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42b6b44fa9
...and add straw man implementations of kernel_config.base and kernel_config.x86 as examples. First, splitting the build: to avoid duplication, we split the build into three parts: a "source" stage, a "config" stage, and a "build" stage. The "source" stage allows us to use a cached image, so we don't have to re-download the kernel source every time. The "config" step applies our patches and generates (and checks) the kernel config. I've left this as a separate step for now so that we can build just an image with a config in it, without having to ^C the build. However there's no real reason it needs to be a separate step, assuming that this kernel config design is acceptable. The third step is the actual kernel build. Then there is kernel config management: the bulk of it occurs in makeconfig.sh, with the idea being that we can specify base, arch, and version specific config options as necessary. The config files themselves are lists of options (both positive and negative). We include the negative options, because we want to explicitly turn off things that are on in the default config (e.g. CONFIG_USELIB), and it seems cleaner to do things this way then to have some sort of negative options list. The options files are sorted with the default behavior of the "sort" command, which ignores comment lines, meaning that negative options and positive options are inline with each other. I don't have a strong opinion on whether or not to group all negative options, or whether this default behavior makes sense, so I just left it. Finally, obviously the .base and .x86 files are incomplete. I mostly selected a few options with interesting dependencies or special issues (CONFIG_PANIC_ON_OOPS) with how we manage things, so as to demo how everything would work. It's not really clear to me that there's a good way to generate e.g. kernel_config.base, without a lot of painstaking work (which I'm happy to do if we agree this is a good approach). Signed-off-by: Tycho Andersen <tycho@docker.com>
25 lines
528 B
Plaintext
25 lines
528 B
Plaintext
CONFIG_BLK_CGROUP=y
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CONFIG_BPF_SYSCALL=y
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CONFIG_CC_OPTIMIZE_FOR_SIZE=y
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CONFIG_CGROUP_DEVICE=y
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CONFIG_CGROUP_HUGETLB=y
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CONFIG_CGROUP_PERF=y
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CONFIG_CGROUP_PIDS=y
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CONFIG_CGROUPS=y
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CONFIG_CGROUP_WRITEBACK=y
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CONFIG_CHECKPOINT_RESTORE=y
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CONFIG_EXPERT=y
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CONFIG_HUGETLBFS=y
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CONFIG_HUGETLB_PAGE=y
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CONFIG_IKCONFIG_PROC=y
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CONFIG_IKCONFIG=y
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CONFIG_LOCALVERSION="-linuxkit"
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CONFIG_MEMCG_SWAP_ENABLED=y
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CONFIG_MEMCG_SWAP=y
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CONFIG_MEMCG=y
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CONFIG_MODULES=y
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CONFIG_NAMESPACES=y
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CONFIG_PANIC_ON_OOPS=y
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# CONFIG_USELIB is not set
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CONFIG_USER_NS=y
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