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From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Javier Martinez Canillas <javierm@redhat.com>,
	linux-kernel@vger.kernel.org
Cc: Alim Akhtar <alim.akhtar@samsung.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Gregory CLEMENT <gregory.clement@bootlin.com>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Robert Elliott <elliott@hpe.com>,
	Russell King <linux@armlinux.org.uk>,
	Stefan Hansson <newbie13xd@gmail.com>,
	Sudeep Holla <sudeep.holla@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org
Subject: Re: [PATCH] ARM: exynos_defconfig: Enable zram as loadable modules
Date: Mon, 10 Apr 2023 20:05:44 +0200	[thread overview]
Message-ID: <8132817a-db81-9a3f-7cfc-176c5df023ae@linaro.org> (raw)
In-Reply-To: <87sfd7sk04.fsf@minerva.mail-host-address-is-not-set>

On 10/04/2023 19:51, Javier Martinez Canillas wrote:
> Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> writes:
> 
>> On 10/04/2023 14:49, Javier Martinez Canillas wrote:
>>> Enable zram and dependencies as loadable modules. This allows to use the
>>> /dev/zramX virtual block devices as swap stored in system memory.
>>>
>>> Options were taken from commit 5c824e8be64d ("ARM: omap2plus_defconfig:
>>> Enable zram as loadable modules") that does the same for OMAP2+ platforms.
>>
>> Neither this commit msg nor above omap commit explain why do we want it.
>> I know what zram is, I know its purpose, but the commit should answer
>> why we want it in defconfig.
>>
>> To me it is not a matching defconfig at all:
>> 1. Not a feature related to Exynos hardware,
>> 2. Not needed for basic boot (systemd) or debug.
>>
> 
> It's needed for basic boot on distros that use swap on zram (i.e: Fedora).

ZSWAP could be for this as well, but none of them should be used to be
able to boot Fedora. If Fedora requires them, it's something broken
there. I can setup SWAP on my eMMC as well, so why would I need ZRAM?

Best regards,
Krzysztof


WARNING: multiple messages have this Message-ID (diff)
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Javier Martinez Canillas <javierm@redhat.com>,
	linux-kernel@vger.kernel.org
Cc: Alim Akhtar <alim.akhtar@samsung.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Gregory CLEMENT <gregory.clement@bootlin.com>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Robert Elliott <elliott@hpe.com>,
	Russell King <linux@armlinux.org.uk>,
	Stefan Hansson <newbie13xd@gmail.com>,
	Sudeep Holla <sudeep.holla@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org
Subject: Re: [PATCH] ARM: exynos_defconfig: Enable zram as loadable modules
Date: Mon, 10 Apr 2023 20:05:44 +0200	[thread overview]
Message-ID: <8132817a-db81-9a3f-7cfc-176c5df023ae@linaro.org> (raw)
In-Reply-To: <87sfd7sk04.fsf@minerva.mail-host-address-is-not-set>

On 10/04/2023 19:51, Javier Martinez Canillas wrote:
> Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> writes:
> 
>> On 10/04/2023 14:49, Javier Martinez Canillas wrote:
>>> Enable zram and dependencies as loadable modules. This allows to use the
>>> /dev/zramX virtual block devices as swap stored in system memory.
>>>
>>> Options were taken from commit 5c824e8be64d ("ARM: omap2plus_defconfig:
>>> Enable zram as loadable modules") that does the same for OMAP2+ platforms.
>>
>> Neither this commit msg nor above omap commit explain why do we want it.
>> I know what zram is, I know its purpose, but the commit should answer
>> why we want it in defconfig.
>>
>> To me it is not a matching defconfig at all:
>> 1. Not a feature related to Exynos hardware,
>> 2. Not needed for basic boot (systemd) or debug.
>>
> 
> It's needed for basic boot on distros that use swap on zram (i.e: Fedora).

ZSWAP could be for this as well, but none of them should be used to be
able to boot Fedora. If Fedora requires them, it's something broken
there. I can setup SWAP on my eMMC as well, so why would I need ZRAM?

Best regards,
Krzysztof


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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2023-04-10 18:06 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-10 12:49 [PATCH] ARM: exynos_defconfig: Enable zram as loadable modules Javier Martinez Canillas
2023-04-10 12:49 ` Javier Martinez Canillas
2023-04-10 16:47 ` Krzysztof Kozlowski
2023-04-10 16:47   ` Krzysztof Kozlowski
2023-04-10 17:51   ` Javier Martinez Canillas
2023-04-10 17:51     ` Javier Martinez Canillas
2023-04-10 18:05     ` Krzysztof Kozlowski [this message]
2023-04-10 18:05       ` Krzysztof Kozlowski

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