Hi!
> So what it comes down to is
>
> sys_free_node_memory(long node_id, long pages_to_make_free, long what_to_free)
>
> where `what_to_free' consists of a bunch of bitflags (unmapped pagecache,
> mapped pagecache, anonymous memory, slab, ...).
Heh, swsusp needs shrink_all_memory() and I'd like
Andrew asked:
> So... Cannot the applicaiton remove all its pagecache with posix_fadvise()
> prior to exitting?
Hang on ...
The replies of Ray and Martin answer your immediate question.
But we (SGI) are still busy discussing the bigger picture behind the
scenes ...
--
I won'
Andrew Morton wrote:
Paul Jackson <[EMAIL PROTECTED]> wrote:
As Martin wrote, when he submitted this patch:
> The motivation for this patch is for setting up High Performance
> Computing jobs, where initial memory placement is very important to
> overall performance.
Any left over cache is wrong, f
On Tue, Feb 22, 2005 at 10:45:35AM -0800, Andrew Morton wrote:
> Paul Jackson <[EMAIL PROTECTED]> wrote:
> >
> > As Martin wrote, when he submitted this patch:
> > > The motivation for this patch is for setting up High Performance
> > > Computing jobs, where initial memory placement is very imp
Paul Jackson <[EMAIL PROTECTED]> wrote:
>
> As Martin wrote, when he submitted this patch:
> > The motivation for this patch is for setting up High Performance
> > Computing jobs, where initial memory placement is very important to
> > overall performance.
>
> Any left over cache is wrong, fo
Ingo Molnar wrote:
* Andrew Morton <[EMAIL PROTECTED]> wrote:
. enable users to
specify an 'allocation priority' of some sort, which kicks out the
pagecache on the local node - or something like that.
Yes, that would be preferable - I don't know what the difficulty is
with that. sys_set_mempolicy
Ingo wrote:
> app designers very frequently think that the VM gets its act wrong (most
> of the time for the wrong reasons),
As Martin wrote, when he submitted this patch:
> The motivation for this patch is for setting up High Performance
> Computing jobs, where initial memory placement is very im
* Andrew Morton <[EMAIL PROTECTED]> wrote:
> > . enable users to
> > specify an 'allocation priority' of some sort, which kicks out the
> > pagecache on the local node - or something like that.
>
> Yes, that would be preferable - I don't know what the difficulty is
> with that. sys_set_mempo
Ingo Molnar <[EMAIL PROTECTED]> wrote:
>
> app designers very frequently think that the VM gets its act wrong (most
> of the time for the wrong reasons), and the last thing we want to enable
> them is to hack real problems around.
Not really. Memory reclaim tries to predict the future and expec
* Andrew Morton <[EMAIL PROTECTED]> wrote:
> > However, the first step is to do this manually from user space.
>
> Yup. The thing is, lots of people want this feature for various
> reasons. Not just numerical-computing-users-on-NUMA. We should get
> it right for them too.
>
> Especially kern
Andrew wrote:
> Yes, I ... [clarifies pj's various confusions]
Yup - all sounds good - thanks.
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <[EMAIL PROTECTED]> 1.650.933.1373,
1.925.600.0401
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To unsubscr
Andrew Morton wrote:
Ray Bryant <[EMAIL PROTECTED]> wrote:
We did it this way because it was easier to get it into SLES9 that way.
But there is no particular reason that we couldn't use a system call.
It's just that we figured adding system calls is hard.
aarggh. This is why you should target ke
Ray Bryant <[EMAIL PROTECTED]> wrote:
>
> Andrew Morton wrote:
> > Martin Hicks <[EMAIL PROTECTED]> wrote:
> >
> >>This patch introduces a new sysctl for NUMA systems that tries to drop
> >> as much of the page cache as possible from a set of nodes. The
> >> motivation for this patch is for setti
Paul Jackson <[EMAIL PROTECTED]> wrote:
>
> Andrew wrote:
> > sys_free_node_memory(long node_id, long pages_to_make_free, long
> > what_to_free)
> > ...
> > - To make the syscall more general, we should be able to reclaim mapped
> > pagecache and anonymous memory as well.
>
> sys_free_node_memo
Andrew Morton wrote:
Martin Hicks <[EMAIL PROTECTED]> wrote:
This patch introduces a new sysctl for NUMA systems that tries to drop
as much of the page cache as possible from a set of nodes. The
motivation for this patch is for setting up High Performance Computing
jobs, where initial memory place
Andrew wrote:
> sys_free_node_memory(long node_id, long pages_to_make_free, long what_to_free)
> ...
> - To make the syscall more general, we should be able to reclaim mapped
> pagecache and anonymous memory as well.
sys_free_node_memory() - nice.
Does it make sense to also have it be able to f
On Mon, 21 Feb 2005 14:27:21 -0500, Martin Hicks
<[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> I've made a bunch of changes that Paul suggested. I've also responded
> to his concerns further down. Paul correctly pointed out that this
> patch uses some helper functions that are part of the cpusets patc
Martin Hicks <[EMAIL PROTECTED]> wrote:
>
> This patch introduces a new sysctl for NUMA systems that tries to drop
> as much of the page cache as possible from a set of nodes. The
> motivation for this patch is for setting up High Performance Computing
> jobs, where initial memory placement is
Hi,
I've made a bunch of changes that Paul suggested. I've also responded
to his concerns further down. Paul correctly pointed out that this
patch uses some helper functions that are part of the cpusets patch. I
should have mentioned this before.
The major changes are:
- Cleanup proc_dobitma
On Mon, Feb 14, 2005 at 07:37:04PM -0800, Paul Jackson wrote:
> Questions concerning this page cache patch that Martin submitted,
> as a merge of something originally written by Ray Bryant.
>
> The following patch is not really a patch. It is a few questions, a
> couple minor space tweaks, and
Questions concerning this page cache patch that Martin submitted,
as a merge of something originally written by Ray Bryant.
The following patch is not really a patch. It is a few questions, a
couple minor space tweaks, and a never compiled nor tested rewrite of
proc_do_toss_page_cache_nodes() to
Hi,
This patch introduces a new sysctl for NUMA systems that tries to drop
as much of the page cache as possible from a set of nodes. The
motivation for this patch is for setting up High Performance Computing
jobs, where initial memory placement is very important to overall
performance.
Curren
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