Messages in this thread |  | | Date | Mon, 7 May 2001 18:22:56 -0300 (BRT) | From | Marcelo Tosatti <> | Subject | Re: page_launder() bug |
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On 7 May 2001, Linus Torvalds wrote:
> But it is important to re-calculate the deadness after getting the > lock. Before, it was just an informed guess. After the lock, it is > knowledge. And you can use informed guesses for heuristics, but you > must _not_ use them for any serious decisions.
And thats what swap_writepage() is doing:
static int swap_writepage(struct page *page) { /* One for the page cache, one for this user, one for page->buffers */ if (page_count(page) > 2 + !!page->buffers) goto in_use; if (swap_count(page) > 1) goto in_use;
... }
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