lkml.org 
[lkml]   [2006]   [Nov]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [ckrm-tech] [RFC][PATCH 8/8] RSS controller support reclamation
On 11/10/06, Arjan van de Ven <arjan@infradead.org> wrote:
> On Fri, 2006-11-10 at 01:06 +0530, Balbir Singh wrote:
> >
> > Reclaim memory as we hit the max_shares limit. The code for reclamation
> > is inspired from Dave Hansen's challenged memory controller and from the
> > shrink_all_memory() code
>
>
> Hmm.. I seem to remember that all previous RSS rlimit attempts actually
> fell flat on their face because of the reclaim-on-rss-overflow behavior;
> in the shared page / cached page (equally important!) case, it means
> process A (or container A) suddenly penalizes process B (or container B)
> by making B have pagecache misses because A was using a low RSS limit.
>
> Unmapping the page makes sense, sure, and even moving then to inactive
> lists or whatever that is called in the vm today, but reclaim... that's
> expensive...
>

I see your point, one of things we could do is that we could track
shared and cached pages separately and not be so severe on them.

I'll play around with this idea and see what I come up with.

Thanks for the feedback,
Balbir
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-11-10 02:59    [W:0.061 / U:0.276 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site