linux-kernel - Re: [PATCH v4 13/18] selftests/nolibc: prepare /tmp for tmpfs or ramfs

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Date:   Sun, 9 Jul 2023 11:38:21 +0200
From:   Willy Tarreau <w@....eu>
To:     Zhangjin Wu <falcon@...ylab.org>
Cc:     arnd@...db.de, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, thomas@...ch.de,
        Thomas Weißschuh <linux@...ssschuh.net>
Subject: Re: [PATCH v4 13/18] selftests/nolibc: prepare /tmp for tmpfs or
 ramfs

Hi Zhangjin,

On Sat, Jul 08, 2023 at 02:38:57AM +0800, Zhangjin Wu wrote:
> create a /tmp directory and mount tmpfs there, if tmpfs is not
> mountable, use ramfs as tmpfs.
> 
> tmpfs will be used instead of procfs for some tests.

Just curious, in which cases do you need this ? We're building an
initramfs for the root that's already read-write, so without mounting
anything you already have write access. I'm taking it anyway for now,
but if you figure it's not needed we can later drop it (or just drop
the mount part and keep mkdir).

Willy