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Date: Wed, 29 Nov 2023 01:09:13 +0500
From: Roman Mamedov <rm@romanrm.net>
To: Qu Wenruo <wqu@suse.com>
Cc: Hector Martin <marcan@marcan.st>, Josef Bacik <josef@toxicpanda.com>,
 Neal Gompa <neal@gompa.dev>, Linux BTRFS Development
 <linux-btrfs@vger.kernel.org>, Anand Jain <anand.jain@oracle.com>, Qu
 Wenruo <quwenruo.btrfs@gmx.com>, David Sterba <dsterba@suse.cz>, Sven Peter
 <sven@svenpeter.dev>, Davide Cavalca <davide@cavalca.name>, Jens Axboe
 <axboe@fb.com>, Asahi Lina <lina@asahilina.net>, Asahi Linux
 <asahi@lists.linux.dev>
Subject: Re: [PATCH v4 0/1] Enforce 4k sectorize by default for mkfs
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On Wed, 29 Nov 2023 06:27:26 +1030
Qu Wenruo <wqu@suse.com> wrote:

> > Reminder that the Raspberry Pi 5 is also shipping with 16K pages by
> > default now. The clock is ticking for an ever-growing stream of people
> > upset that they can't mount/data-rescue/etc their rPi5 NAS disks from an
> > x86 machine ;)
> 
> As long as they are using 5.15+ kernel, they should be able to mount and 
> use their RPI NAS with disks from x86 machines.

Doesn't the subpage sectorsize featureset only support sectors less than page
size, not the other way round?

"mkfs.btrfs -s 16K" fails to mount on 6.1.62:

[1077897.120376] BTRFS error (device dm-22): sectorsize 16384 not yet supported for page size 4096
[1077897.120624] BTRFS error (device dm-22): superblock contains fatal errors
[1077897.121394] BTRFS error (device dm-22): open_ctree failed

-- 
With respect,
Roman