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From: Josh Triplett <josh@joshtriplett.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Christian Brauner <christian.brauner@ubuntu.com>,
	Nick Desaulniers <ndesaulniers@google.com>,
	alex.gaynor@gmail.com, Greg KH <gregkh@linuxfoundation.org>,
	geofft@ldpreload.com, jbaublitz@redhat.com,
	Masahiro Yamada <masahiroy@kernel.org>,
	Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	LKML <linux-kernel@vger.kernel.org>,
	clang-built-linux <clang-built-linux@googlegroups.com>,
	Kees Cook <keescook@chromium.org>
Subject: Re: Linux kernel in-tree Rust support
Date: Tue, 28 Jul 2020 23:34:17 -0700	[thread overview]
Message-ID: <20200729063417.GD286933@localhost> (raw)
In-Reply-To: <20200728204037.GC1012@bug>

On Tue, Jul 28, 2020 at 10:40:38PM +0200, Pavel Machek wrote:
> > We just need to make sure that any kernel CI infrastructure tests that
> > right away, then, so that failures don't get introduced by a patch from
> > someone without a Rust toolchain and not noticed until someone with a
> > Rust toolchain tests it.
> 
> So... I'm fan of Rust, but while trying to use it one thing was obvious: it
> takes _significantly_ longer than C to compile and needs gigabyte a lot of RAM.
> 
> Kernel is quite big project, can CI infrastructure handle additional load?
> 
> Will developers see significantly longer compile times when Rust is widespread?

I wouldn't expect the addition of Rust to the kernel to substantially
impact overall build time; on balance, I'd expect the major bottleneck
in kernel builds to continue to be linking and other serialized steps,
not compiling and other highly parallel steps.

There are also *many* things that can be done to improve Rust build time
in a project. And I don't expect that in-kernel Rust will have many
dependencies on third-party crates (since they'd need to be checked into
the tree).

  reply	other threads:[~2020-07-29  6:34 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-09 18:41 Linux kernel in-tree Rust support Nick Desaulniers
2020-07-09 20:52 ` Miguel Ojeda
2020-07-10  5:36 ` Josh Triplett
2020-07-10  6:28 ` Greg KH
2020-07-10 12:50   ` Christian Brauner
2020-07-10 16:10     ` Kees Cook
     [not found]       ` <CAFRnB2WNo45J8h3-ncopLKENvcO0rf7J3xsy_eRKwFSpDD-5sQ@mail.gmail.com>
2020-07-10 23:05         ` Kees Cook
2020-07-10 22:59     ` Josh Triplett
2020-07-10 23:54       ` Linus Torvalds
2020-07-11 21:03         ` Josh Triplett
2020-07-28 20:40           ` Pavel Machek
2020-07-29  6:34             ` Josh Triplett [this message]
2020-12-17 21:45               ` Pavel Machek
2020-12-18  3:31                 ` Miguel Ojeda
2020-07-11 17:13 ` Geoffrey Thomas
2020-07-12 12:31 ` Adrian Bunk
2020-07-12 19:39   ` Josh Triplett
2020-07-12 20:33     ` Linus Torvalds
2020-07-12 20:45     ` Adrian Bunk
2020-07-14  8:27       ` David Laight
2020-07-16 13:06     ` Arnd Bergmann
2020-07-16 23:12       ` Josh Triplett
2020-07-19 18:19       ` Adrian Bunk
2020-07-20 14:46         ` David Laight
2020-08-23 21:02     ` Adrian Bunk
2020-08-23 21:54       ` Geoffrey Thomas
2020-07-13 18:11 ` Eric W. Biederman
2020-07-13 21:33   ` Josh Triplett

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