From 28ecb60906e86e74e9ad4ac7e0218d8631e73a94 Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Wed, 17 Mar 2010 13:31:04 +0000 Subject: Btrfs: use add_to_page_cache_lru, use __page_cache_alloc Pagecache pages should be allocated with __page_cache_alloc, so they obey pagecache memory policies. add_to_page_cache_lru is exported, so it should be used. Benefits over using a private pagevec: neater code, 128 bytes fewer stack used, percpu lru ordering is preserved, and finally don't need to flush pagevec before returning so batching may be shared with other LRU insertions. Signed-off-by: Nick Piggin : Signed-off-by: Chris Mason --- fs/btrfs/extent_io.c | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-) (limited to 'fs/btrfs/extent_io.c') diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index c99121ac5d6b..fc742e59815e 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2679,33 +2679,20 @@ int extent_readpages(struct extent_io_tree *tree, { struct bio *bio = NULL; unsigned page_idx; - struct pagevec pvec; unsigned long bio_flags = 0; - pagevec_init(&pvec, 0); for (page_idx = 0; page_idx < nr_pages; page_idx++) { struct page *page = list_entry(pages->prev, struct page, lru); prefetchw(&page->flags); list_del(&page->lru); - /* - * what we want to do here is call add_to_page_cache_lru, - * but that isn't exported, so we reproduce it here - */ - if (!add_to_page_cache(page, mapping, + if (!add_to_page_cache_lru(page, mapping, page->index, GFP_KERNEL)) { - - /* open coding of lru_cache_add, also not exported */ - page_cache_get(page); - if (!pagevec_add(&pvec, page)) - __pagevec_lru_add_file(&pvec); __extent_read_full_page(tree, page, get_extent, &bio, 0, &bio_flags); } page_cache_release(page); } - if (pagevec_count(&pvec)) - __pagevec_lru_add_file(&pvec); BUG_ON(!list_empty(pages)); if (bio) submit_one_bio(READ, bio, 0, bio_flags); -- cgit v1.2.2