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Re: [PATCH] fs/ext2: Ignore checksum seed incompat feature support

From: Daniel Kiper
Subject: Re: [PATCH] fs/ext2: Ignore checksum seed incompat feature support
Date: Wed, 7 Jul 2021 15:22:17 +0200
User-agent: NeoMutt/20170113 (1.7.2)

On Fri, Jun 11, 2021 at 09:36:16PM +0200, Javier Martinez Canillas wrote:
> This incompat feature is used to denote that the filesystem stored its
> metadata checksum seed in the superblock. This is used to allow tune2fs
> to change the UUID on a mounted metadata_csum filesystem without having
> to rewrite all the disk metadata.
> But GRUB doesn't use the metadata checksum in anyway, so can just ignore
> this feature if is enabled. This is consistent with GRUB filesystem code
> in general which just does a best effort to access the filesystem's data.
> It may be removed from the ignored list in the future if supports to do
> metadata checksumming verification is added to the read-only FS driver.
> Suggested-by: Eric Sandeen <>
> Suggested-by: Lukas Czerner <>
> Signed-off-by: Javier Martinez Canillas <>

Reviewed-by: Daniel Kiper <>


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