From: Neal Gompa <neal@gompa.dev>
To: Linux BTRFS Development <linux-btrfs@vger.kernel.org>
Cc: Neal Gompa <neal@gompa.dev>, Anand Jain <anand.jain@oracle.com>,
Qu Wenruo <quwenruo.btrfs@gmx.com>, Qu Wenruo <wqu@suse.com>,
David Sterba <dsterba@suse.cz>, Hector Martin <marcan@marcan.st>,
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: [RFC PATCH v2 0/1] Enforce 4k sectorize by default for mkfs
Date: Tue, 21 Mar 2023 14:06:09 -0400 [thread overview]
Message-ID: <20230321180610.2620012-1-neal@gompa.dev> (raw)
The Fedora Asahi SIG[0] is working on bringing up support for
Apple Silicon Macintosh computers through the Asahi Fedora Remix[1].
Apple Silicon Macs are unusual in that they currently require 16k
page sizes, which means that the current default for mkfs.btrfs(8)
makes a filesystem that is unreadable on x86 PCs and most other ARM
PCs.
Soon, this will be even more of a problem within Apple Silicon Macs
as Asahi Lina is working on 4k support to enable x86 emulation[2]
and since Linux does not support dynamically switching page sizes at
runtime, users will likely regularly switch back and forth depending
on their needs.
Thus, I'd like to see us finally make the switchover to 4k sectorsize
for new filesystems by default, regardless of page size.
The initial test run by Hector Martin[3] at request of Qu Wenruo
looks promising[4], and I hope we can get this to land upstream soon.
This is an update on the initial RFC patch[5], which addresses the
documentation feedback from Anand Jain.
[0]: https://fedoraproject.org/wiki/SIGs/Asahi
[1]: https://asahi-fedora-remix.org/
[2]: https://vt.social/@lina/110060963422545117
[3]: https://lore.kernel.org/linux-btrfs/fdffeecd-964f-0c69-f869-eb9ceca20263@suse.com/T/#m11d7939de96c43b3a7cdabc7c568d8bcafc7ca83
[4]: https://lore.kernel.org/linux-btrfs/fdffeecd-964f-0c69-f869-eb9ceca20263@suse.com/T/#mf382b78a8122b0cb82147a536c85b6a9098a2895
[5]: https://lore.kernel.org/linux-btrfs/fdffeecd-964f-0c69-f869-eb9ceca20263@suse.com/T/#t
Neal Gompa (1):
btrfs-progs: mkfs: Enforce 4k sectorsize by default
Documentation/Subpage.rst | 15 ++++++++-------
Documentation/mkfs.btrfs.rst | 13 +++++++++----
mkfs/main.c | 2 +-
3 files changed, 18 insertions(+), 12 deletions(-)
--
2.39.2
next reply other threads:[~2023-03-21 18:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 18:06 Neal Gompa [this message]
2023-03-21 18:06 ` [RFC PATCH v2 1/1] btrfs-progs: mkfs: Enforce 4k sectorsize by default Neal Gompa
2023-03-22 2:43 ` Anand Jain
2023-03-22 2:25 ` [RFC PATCH v2 0/1] Enforce 4k sectorize by default for mkfs Qu Wenruo
2023-03-22 14:33 ` Josef Bacik
2023-03-22 17:11 ` Neal Gompa
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