linux-kernel - Re: [PATCH 8/8] gfs2: use lockref_init for qd

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Message-ID: <CAHc6FU6EpaAyzFPdJUa97ZZP76PHxJb-vP8+tzcZFRYT5bZeGQ@mail.gmail.com>
Date: Mon, 20 Jan 2025 16:44:59 +0100
From: Andreas Gruenbacher <agruenba@...hat.com>
To: Christian Brauner <brauner@...nel.org>
Cc: Christoph Hellwig <hch@....de>, Andrew Morton <akpm@...ux-foundation.org>, 
	Al Viro <viro@...iv.linux.org.uk>, Gao Xiang <xiang@...nel.org>, Chao Yu <chao@...nel.org>, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-erofs@...ts.ozlabs.org, gfs2@...ts.linux.dev
Subject: Re: [PATCH 8/8] gfs2: use lockref_init for qd_lockref

On Mon, Jan 20, 2025 at 4:25 PM Christian Brauner <brauner@...nel.org> wrote:
> On Fri, Jan 17, 2025 at 05:03:51PM +0100, Andreas Gruenbacher wrote:
> > On Thu, 16 Jan 2025 05:32:26 +0100, Christoph Hellwig <hch@....de> wrote:
> > > Well, if you can fix it to start with 1 we could start out with 1
> > > as the default.  FYI, I also didn't touch the other gfs2 lockref
> > > because it initialize the lock in the slab init_once callback and
> > > the count on every initialization.
> >
> > Sure, can you add the below patch before the lockref_init conversion?
> >
> > Thanks,
> > Andreas
> >
> > --
> >
> > gfs2: Prepare for converting to lockref_init
> >
> > First, move initializing the glock lockref spin lock from
> > gfs2_init_glock_once() to gfs2_glock_get().
> >
> > Second, in qd_alloc(), initialize the lockref count to 1 to cover the
> > common case.  Compensate for that in gfs2_quota_init() by adjusting the
> > count back down to 0; this case occurs only when mounting the filesystem
> > rw.
> >
> > Signed-off-by: Andreas Gruenbacher <agruenba@...hat.com>
> > ---
>
> Can you send this as a proper separae patch, please?

Do you want this particular version which applies before Christoph's
patches or something that applies on top of Christoph's patches?

Thanks,
Andreas