2017-02-21 15:42 GMT+03:00 Kirill A. Shutemov [off-list ref]:

On Tue, Feb 21, 2017 at 02:54:20PM +0300, Dmitry Safonov wrote:

quoted

2017-02-17 19:50 GMT+03:00 Andy Lutomirski [off-list ref]:

quoted

On Fri, Feb 17, 2017 at 6:13 AM, Kirill A. Shutemov
[off-list ref] wrote:

quoted

This patch introduces two new prctl(2) handles to manage maximum virtual
address available to userspace to map.

...

quoted

Anyway, can you and Dmitry try to reconcile your patches?

So, how can I help that?
Is there the patch's version, on which I could rebase?
Here are BTW the last patches, which I will resend with trivial ifdef-fixup
after the merge window:
http://marc.info/?i=20170214183621.2537-1-dsafonov%20()%20virtuozzo%20!%20com

Could you check if this patch collides with anything you do:

http://lkml.kernel.org/r/20170220131515.GA9502@node.shutemov.name

Ok, sorry for the late reply - it was the merge window anyway and I've got
urgent work to do.

Let's see:

I'll need minor merge fixup here:

-#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
+#define TASK_UNMAPPED_BASE (PAGE_ALIGN(DEFAULT_MAP_WINDOW / 3))

while in my patches:

+#define __TASK_UNMAPPED_BASE(task_size)        (PAGE_ALIGN(task_size / 3))
+#define TASK_UNMAPPED_BASE             __TASK_UNMAPPED_BASE(TASK_SIZE)

This should be just fine with my changes:

- info.high_limit = end;
+ info.high_limit = min(end, DEFAULT_MAP_WINDOW);

This will need another minor fixup:

-#define MAX_GAP (TASK_SIZE/6*5)
+#define MAX_GAP (DEFAULT_MAP_WINDOW/6*5)

I've moved it from macro to mmap_base() as local var,
which depends on task_size parameter.

That's all, as far as I can see at this moment.
Does not seems hard to fix. So I suggest sending patches sets
in parallel, the second accepted will rebase the set.
Is it convenient for you?
If you have/will have some questions about my patches, I'll be
open to answer.

-- 
             Dmitry

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