From: Herbert Poetzl <herbert@13thfloor.at>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Kirill Korotaev <dev@sw.ru>,
containers@lists.osdl.org, menage@google.com, xemul@sw.ru,
linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCH 2/7] RSS controller core
Date: Mon, 12 Mar 2007 02:00:39 +0100 [thread overview]
Message-ID: <20070312010039.GC21861@MAIL.13thfloor.at> (raw)
In-Reply-To: <20070311045111.62d3e9f9.akpm@linux-foundation.org>
On Sun, Mar 11, 2007 at 04:51:11AM -0800, Andrew Morton wrote:
> > On Sun, 11 Mar 2007 15:26:41 +0300 Kirill Korotaev <dev@sw.ru> wrote:
> > Andrew Morton wrote:
> > > On Tue, 06 Mar 2007 17:55:29 +0300
> > > Pavel Emelianov <xemul@sw.ru> wrote:
> > >
> > >
> > >>+struct rss_container {
> > >>+ struct res_counter res;
> > >>+ struct list_head page_list;
> > >>+ struct container_subsys_state css;
> > >>+};
> > >>+
> > >>+struct page_container {
> > >>+ struct page *page;
> > >>+ struct rss_container *cnt;
> > >>+ struct list_head list;
> > >>+};
> > >
> > >
> > > ah. This looks good. I'll find a hunk of time to go through
> > > this work and through Paul's patches. It'd be good to get both
> > > patchsets lined up in -mm within a couple of weeks. But..
> > >
> > > We need to decide whether we want to do per-container memory
> > > limitation via these data structures, or whether we do it via
> > > a physical scan of some software zone, possibly based on Mel's
> > > patches.
> > i.e. a separate memzone for each container?
>
> Yep. Straightforward machine partitioning. An attractive thing is that
> it 100% reuses existing page reclaim, unaltered.
>
> > imho memzone approach is inconvinient for pages sharing and shares
> > accounting. it also makes memory management more strict, forbids
> > overcommiting per-container etc.
>
> umm, who said they were requirements?
well, I guess all existing OS-Level virtualizations
(Linux-VServer, OpenVZ, and FreeVPS) have stated more
than one time that _sharing_ of resources is a central
element, and one especially important resource to share
is memory (RAM) ...
if your aim is full partitioning, we do not need to
bother with OS-Level isolation, we can simply use
Paravirtualization and be done ...
> > Maybe you have some ideas how we can decide on this?
>
> We need to work out what the requirements are before we can
> settle on an implementation.
Linux-VServer (and probably OpenVZ):
- shared mappings of 'shared' files (binaries
and libraries) to allow for reduced memory
footprint when N identical guests are running
- virtual 'physical' limit should not cause
swap out when there are still pages left on
the host system (but pages of over limit guests
can be preferred for swapping)
- accounting and limits have to be consistent
and should roughly represent the actual used
memory/swap (modulo optimizations, I can go
into detail here, if necessary)
- OOM handling on a per guest basis, i.e. some
out of memory condition in guest A must not
affect guest B
HTC,
Herbert
> Sigh. Who is running this show? Anyone?
>
> You can actually do a form of overcommittment by allowing multiple
> containers to share one or more of the zones. Whether that is
> sufficient or suitable I don't know. That depends on the requirements,
> and we haven't even discussed those, let alone agreed to them.
>
> _______________________________________________
> Containers mailing list
> Containers@lists.osdl.org
> https://lists.osdl.org/mailman/listinfo/containers
next prev parent reply other threads:[~2007-03-12 1:00 UTC|newest]
Thread overview: 129+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-06 14:42 [RFC][PATCH 0/7] Resource controllers based on process containers Pavel Emelianov
2007-03-06 14:49 ` [RFC][PATCH 1/7] Resource counters Pavel Emelianov
2007-03-07 4:03 ` Balbir Singh
2007-03-07 7:19 ` Pavel Emelianov
2007-03-09 16:37 ` Herbert Poetzl
2007-03-11 9:01 ` Pavel Emelianov
2007-03-11 19:00 ` Eric W. Biederman
2007-03-12 1:16 ` Herbert Poetzl
2007-03-13 9:09 ` Eric W. Biederman
2007-03-13 9:27 ` Pavel Emelianov
2007-03-13 9:49 ` [Devel] " Kirill Korotaev
2007-03-13 15:21 ` Herbert Poetzl
2007-03-13 15:41 ` Pavel Emelianov
2007-03-13 16:07 ` Srivatsa Vaddagiri
2007-03-14 7:12 ` Pavel Emelianov
2007-03-15 16:51 ` Eric W. Biederman
2007-03-13 16:32 ` Herbert Poetzl
2007-03-06 14:55 ` [RFC][PATCH 2/7] RSS controller core Pavel Emelianov
2007-03-06 22:00 ` Andrew Morton
2007-03-09 16:48 ` Herbert Poetzl
2007-03-11 9:08 ` Pavel Emelianov
2007-03-11 14:32 ` Herbert Poetzl
2007-03-11 15:04 ` Pavel Emelianov
2007-03-12 0:41 ` Herbert Poetzl
2007-03-12 8:31 ` Pavel Emelianov
2007-03-12 9:55 ` Balbir Singh
2007-03-12 23:43 ` Herbert Poetzl
2007-03-13 1:57 ` Balbir Singh
2007-03-13 2:24 ` Srivatsa Vaddagiri
2007-03-13 16:06 ` Herbert Poetzl
2007-03-11 12:26 ` Kirill Korotaev
2007-03-11 12:51 ` Andrew Morton
2007-03-11 15:51 ` Balbir Singh
2007-03-11 19:34 ` Eric W. Biederman
2007-03-12 9:23 ` [Devel] " Kirill Korotaev
2007-03-13 9:26 ` Eric W. Biederman
2007-03-13 15:43 ` Kirill Korotaev
2007-03-12 1:00 ` Herbert Poetzl [this message]
2007-03-12 9:02 ` Pavel Emelianov
2007-03-12 21:11 ` Herbert Poetzl
2007-03-13 7:17 ` Pavel Emelianov
2007-03-13 15:05 ` Herbert Poetzl
2007-03-13 15:32 ` Pavel Emelianov
2007-03-13 15:10 ` Kirill Korotaev
2007-03-13 15:11 ` Herbert Poetzl
2007-03-13 15:54 ` Kirill Korotaev
2007-03-12 18:42 ` Dave Hansen
2007-03-12 22:41 ` Herbert Poetzl
2007-03-12 23:02 ` Dave Hansen
2007-03-18 16:58 ` Eric W. Biederman
2007-03-13 6:04 ` Andrew Morton
2007-03-13 10:19 ` [Devel] " Kirill Korotaev
2007-03-13 11:48 ` Andrew Morton
2007-03-13 14:59 ` Herbert Poetzl
2007-03-13 17:05 ` Dave Hansen
2007-03-14 15:38 ` Mel Gorman
2007-03-14 20:42 ` Dave Hansen
2007-03-20 18:57 ` Mel Gorman
2007-03-18 22:44 ` [Devel] " Paul Menage
2007-03-19 17:41 ` Eric W. Biederman
2007-03-13 17:26 ` Dave Hansen
2007-03-13 19:09 ` Alan Cox
2007-03-13 20:28 ` Dave Hansen
2007-03-16 0:55 ` Eric W. Biederman
2007-03-16 16:31 ` Dave Hansen
2007-03-16 18:54 ` Eric W. Biederman
2007-03-16 19:46 ` Dave Hansen
2007-03-18 17:42 ` Eric W. Biederman
2007-03-19 15:48 ` Herbert Poetzl
2007-03-20 16:15 ` controlling mmap()'d vs read/write() pages Dave Hansen
2007-03-20 21:19 ` Eric W. Biederman
2007-03-23 0:51 ` Herbert Poetzl
2007-03-23 5:57 ` Nick Piggin
2007-03-23 10:12 ` Eric W. Biederman
2007-03-23 10:47 ` Nick Piggin
2007-03-23 12:21 ` Eric W. Biederman
2007-03-28 7:33 ` Nick Piggin
2007-03-23 16:41 ` Dave Hansen
2007-03-23 18:16 ` Herbert Poetzl
2007-03-28 9:18 ` Balbir Singh
2007-03-14 16:47 ` [RFC][PATCH 2/7] RSS controller core Mel Gorman
2007-03-07 5:37 ` Balbir Singh
2007-03-07 7:27 ` Pavel Emelianov
2007-03-06 14:58 ` [RFC][PATCH 3/7] Data structures changes for RSS accounting Pavel Emelianov
2007-03-11 19:13 ` Eric W. Biederman
2007-03-12 16:16 ` Kirill Korotaev
2007-03-12 16:48 ` Dave Hansen
2007-03-12 17:19 ` Pavel Emelianov
2007-03-12 17:27 ` Dave Hansen
2007-03-13 7:10 ` Pavel Emelianov
2007-03-12 17:21 ` Balbir Singh
2007-03-06 15:00 ` [RFC][PATCH 4/7] RSS accounting hooks over the code Pavel Emelianov
2007-03-11 19:14 ` Eric W. Biederman
2007-03-12 16:23 ` Kirill Korotaev
2007-03-12 16:50 ` Dave Hansen
2007-03-12 17:07 ` Kirill Korotaev
2007-03-12 17:33 ` Dave Hansen
2007-03-13 9:43 ` Eric W. Biederman
2007-03-12 23:54 ` Herbert Poetzl
2007-03-13 9:58 ` Eric W. Biederman
2007-03-13 10:25 ` Nick Piggin
2007-03-13 16:01 ` Eric W. Biederman
2007-03-14 3:51 ` Nick Piggin
2007-03-14 6:42 ` Balbir Singh
2007-03-14 6:57 ` Nick Piggin
2007-03-14 7:48 ` Balbir Singh
2007-03-14 13:25 ` Vaidyanathan Srinivasan
2007-03-14 13:49 ` Nick Piggin
2007-03-14 14:43 ` Vaidyanathan Srinivasan
2007-03-14 16:16 ` Kirill Korotaev
2007-03-15 5:01 ` Nick Piggin
2007-03-15 5:44 ` Balbir Singh
2007-03-28 20:15 ` Ethan Solomita
2007-03-14 15:37 ` Cedric Le Goater
2007-03-14 15:45 ` Pavel Emelianov
2007-03-06 15:03 ` [RFC][PATCH 5/7] Per-container OOM killer and page reclamation Pavel Emelianov
2007-03-09 21:21 ` Balbir Singh
2007-03-11 8:41 ` Pavel Emelianov
2007-03-06 15:04 ` [RFC][PATCH 6/7] Account for the number of tasks within container Pavel Emelianov
2007-03-07 2:00 ` Paul Menage
2007-03-07 7:13 ` Pavel Emelianov
2007-03-08 13:49 ` Paul Menage
2007-03-11 8:36 ` Pavel Emelianov
2007-03-06 15:07 ` [RFC][PATCH 7/7] Account for the number of files opened " Pavel Emelianov
2007-03-07 2:02 ` [RFC][PATCH 0/7] Resource controllers based on process containers Paul Menage
2007-03-07 7:30 ` Pavel Emelianov
2007-03-07 6:52 ` Balbir Singh
2007-03-07 7:32 ` Pavel Emelianov
2007-03-07 9:43 ` Kirill Korotaev
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