On Tue, 19 Feb 2013, Ric Mason wrote: > > There is a call of try_to_free_swap in function swap_writepage, if > swap_writepage is call from shrink_page_list path, PageSwapCache(page) == > trure, PageWriteback(page) maybe false, page_swapcount(page) == 0, then will > delete the page from swap cache and free swap slot, where I miss?
That's correct. PageWriteback is sure to be false there. page_swapcount usually won't be 0 there, but sometimes it will be, and in that case we do want to delete from swap cache and free the swap slot. Hugh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
