linux-kernel - Re: [RFC v2 5/5] shmem: add support to ignore swap

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Message-ID: <Y/eDOXC4+vpCCBic@infradead.org>
Date:   Thu, 23 Feb 2023 07:16:09 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Christian Brauner <brauner@...nel.org>
Cc:     Luis Chamberlain <mcgrof@...nel.org>, hughd@...gle.com,
        akpm@...ux-foundation.org, willy@...radead.org, linux-mm@...ck.org,
        p.raghav@...sung.com, dave@...olabs.net, a.manzanares@...sung.com,
        yosryahmed@...gle.com, linux-kernel@...r.kernel.org
Subject: Re: [RFC v2 5/5] shmem: add support to ignore swap

On Thu, Feb 23, 2023 at 01:26:31PM +0100, Christian Brauner wrote:
> We would have use-cases for this in systemd. We currently use ramfs for
> systemd's credential logic since ramfs is unswappable. It'd be very neat
> if we could use tmpfs instead,

What is the advantage of using a swapless tmpfs over ramf?