linux-kernel - Re: [PATCH 12/13] arm64: defconfig: sync with savedefconfig

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Date:   Thu, 14 Dec 2023 14:19:21 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>,
        Tudor Ambarus <tudor.ambarus@...aro.org>,
        Peter Griffin <peter.griffin@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        krzysztof.kozlowski+dt@...aro.org,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, andi.shyti@...nel.org,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Sam Protsenko <semen.protsenko@...aro.org>
Cc:     André Draszik <andre.draszik@...aro.org>,
        saravanak@...gle.com, William McVicker <willmcvicker@...gle.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH 12/13] arm64: defconfig: sync with savedefconfig

On 14/12/2023 13:08, Arnd Bergmann wrote:
> On Thu, Dec 14, 2023, at 11:52, Tudor Ambarus wrote:
>> Sync the defconfig with savedefconfig as config options
>> change/move over time.
>>
>> Generated with the following commands:
>> make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig
>> make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- savedefconfig
>> cp defconfig arch/arm64/configs/defconfig

These are obvious. You cannot do it differently.

>>
>> Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
>> ---
>>  arch/arm64/configs/defconfig | 144 +++++++++++++----------------------
>>  1 file changed, 55 insertions(+), 89 deletions(-)
> 
> I usually ask for defconfig changes to be merged when someone just
> adds a single line per patch, but a 144 line change is clearly too
> big, please split this up.

Anyway this should not go via my tree, because of possible conflicts.
This commit, so the savedefconfig, must be prepared on linux-next, which
should be mentioned in changelog for example. It also is not related to
this patchset.

> 
>> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
>> index b60aa1f89343..09fb467303ba 100644
>> --- a/arch/arm64/configs/defconfig
>> +++ b/arch/arm64/configs/defconfig
>> @@ -30,6 +30,8 @@ CONFIG_SCHED_AUTOGROUP=y
>>  CONFIG_BLK_DEV_INITRD=y
>>  CONFIG_KALLSYMS_ALL=y
>>  CONFIG_PROFILING=y
>> +CONFIG_KEXEC_FILE=y
>> +CONFIG_CRASH_DUMP=y
>>  CONFIG_ARCH_ACTIONS=y
>>  CONFIG_ARCH_SUNXI=y
>>  CONFIG_ARCH_ALPINE=y
>> @@ -77,9 +79,6 @@ CONFIG_ARM64_VA_BITS_48=y
>>  CONFIG_SCHED_MC=y
>>  CONFIG_SCHED_SMT=y
>>  CONFIG_NUMA=y
>> -CONFIG_KEXEC=y
>> -CONFIG_KEXEC_FILE=y
>> -CONFIG_CRASH_DUMP=y
>>  CONFIG_XEN=y
>>  CONFIG_COMPAT=y
>>  CONFIG_RANDOMIZE_BASE=y
> 
> These two hunks seem to go together, but it needs an explanation
> why you are removing CONFIG_KEXEC.
> 
>> @@ -119,7 +118,6 @@ CONFIG_KVM=y
>>  CONFIG_JUMP_LABEL=y
>>  CONFIG_MODULES=y
>>  CONFIG_MODULE_UNLOAD=y
>> -CONFIG_IOSCHED_BFQ=y
>>  # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
>>  # CONFIG_COMPAT_BRK is not set
>>  CONFIG_MEMORY_HOTPLUG=y
> 
> No, I definitely want CONFIG_IOSCHED_BFQ=y, it is essential
> for performance on certain classes of machines. It would
> be better to drop the 'imply IOSCHED_BFQ' in two Kconfig
> files.
> 
>> @@ -129,8 +127,6 @@ CONFIG_MEMORY_FAILURE=y
>>  CONFIG_TRANSPARENT_HUGEPAGE=y
>>  CONFIG_NET=y
>>  CONFIG_PACKET=y
>> -CONFIG_UNIX=y
>> -CONFIG_INET=y
>>  CONFIG_IP_MULTICAST=y
>>  CONFIG_IP_PNP=y
>>  CONFIG_IP_PNP_DHCP=y
> 
> These also seem kind of essential for almost any machine,
> I assume you are doing something wrong here.

Yep. I think the folks forget the rule not to remove user-selectable
options :/

> 


...

> 
>>  CONFIG_SLIM_QCOM_NGD_CTRL=m
>> -CONFIG_INTERCONNECT=y
>>  CONFIG_INTERCONNECT_IMX=y
>>  CONFIG_INTERCONNECT_IMX8MM=m
>>  CONFIG_INTERCONNECT_IMX8MN=m
> 
> I think the problem here are some Tegra device drivers that
> incorrectly 'select INTERCONNECT' rather than using the
> 'depends on' that every other interconnect driver has.
> Please fix those instead.

In current setup interconnect is user-selectable, so it must not be removed.

Best regards,
Krzysztof