On Wed, Jul 07, 2021 at 02:14:23PM -0700, Suren Baghdasaryan wrote:

On Wed, Jul 7, 2021 at 5:38 AM Michal Hocko [off-list ref] wrote:

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On Mon 05-07-21 09:41:54, David Hildenbrand wrote:

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On 02.07.21 17:27, Christian Brauner wrote:

[...]

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That one was my favorite from the list I gave too but maybe we can
satisfy Andy too if we use one of:
- process_mfree()
- process_mrelease()

FWIW, I tend to like process_mrelease(), due to the implied "release" ("free
the memory if there are no other references") semantics.

Agreed.

Ok, sounds like process_mrelease() would be an acceptable compromise.

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Further, a new
syscall feels cleaner than some magic sysfs/procfs toggle. Just my 2 cents.

Yeah, proc based interface is both tricky to use and kinda ugly now that
pidfd can solve all at in once.

Sounds good. Will keep it as is then.

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My original preference was a more generic kill syscall to allow flags
but a dedicated syscall doesn't look really bad either.

Yeah, I have tried that direction unsuccessfully before arriving at
this one. Hopefully it represents the right compromise which can
satisfy everyone's usecase.

I think a syscall is fine and it's not we're running out of numbers
(anymore). :)

Christian