Re: [PATCH 2/5] Swapless V2: Add migration swap entries

[Christoph Lameter]

On Thu, 13 Apr 2006, Andrew Morton wrote:

> Andrew Morton <akpm@xxxxxxxx> wrote:
> >
> > Perhaps it would be better to go to
> >  sleep on some global queue, poke that queue each time a page migration
> >  completes?
> 
> Or take mmap_sem for writing in do_migrate_pages()?  That takes the whole
> pagefault path out of the picture.

We would have to take that for each task mapping the page. Very expensive 
operation.

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