linux-kernel - Re: [PATCH 2/2] statx: move STATX_ATTR_DAX attribute handling to filesystems

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Message-ID: <286508.1606843256@warthog.procyon.org.uk>
Date:   Tue, 01 Dec 2020 17:20:56 +0000
From:   David Howells <dhowells@...hat.com>
To:     Eric Sandeen <sandeen@...hat.com>
Cc:     dhowells@...hat.com, torvalds@...ux-foundation.org,
        Miklos Szeredi <mszeredi@...hat.com>,
        Ira Weiny <ira.weiny@...el.com>, linux-fsdevel@...r.kernel.org,
        linux-man@...r.kernel.org, linux-kernel@...r.kernel.org,
        xfs <linux-xfs@...r.kernel.org>, linux-ext4@...r.kernel.org,
        Xiaoli Feng <xifeng@...hat.com>
Subject: Re: [PATCH 2/2] statx: move STATX_ATTR_DAX attribute handling to filesystems

Eric Sandeen <sandeen@...hat.com> wrote:

> -	if (IS_DAX(inode))
> -		stat->attributes |= STATX_ATTR_DAX;
> -

This could probably be left in and not distributed amongst the filesytems
provided that any filesystem that might turn it on sets the bit in the
attributes_mask.

I'm presuming that the core doesn't turn it on without the filesystem buying
in.

David