pmb/config: add required option for Waydroid support

CONFIG_PSI is required for Waydroid Android containers, it's used by a userspace OOM killer within Android. See https://gitlab.com/postmarketOS/pmaports/-/merge_requests/2497 for more details.

Marking this draft for now as it might have a performance impact we don't want and thus needs testing before we decide on this permanently.

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• 52fb380d - pmb/config: add required option for Waydroid support

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By Bart Ribbers on 2021-09-09T07:46:02

https://cateee.net/lkddb/web-lkddb/PSI.html says it's only available since linux >= 4.20

By Alexey Min on 2021-09-09T07:48:48

added 1 commit

• 40744876 - pmb/config: add required option for Waydroid support

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By Bart Ribbers on 2021-09-09T07:52:54

our static-code-analysis has some draconic checks

By Alexey Min on 2021-09-09T10:21:20

added 1 commit

• e8f2f9b2 - pmb/config: add required option for Waydroid support

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By Bart Ribbers on 2021-09-09T08:20:07

added 1 commit

• 3cd7fc64 - pmb/config: add required option for Waydroid support

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By Oliver Smith on 2021-09-09T22:57:34

Thanks for the patch! Besides mentioned nitpicks, this looks good. Makes sense to add it to pmbootstrap kconfig check --anbox.

By Oliver Smith on 2021-09-09T23:04:45

Also dumping this here for reference: https://source.android.com/devices/tech/perf/lmkd

By Luca Weiss on 2021-09-11T21:16:23

added 4 commits

• 3cd7fc64...6fde1f08 - 3 commits from branch master
• b6a4b252 - pmb/config: add required option for Waydroid support (MR 2109)

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By Oliver Smith on 2021-09-12T21:05:04

@z3ntu: thanks! looks like we can drop it at some point again, when the image doesn't use the kernel-side PSI anymore.

Resolved my own comments and added PSI_DEFAULT_DISABLED too, so it's consistently enabled by default.

Anybody wants to do a second review & merge?

By Oliver Smith on 2021-09-16T12:57:10

looks like we can drop it at some point again, when the image doesn't use the kernel-side PSI anymore.

Android doesn't use the kernel thing anymore, that's the whole reason why this PSI thing is required I don't think I understand this comment?

By Bart Ribbers on 2021-09-16T12:57:10

approved this merge request

By Oliver Smith on 2021-09-12T21:06:54

marked this merge request as ready

By Oliver Smith on 2021-09-12T21:07:18

resolved all threads

By Oliver Smith on 2021-09-12T21:07:57

approved this merge request

By Alexey Min on 2021-09-13T18:09:06

added 6 commits

• b6a4b252...374d7379 - 5 commits from branch master
• 4675def8 - pmb/config: add required option for Waydroid support (MR 2109)

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By Alexey Min on 2021-09-13T18:10:21

enabled an automatic merge when the pipeline for 4675def8 succeeds

By Alexey Min on 2021-09-13T18:10:38

merged