linux-kernel - Re: Upcoming: Notifications, FS notifications and fsinfo()

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Message-ID: <20200401144109.GA29945@gardel-login>
Date:   Wed, 1 Apr 2020 16:41:09 +0200
From:   Lennart Poettering <mzxreary@...inter.de>
To:     David Howells <dhowells@...hat.com>
Cc:     Christian Brauner <christian.brauner@...ntu.com>,
        torvalds@...ux-foundation.org, viro@...iv.linux.org.uk,
        dray@...hat.com, kzak@...hat.com, mszeredi@...hat.com,
        swhiteho@...hat.com, jlayton@...hat.com, raven@...maw.net,
        andres@...razel.de, keyrings@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        cyphar@...har.com
Subject: Re: Upcoming: Notifications, FS notifications and fsinfo()

On Di, 31.03.20 22:52, David Howells (dhowells@...hat.com) wrote:

> Christian Brauner <christian.brauner@...ntu.com> wrote:
>
> > querying all properties of a mount atomically all-at-once,
>
> I don't actually offer that, per se.
>
> Having an atomic all-at-once query for a single mount is actually quite a
> burden on the system.  There's potentially a lot of state involved, much of
> which you don't necessarily need.

Hmm, do it like with statx() and specify a mask for the fields userspace
wants? Then it would be as lightweight as it possibly could be?

Lennart

--
Lennart Poettering, Berlin