linux-kernel - Re: [PATCH v6 8/8] btrfs: set the appropriate free space settings in reconfigure

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Message-ID: <CAPjX3FcKLCB877RZr=NdGK62i01ufGJvfJzGQ-v2+i-kfzEnBg@mail.gmail.com>
Date: Thu, 13 Nov 2025 12:24:33 +0100
From: Daniel Vacek <neelx@...e.com>
To: dsterba@...e.cz
Cc: Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>, David Sterba <dsterba@...e.com>, 
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 8/8] btrfs: set the appropriate free space settings in reconfigure

On Thu, 13 Nov 2025 at 11:32, David Sterba <dsterba@...e.cz> wrote:
> On Wed, Nov 12, 2025 at 08:36:08PM +0100, Daniel Vacek wrote:
> > From: Josef Bacik <josef@...icpanda.com>
> >
> > btrfs/330 uncovered a problem where we were accidentally turning off the
> > free space tree when we do the transition from ro->rw.  This happens
> > because we don't update
>
> Missing text.

Hmm, this patch is new to v5. It doesn't even look encryption related.
I have no idea what Josef really means here.

The whole idea seems to be to call
btrfs_set_free_space_cache_settings() from btrfs_reconfigure() and to
update the ctx->mount_opt instead of fs_info->mount_opt while
remounting.

And btrfs/330 is not failing even with the full patchset applied
without this patch. I'm wondering if it is still needed after those
years?