-
Wu Fengguang authored
Reduce readahead overheads by returning early in do_sync_mmap_readahead(). tmpfs has ra_pages=0 and it can page fault really fast (not constraint by IO if not swapping). Signed-off-by:
Wu Fengguang <fengguang.wu@intel.com> Tested-by:
Tim Chen <tim.c.chen@intel.com> Reported-by:
Andi Kleen <ak@linux.intel.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
275b12bf