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
