On Sat, Feb 21, 2026 at 12:45:25PM -0800, Eric Biggers wrote:
> Currently, all filesystems that support fsverity (ext4, f2fs, and btrfs)
> cache the Merkle tree in the pagecache at a 64K aligned offset after the
> end of the file data. This offset needs to be a multiple of the page
> size, which is guaranteed only when the page size is 64K or smaller.
>
> 64K was chosen to be the "largest reasonable page size". But it isn't
> the largest *possible* page size: the hexagon and powerpc ports of Linux
> support 256K pages, though that configuration is rarely used.
>
> For now, just disable support for FS_VERITY in these odd configurations
> to ensure it isn't used in cases where it would have incorrect behavior.
>
> Fixes: 671e67b47e9f ("fs-verity: add Kconfig and the helper functions for
> hashing")
> Reported-by: Christoph Hellwig <[email protected]>
> Closes: https://lore.kernel.org/r/[email protected]
> Signed-off-by: Eric Biggers <[email protected]>
> ---
> fs/verity/Kconfig | 3 +++
> 1 file changed, 3 insertions(+)
Applied to
https://git.kernel.org/pub/scm/fs/fsverity/linux.git/log/?h=for-current
- Eric
_______________________________________________
Linux-f2fs-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
