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Tue, 3 Mar 2026 05:07:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A9718C116C6; Tue, 3 Mar 2026 05:07:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772514459; bh=1+kKr9w9x1B4o6FcZ1XAvN36pB8iYMy5wzHr3wwx+6k=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=tdQvKpp2K/r35zCm0W6gRUwl4ZY8UaHyBvOYJzXsf+L4J1r9LKC9hjhf65BPuwGyT yFqYzMK3vuokKly0l+YjMr6k9NLrJqehKXW6ixHMLnjx0Td9v48Id/KH88HW2Qr3dX gZJiIgJImQMR05aCpC/CSHA9uu2aW7xULTrYcoYfdKxDvrf0C89CM68j5f0Y2NBExz YAyM1VTwIUq9LfTSzFFm5csRWadKv1uqGQCDYG9T6IexWwAWJsxzPcOxhHI3l4l40n NJWMj2kZ6/NzBXgrX4gJu32wP6r0+aZ9FdYIT+GQetCDHQeo09ckyuhro60zCH/OPH AjlXlLdik735A== Date: Mon, 2 Mar 2026 21:06:44 -0800 To: fsverity@lists.linux.dev Message-ID: <20260303050644.GC5238@sol> References: <20260221204525.30426-1-ebiggers@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260221204525.30426-1-ebiggers@kernel.org> X-Headers-End: 1vxHz4-0001IK-DE Subject: Re: [f2fs-dev] [PATCH] fsverity: add dependency on 64K or smaller pages X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Eric Biggers via Linux-f2fs-devel Reply-To: Eric Biggers Cc: Arnd Bergmann , linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, Christoph Hellwig , linux-btrfs@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net 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 > Closes: https://lore.kernel.org/r/20260119063349.GA643@lst.de > Signed-off-by: Eric Biggers > --- > 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 Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel