Re: [PATCH 2/3] automation: Linux 5.10.74 test-artifact

[Juergen Gross <jgross@suse.com>]

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On 22.10.21 21:41, Stefano Stabellini wrote:
> +Juergen
> 
> On Fri, 22 Oct 2021, Andrew Cooper wrote:
>> On 22/10/2021 00:08, Stefano Stabellini wrote:
>>> +# build depends
>>> +RUN apt-get update && \
>>> +    apt-get --quiet --yes install \
>>> +        build-essential \
>>> +        libssl-dev \
>>> +        bc \
>>> +        curl \
>>> +        flex \
>>> +        bison \
>>> +        libelf-dev \
>>> +        && \
>>> +    \
>>> +    # Build the kernel
>>> +    curl -fsSLO https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-"$LINUX_VERSION".tar.xz && \
>>> +    tar xvJf linux-"$LINUX_VERSION".tar.xz && \
>>> +    cd linux-"$LINUX_VERSION" && \
>>> +    make defconfig && \
>>> +    make xen.config && \
>>> +    cp .config .config.orig && \
>>> +    cat .config.orig | grep XEN | grep =m |sed 's/=m/=y/g' >> .config && \
>>> +    make -j$(nproc) bzImage && \
>>
>> defconfig is huuuuge.  Can we use tinyconfig instead?
>>
>> Also, you want to turn off CONFIG_MODULES seeing as you only copy
>> bzImage to the test.
>>
>> This also fixes the fact that `grep XEN` also matches CONFIG_NETXEN_NIC
>> which has nothing to do with Xen.
> 
> Tinyconfig would be a good idea but it crashes on QEMU with the appended
> boot log. I did:
> 
> # make tinyconfig
> # make xen.config
> # make bzImage
> 
> Of course we could have our own tailored special kernel config for this
> kernel but I like the simplicify of "make tinyconfig" or "make
> defconfig" followed by "make xen.config".
> 
> Unless you know one kconfig option or two that we need to add to
> tinyconfig to make it work my preference is to go with defconfig for
> now.

You will need to add the dom0 and SMP related config options at least.

I'll have a look at config.xen, which is a little bit weird: it
configures the backends, but not dom0.


Juergen

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