Re: [PATCH v6] add MAP_UNLOCKED mmap flag

From: Minchan Kim
Date: Tue Jan 19 2010 - 09:07:45 EST

On Tue, 2010-01-19 at 09:52 +0200, Gleb Natapov wrote:

> In my case (virtualization) I want to test/profile guest under heavy swapping
> of a guests memory, so I intentionally create memory shortage by creating

You mean "guest memory" that is area emulated DRAM in qemu?
It is anonymous vma.

> guest much large then host memory, but I want system to swap out only
> guest's memory.

Couldn't you use MADV_SEQUENTIAL on only guest memory area?
It doesn't make side effect about readahead since it's anon area.
And it would make do best effort to swap out guest's memory.

Kind regards,
Minchan Kim

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