linux-kernel - Re: [PATCH v2 0/2] allow overlayfs to do RCU lookups

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Date:   Wed, 18 Aug 2021 17:03:27 +0200
From:   Miklos Szeredi <miklos@...redi.hu>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Miklos Szeredi <mszeredi@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        overlayfs <linux-unionfs@...r.kernel.org>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andreas Gruenbacher <agruenba@...hat.com>
Subject: Re: [PATCH v2 0/2] allow overlayfs to do RCU lookups

On Wed, 18 Aug 2021 at 16:27, Al Viro <viro@...iv.linux.org.uk> wrote:
>
> On Wed, Aug 18, 2021 at 03:33:58PM +0200, Miklos Szeredi wrote:
> > I'd really like to fix this in some form, but not getting any response
> > [1][2][3].
> >
> > Al, Linus, can you please comment?
> >
> > I'm happy to take this through the overlayfs tree, just need an ACK for the
> > VFS API change.
>
> Looks reasonable enough; I'm not too happy about yet another place LOOKUP_...
> details get tangled into, though.  Do we want it to be more than just a
> bool rcu?

I'd be fine with that change.   Calling with false/true is less
descriptive than calling with 0/LOOKUP_RCU but I guess we can leave
the actual calls to use the latter?

Thanks,
Miklos