On Wed, Jan 24, 2018 at 11:51 PM, Amir Goldstein [off-list ref] wrote:

There is a nicer alternative, instead of failing the file access,
an overflow event can be queued. I sent a patch for that and Jan
agreed to the concept, but thought we should let user opt-in for this
change:
https://marc.info/?l=linux-fsdevel&m=150944704716447&w=2

So IMO, if user opts-in for OVERFLOW instead of ENOMEM,
charging the listener memcg would be non controversial.
Otherwise, I cannot say that starting to charge the listener memgc
for events won't break any application.

Thanks Amir, I will send out patches soon for directed charging for
fsnotify. Also are you planning to work on the opt-in overflow for the
above case? Should I wait for your patch?

thanks,
Shakeel

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