diff options
| -rw-r--r-- | fs/btrfs/extent_io.c | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 97efc2f22597..3e7c9ed6505b 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3566,19 +3566,38 @@ int extent_readpages(struct extent_io_tree *tree, struct bio *bio = NULL; unsigned page_idx; unsigned long bio_flags = 0; + struct page *pagepool[16]; + struct page *page; + int i = 0; + int nr = 0; for (page_idx = 0; page_idx < nr_pages; page_idx++) { - struct page *page = list_entry(pages->prev, struct page, lru); + page = list_entry(pages->prev, struct page, lru); prefetchw(&page->flags); list_del(&page->lru); - if (!add_to_page_cache_lru(page, mapping, + if (add_to_page_cache_lru(page, mapping, page->index, GFP_NOFS)) { - __extent_read_full_page(tree, page, get_extent, - &bio, 0, &bio_flags); + page_cache_release(page); + continue; } - page_cache_release(page); + + pagepool[nr++] = page; + if (nr < ARRAY_SIZE(pagepool)) + continue; + for (i = 0; i < nr; i++) { + __extent_read_full_page(tree, pagepool[i], get_extent, + &bio, 0, &bio_flags); + page_cache_release(pagepool[i]); + } + nr = 0; } + for (i = 0; i < nr; i++) { + __extent_read_full_page(tree, pagepool[i], get_extent, + &bio, 0, &bio_flags); + page_cache_release(pagepool[i]); + } + BUG_ON(!list_empty(pages)); if (bio) return submit_one_bio(READ, bio, 0, bio_flags); |