Messages in this thread | | | Date | Thu, 9 Nov 2017 14:54:44 +0100 | From | Michal Hocko <> | Subject | Re: [PATCH v2] fs: fsnotify: account fsnotify metadata to kmemcg |
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[Sorry for the late reply]
On Tue 31-10-17 11:12:38, Jan Kara wrote: > On Tue 31-10-17 00:39:58, Yang Shi wrote: [...] > > I do agree it is not fair and not neat to account to producer rather than > > misbehaving consumer, but current memcg design looks not support such use > > case. And, the other question is do we know who is the listener if it > > doesn't read the events? > > So you never know who will read from the notification file descriptor but > you can simply account that to the process that created the notification > group and that is IMO the right process to account to.
Yes, if the creator is de-facto owner which defines the lifetime of those objects then this should be a target of the charge.
> I agree that current SLAB memcg accounting does not allow to account to a > different memcg than the one of the running process. However I *think* it > should be possible to add such interface. Michal?
We do have memcg_kmem_charge_memcg but that would require some plumbing to hook it into the specific allocation path. I suspect it uses kmalloc, right? -- Michal Hocko SUSE Labs
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