Re: [patch 3/9] Guest page hinting: volatile page cache.

Dave Hansen
2006-09-01T18:03:16Z

On Fri, 2006-09-01 at 19:42 +0200, Martin Schwidefsky wrote:
> The problem of page discard vs. normal page remove is that the page can
> be remove and discarded at the same time. Both sides are writers in the
> sense that they want to remove the page from page cache. RCU doesn't not
> help with that kind of race.

OK. It comes down to a race between

__remove_from_page_cache()/__delete_from_swap_cache()

and

__page_discard()

running on the same page at the same time. Right?

-- Dave