A long time ago there was an attempt to merge a patch that reduced the cost of unlock_page by avoiding the page_waitqueue lookup if there were no waiters. It was rejected on the grounds of complexity but it was pointed out that the read paths call lock_page unnecessarily. This series reduces the number of calls to lock_page when multiple processes read data in at the same time. mm/filemap.c | 90 ++++++++++++++++++++++++++++++++++++++++-------------------- 1 file changed, 60 insertions(+), 30 deletions(-) -- 2.6.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>