Re: [PATCH v3 6/7] tcp buffer limitation: per-cgroup limit
From: Glauber Costa
Date: Sat Sep 24 2011 - 13:28:34 EST
On 09/24/2011 01:58 PM, Andi Kleen wrote:
Glauber Costa<glommer@xxxxxxxxxxxxx> writes:
This patch uses the "tcp_max_mem" field of the kmem_cgroup to
effectively control the amount of kernel memory pinned by a cgroup.
We have to make sure that none of the memory pressure thresholds
specified in the namespace are bigger than the current cgroup.
I noticed that some other OS known by bash seem to have a rlimit per
process for this. Would that make sense too? Not sure how difficult
your infrastructure would be to extend to that.
-Andi
Well, not that hard, I believe.
and given the benchmarks I've run in this iteration, I think it wouldn't
be that much of a performance impact either. We just need to account it
to a task whenever we account it for a control group. Now that the
functions where accounting are done are abstracted away, it is even
quite few places to touch.
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