This is recommended by Con Kolivas to improve respond time for desktop. Since the VM_MAX_READAHEAD is greatly enlarged, it may be necessary to insert some cond_resched() calls. Correct me, I'm not quite sure about the effects. Signed-off-by: Wu Fengguang --- fs/mpage.c | 4 +++- mm/readahead.c | 5 ++++- 2 files changed, 7 insertions(+), 2 deletions(-) --- linux-2.6.14-mm1.orig/mm/readahead.c +++ linux-2.6.14-mm1/mm/readahead.c @@ -582,8 +582,10 @@ static int read_pages(struct address_spa if (!add_to_page_cache(page, mapping, page->index, GFP_KERNEL)) { mapping->a_ops->readpage(filp, page); - if (!pagevec_add(&lru_pvec, page)) + if (!pagevec_add(&lru_pvec, page)) { __pagevec_lru_add(&lru_pvec); + cond_resched(); + } } else { page_cache_release(page); } @@ -701,6 +703,7 @@ __do_page_cache_readahead(struct address } read_unlock_irq(&mapping->tree_lock); + cond_resched(); page = page_cache_alloc_cold(mapping); read_lock_irq(&mapping->tree_lock); if (!page) --- linux-2.6.14-mm1.orig/fs/mpage.c +++ linux-2.6.14-mm1/fs/mpage.c @@ -343,8 +343,10 @@ mpage_readpages(struct address_space *ma bio = do_mpage_readpage(bio, page, nr_pages - page_idx, &last_block_in_bio, get_block); - if (!pagevec_add(&lru_pvec, page)) + if (!pagevec_add(&lru_pvec, page)) { __pagevec_lru_add(&lru_pvec); + cond_resched(); + } } else { page_cache_release(page); } --