linux-kernel - Re: [PATCH v2] arm64: defconfig: Enable zram, xfs and loading compressed FW support

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Date: Wed, 21 Feb 2024 16:46:21 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Arnd Bergmann <arnd@...db.de>, Maxime Ripard <mripard@...hat.com>
Cc: Javier Martinez Canillas <javierm@...hat.com>,
 linux-kernel@...r.kernel.org, Enric Balletbo i Serra <eballetbo@...hat.com>,
 Erico Nunes <nunes.erico@...il.com>, Brian Masney <bmasney@...hat.com>,
 Bjorn Andersson <quic_bjorande@...cinc.com>,
 Catalin Marinas <catalin.marinas@....com>,
 Geert Uytterhoeven <geert+renesas@...der.be>,
 Konrad Dybcio <konrad.dybcio@...aro.org>,
 Marek Szyprowski <m.szyprowski@...sung.com>,
 Neil Armstrong <neil.armstrong@...aro.org>, Will Deacon <will@...nel.org>,
 linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] arm64: defconfig: Enable zram, xfs and loading
 compressed FW support

On 21/02/2024 16:41, Arnd Bergmann wrote:
> On Wed, Feb 21, 2024, at 16:24, Maxime Ripard wrote:
>> On Wed, Feb 21, 2024 at 04:10:12PM +0100, Krzysztof Kozlowski wrote:
>>> On 21/02/2024 15:48, Maxime Ripard wrote:
>>>> On Wed, Feb 21, 2024 at 03:22:38PM +0100, Krzysztof Kozlowski wrote:
>>>>> On 21/02/2024 15:13, Javier Martinez Canillas wrote:
>>>>>> These options are needed by some Linux distributions (e.g: Fedora), so
>>>>>
>>>>> How ZRAM is needed? Why Fedora cannot boot without it? Debian, which I
>>>>> use on my arm64 boards, does not have any problem.
>>>>
>>>> Is it relevant in any way?
>>>
>>> Yes, because it is justification why we are doing it. Each commit is
>>> supposed to explain "why" and the explanation here is not enough.
>>
>> There's a why though: it makes Fedora boot. It might not be enough for
>> you, but that's a different story. So, if it's not enough, please state
>> exactly what you expect from that patch description so Javier can
>> provide it.
> 
> It's definitely enough for me. It makes a lot of sense to have
> a defconfig that boots common and popular distros.
> 
> I don't use ZRAM either, but I can see that being useful to
> avoid swapping to SD cards or eMMC when that is the only
> available swap device.
> 
>>>>> I kind of repeat comments from similar patch earlier:
>>>>> https://lore.kernel.org/all/fe1e74a2-e933-7cd9-f740-86d871076191@linaro.org/
>>>>>
>>>>> About XFS: I don't think it is needed to boot anything.
>>>>
>>>> Just like 9P_FS, NFS or UBIFS.
>>>
>>> NFS is often used on targets, e.g. my board farm, but also by other people.
>>>
>>> UBIFS was added recently because one device was using it - you needed
>>> it. 9P_FS looks unnecessary.
>>
>> So all we need is one person or use case to require it? Sounds like
>> we've checked that mark here.
> 
> I think we want all of the above. We can probably drop ext2 since
> we already need ext4, but that is a different question.

I'll send a patch. Ext3 is there as well.

Best regards,
Krzysztof