ddress change: my current email address is
[EMAIL PROTECTED]
Andrew is not so much interested in these changes as the lockmeter patch is
not in -mm.
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example, it is typically important to minimize the time to do
the page allocation; if it turns out to be on a remote node it really doesn't
matter that much. So it seems to me that we need some way for the
application to tell the system which approach it prefers based on
o fix it in the VMM rather than depending on a
memory hog based work-around of some kind. Perhaps we haven't gotten the
right set of patches together to do this, but my take is that is where the
fix belongs.
And, just for the record ( :-) ), this is not just an Altix problem.
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,mmap et.al.
Yes, I agree. Let's make that so.
-Andi
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the application has departed.
But the previous statement has a false hypothesis, namely, that we could
change all applications to do this.
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Ray
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Ray Bryant
512-453-9679 (work) 512-507-7807 (cell)
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7;s make it so.
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Ray
-----------
Ray Bryant
512-453-9679 (work) 512-507-7807 (cell)
[EMAIL PROTECTED] [EMAIL PROTECTED]
The box said: "Requires Windows 98 or better",
so I installed Linux.
rnel" in
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28 CPUS in this system]. Let's suppose that jobs
arrive as follows:
. . .
Sorry about that.
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Ray
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Ray Bryant
512-453-9679 (work) 512-507-7807 (cell)
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The box
ointed out this kind of example to me, and this kind
of example did arise in IRIX, so we believe that it will arise on
Altix and we don't know of a good way around these problems other
than the system call form that includes the va_start and va_end.
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Ray
--------
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 y
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512-453-9679 (work) 512-507-7807 (cell)
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gards,
Ray
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Ray Bryant
512-453-9679 (work) 512-507-7807 (cell)
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The box said: "Requires Windows 98 or better",
so I installed Linux.
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at is, how important is it to be
able to migrate a process without suspending it?)
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Ray
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The box said: "Require
the old_nodes array [and it matches any old node], then in that case we
would make node_map[i]=new_node for all values of i.
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ser
pid can migrate pages of any pid started by the user.
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Ray
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Ray Bryant
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The box said: "Requires Windows 98 or better",
so I installe
mbind() too.
-Andi
That makes sense. I will agree to make that part work, too. as part
of this. We will probably do the external case first, because we have
need for that.
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Ray
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Ray Bryant
512-453-9679 (work) 512
ve the underlying system call in its full form
for only those systems that need it.
-Andi
But we are least at the level of agreeing that the new system
call looks something like the following:
migrate_pages(pid, count, old_list, new_list);
right?
That's progress. :-)
--
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rried about avoiding.
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-------
Ray Bryant
512-453-9679 (work) 512-507-7807 (cell)
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The box said: "Requires Windows 98 or better",
so I installed Linux.
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Andi, et al:
I see that several messages have been sent in the interim.
I apologize for being "out of sync", but today is my last
day to go skiing and it is gorgeous outside. I'll try
to catch up and digest everthing later.
--
-------
Ray
ents and I think it would satisfy
the concern that the page_migration() call was built just to
satisfy SGI requirements.
Comments, flames, suggestions, etc, as usual are all welcome.
--
-----------
Ray Bryant
512-453-9679 (work) 512-507-7807 (cell)
[EMAIL
migrate".)
The fact that NFS doesn't support this means that we will have to
have some other way to handle files from NFS though. It is possible
we can live with the notion that files mapped in from NFS are always
migratable. (I'll need to look into that some more).
On Tue, Feb 15, 2
t file to be re-read. This would be
a short term solution until xattrs are accepted and/or until Steve
Longerbeam's patch is accepted. Would that be an acceptable short
term kludge?
A hackish way to do this that already
works would be to do a mlock on one page of the file to keep
the inode pinn
issue. Let me look into this some more.
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-------
Ray Bryant
512-453-9679 (work) 512-507-7807 (cell)
[EMAIL PROTECTED] [EMAIL PROTECTED]
The box said: "Requires Windows 98 or better",
so I installed Linux.
Andi Kleen wrote:
[Sorry, didn't answer to everything in your mail the first time.
See previous mail for beginning]
On Mon, Feb 14, 2005 at 06:29:45PM -0600, Ray Bryant wrote:
migrating, and figure out from that what portions of which pid's
address spaces need to migrated so that we s
e an obscure case in your view but we've got to handle all of
those cases to make a robust facility that can be used in a production
environment.
--
---
Ray Bryant
512-453-9679 (work) 512-507-7807 (cell)
[EMAIL PROTECTED] [EMAIL PROTECTED]
The box said: "Requires Windows 98 o
Robin Holt wrote:
On Mon, Feb 14, 2005 at 06:29:45PM -0600, Ray Bryant wrote:
which is what you are asking for, I think. The library's job
(in addition to suspending all of the processes in the list for
the duration of the migration operation, plus do some other things
that are specific t
d when the
migration occurs doesn't matter, AFAIK, if we accept the notion that
a migrated task is in suspended state until after everything associated
with it (including the new cpuset definition) is done.
--
-------
Ray Bryant
512-453-9679 (work) 512
Andi Kleen wrote:
Ray Bryant <[EMAIL PROTECTED]> writes:
set of pages associated with a particular process need to be moved.
The kernel interface that we are proposing is the following:
page_migrate(pid, va_start, va_end, count, old_nodes, new_nodes);
[Only commenting on the interface, h
ociated NUMA policy). [Thus the disclaimer in
the overview note that we have figured all the interaction with
memory policy stuff yet.]
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-------
Ray Bryant
512-453-9679 (work) 512-507-7807 (cell)
[EMAIL PROTECTED] [EMAIL PROTECTED]
The
s);
+
+out_nodec:
+ if (tmp_old_nodes)
+ kfree(tmp_old_nodes);
+ if (tmp_new_nodes)
+ kfree(tmp_new_nodes);
+ if (node_map)
+ kfree(node_map);
+
+ return ret;
+
+}
+
EXPORT_SYMBOL(generic_migrate_page);
EXPORT_SYMBOL(migrate_page_common);
EXPORT_
tatic inline int generic_migrate_page(struct page *page, struct page *newpage,
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Ray
-------
Ray Bryant [EMAIL PROTECTED]
The box said: "Requires Windows 98 or better",
/* the page is already unused */
putback_page_to_lru(page_zone(page), page);
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Ray
-----------
Ray Bryant [EMAIL PROTECTED]
The box said: "Requires Windows 98 or be
Fix up a switch statement so gcc doesn't complain about it.
Signed-off-by: Ray Bryant <[EMAIL PROTECTED]>
Index: linux/mm/mmigrate.c
===
--- linux.orig/mm/mmigrate.c2005-01-30 11:13:58.0 -0800
+++ linux/mm
MAP_IMMOVABLE.
Signed-off-by: Ray Bryant <[EMAIL PROTECTED]>
Index: linux-2.6.10-mm1-page-migration/kernel/fork.c
===
--- linux-2.6.10-mm1-page-migration.orig/kernel/fork.c 2005-01-10
08:46:51.0 -0800
+++ linux-2.6.
y significant;
the others are mostly cleanup of warnings and the like.
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Ray
---
Ray Bryant [EMAIL PROTECTED]
The box said: "Requires Windows 98 or better",
so I installed Linux.
-
Fix a trivial error in include/linux/mmigrate.h
Signed-off-by: Ray Bryant <[EMAIL PROTECTED]>
Index: linux-2.6.11-rc2-mm2/include/linux/mmigrate.h
===
--- linux-2.6.11-rc2-mm2.orig/include/linux/mmigrate.h 2005-02-11
CONFIG_MEMORY_HOTPLUG
code from the page migration patch.
Signed-off-by: Ray Bryant <[EMAIL PROTECTED]>
Index: linux-2.6.11-rc2-mm2/mm/vmalloc.c
===
--- linux-2.6.11-rc2-mm2.orig/mm/vmalloc.c 2005-02-11 10:08:10.0
ds created ? The problem occurred on linux 2.2, IBM Java 1.1.8.
>
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Ray Bryant
IBM Linux Technology Center
[EMAIL PROTECTED]
512-838-8538
http://oss.software.ibm.com/developerworks/opensource/linux
We are Linux. Resistance is an indication that you missed the point.
"
#x27; drepper at redhat.com `
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Ray Bryant
IBM Linux Techn
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