Messages in this thread | | | Date | Wed, 18 May 2022 17:54:44 +0200 | From | Michal Koutný <> | Subject | Re: [PATCH 2/4] selftests: memcg: Expect no low events in unprotected sibling |
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Hi.
On Fri, May 13, 2022 at 11:54:16AM -0700, Roman Gushchin <roman.gushchin@linux.dev> wrote: > Hm, what are our plans here? Are we going to fix it soon-ish, or there > is still no agreement on how to proceed?
Here are some of my ideas in random order so far and comments:
0) mask memory.events:low -> not a real fix
1) don't do SWAP_CLUSTER_MAX roundup -> won't solve sudden lift of protection
2) instead of SWAP_CLUSTER_MAX over-reclaim, do same under-reclaim -> same problem as 1)
3) update children_low_usage transactionally (after reclaim round is done) - ???
4) don't recursively distribute residual protection in the same reclaim round - ???
5) iterate siblings from highest to lowest protection - not a solution
6) assign only >SWAP_CLUSTER_MAX of residuum - need more info
I'm discouraged by possible complexity of 3) or 4), while 6) is what I'd like to look more into.
HTH, Michal
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