Re: [PATCH v6] add MAP_UNLOCKED mmap flag

From: Gleb Natapov
Date: Tue Jan 19 2010 - 09:15:14 EST

On Tue, Jan 19, 2010 at 11:07:23PM +0900, Minchan Kim wrote:
> 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.
I can try, should be better then nothing I guess. Doesn't guaranty that
emulator memory will not be swapped out though.

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