linux-kernel - Re: [PATCH] fs: btrfs: Disable BTRFS on platforms having 256K pages

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Message-ID: <d8cd9082-4514-9c6c-85c7-418356f1f66d@marcan.st>
Date:   Fri, 7 Jan 2022 11:45:38 +0900
From:   Hector Martin <marcan@...can.st>
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
Subject: Re: [PATCH] fs: btrfs: Disable BTRFS on platforms having 256K pages

On 2022/01/07 9:13, Qu Wenruo wrote:
> 
> 
> 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.
> 
> Thanks,
> Qu

I'm happy to test things on 16K in the future if you need me to :-)

-- 
Hector Martin (marcan@...can.st)
Public Key: https://mrcn.st/pub