| Message ID | 20230410124907.3293869-1-javierm@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ARM: exynos_defconfig: Enable zram as loadable modules | expand |
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. > > Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> > --- > > arch/arm/configs/exynos_defconfig | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/arm/configs/exynos_defconfig b/arch/arm/configs/exynos_defconfig > index b0f0baa3a6c4..2d5be864b4ca 100644 > --- a/arch/arm/configs/exynos_defconfig > +++ b/arch/arm/configs/exynos_defconfig > @@ -37,6 +37,8 @@ CONFIG_MODULES=y > CONFIG_MODULE_UNLOAD=y > CONFIG_PARTITION_ADVANCED=y > CONFIG_CMA=y > +CONFIG_ZSMALLOC=m > +CONFIG_PGTABLE_MAPPING=y > CONFIG_NET=y > CONFIG_PACKET=y > CONFIG_UNIX=y > @@ -84,6 +86,8 @@ CONFIG_NFC_SHDLC=y > CONFIG_NFC_S3FWRN5_I2C=y > CONFIG_DEVTMPFS=y > CONFIG_DEVTMPFS_MOUNT=y > +CONFIG_ZRAM=m > +CONFIG_ZRAM_WRITEBACK=y > CONFIG_BLK_DEV_LOOP=y > CONFIG_BLK_DEV_CRYPTOLOOP=y > CONFIG_BLK_DEV_RAM=y > > base-commit: e3adc46da349d4a4cda1c58d8186c5bce0b011fd BTW, I think the base commit makes sense if it is "well-known commit". I have latest master and next and commit is unknown. Best regards, Krzysztof
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). I just had this as a local change to boot an ODROID XU4. But have a custom defconfig for other boards anyways, so I'll just do the same for this one.
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
diff --git a/arch/arm/configs/exynos_defconfig b/arch/arm/configs/exynos_defconfig index b0f0baa3a6c4..2d5be864b4ca 100644 --- a/arch/arm/configs/exynos_defconfig +++ b/arch/arm/configs/exynos_defconfig @@ -37,6 +37,8 @@ CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y CONFIG_PARTITION_ADVANCED=y CONFIG_CMA=y +CONFIG_ZSMALLOC=m +CONFIG_PGTABLE_MAPPING=y CONFIG_NET=y CONFIG_PACKET=y CONFIG_UNIX=y @@ -84,6 +86,8 @@ CONFIG_NFC_SHDLC=y CONFIG_NFC_S3FWRN5_I2C=y CONFIG_DEVTMPFS=y CONFIG_DEVTMPFS_MOUNT=y +CONFIG_ZRAM=m +CONFIG_ZRAM_WRITEBACK=y CONFIG_BLK_DEV_LOOP=y CONFIG_BLK_DEV_CRYPTOLOOP=y CONFIG_BLK_DEV_RAM=y
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. Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> --- arch/arm/configs/exynos_defconfig | 4 ++++ 1 file changed, 4 insertions(+) base-commit: e3adc46da349d4a4cda1c58d8186c5bce0b011fd