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

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Message-ID: <20250120-tragbar-ertrinken-24f2bbc2beb4@brauner>
Date: Mon, 20 Jan 2025 16:25:19 +0100
From: Christian Brauner <brauner@...nel.org>
To: Andreas Gruenbacher <agruenba@...hat.com>
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 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?