linux-kernel - Re: [PATCH/RFC 1/2] init/initramfs.c: allow asynchronous unpacking

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Message-ID: <CAHk-=wgw1Eg9kDGUiEY6EL+6dTC8tVqAhstvcmUBgrF5hdoApQ@mail.gmail.com>
Date:   Wed, 24 Feb 2021 09:17:13 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Corbet <corbet@....net>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH/RFC 1/2] init/initramfs.c: allow asynchronous unpacking

On Wed, Feb 24, 2021 at 6:29 AM Rasmus Villemoes
<linux@...musvillemoes.dk> wrote:
>
> So add an initramfs_async= kernel parameter, allowing the main init
> process to proceed to handling device_initcall()s without waiting for
> populate_rootfs() to finish.

Hmm. This is why we have the whole "async_schedule()" thing (mostly
used for things like disk spin-up etc). Is there some reason you
didn't use that infrastructure?

           Linus