Re: [ckrm-tech] [RFC][PATCH][0/4] Memory controller (RSS Control)

From: Balbir Singh
Date: Mon Feb 19 2007 - 05:25:45 EST

Kirill Korotaev wrote:
On 2/19/07, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:

Alas, I fear this might have quite bad worst-case behaviour. One small
container which is under constant memory pressure will churn the
system-wide LRUs like mad, and will consume rather a lot of system time.
So it's a point at which container A can deleteriously affect things which
are running in other containers, which is exactly what we're supposed to
not do.

I think it's OK for a container to consume lots of system time during
reclaim, as long as we can account that time to the container involved
(i.e. if it's done during direct reclaim rather than by something like
hmm, is it ok to scan 100Gb of RAM for 10MB RAM container?
in UBC patch set we used page beancounters to track containter pages.
This allows to make efficient scan contoler and reclamation.


Hi, Kirill,

Yes, that's a problem, but I think it's a problem that can be solved
in steps. First step, add reclaim. Second step, optimize reclaim.

Warm Regards,
Balbir Singh
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at