close faster

On Wed, Jul 08, 2020 at 05:16:41PM +0200, René Rebe wrote:
> 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()?

Why not just use io_uring for that for I/O calls, that's what it is
designed for.

More "generic" syscall batching always ends up falling down in
complexity anytime anyone tries it.  Good luck!

greg k-h