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Date: Fri, 07 Jan 2022 15:55:51 +1100 From: Michael Ellerman <mpe@...erman.id.au> To: Qu Wenruo <quwenruo.btrfs@....com>, Neal Gompa <ngompa13@...il.com> Cc: Christophe Leroy <christophe.leroy@...roup.eu>, Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>, David Sterba <dsterba@...e.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linuxppc-dev@...ts.ozlabs.org, Btrfs BTRFS <linux-btrfs@...r.kernel.org>, linux-hexagon@...r.kernel.org, Hector Martin <marcan@...can.st> Subject: Re: [PATCH] fs: btrfs: Disable BTRFS on platforms having 256K pages Qu Wenruo <quwenruo.btrfs@....com> writes: > On 2022/1/7 00:31, Neal Gompa wrote: >> On Wed, Jan 5, 2022 at 7:05 AM Qu Wenruo <quwenruo.btrfs@....com> wrote: >>> >>> Hi Christophe, >>> >>> I'm recently enhancing the subpage support for btrfs, and my current >>> branch should solve the problem for btrfs to support larger page sizes. >>> >>> But unfortunately my current test environment can only provide page size >>> with 64K or 4K, no 16K or 128K/256K support. >>> >>> Mind to test my new branch on 128K page size systems? >>> (256K page size support is still lacking though, which will be addressed >>> in the future) >>> >>> https://github.com/adam900710/linux/tree/metadata_subpage_switch >>> >> >> The Linux Asahi folks have a 16K page environment (M1 Macs)... > > Su Yue kindly helped me testing 16K page size, and it's pretty OK there. > > So I'm not that concerned. > > It's 128K page size that I'm a little concerned, and I have not machine > supporting that large page size to do the test. Did Christophe say he had a 128K system to test on? In mainline powerpc only supports 4K/16K/64K/256K. AFAIK there's no arch with 128K page size support, but that's only based on some grepping, maybe it's hidden somewhere. cheers
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