From: Jan Kara Subject: Increase limits for starting writeback of dirty data References: bnc#449662 Patch-mainline: ? Return limits for dirty pages writeback to the numbers from SLES10. This dramatically improves performance of workloads dirtying a lot of memory (e.g. simple databases not using direct IO) and we're not aware it would harm anything. Signed-off-by: Jan Kara --- mm/page-writeback.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -83,7 +83,7 @@ int vm_highmem_is_dirtyable; /* * The generator of dirty data starts writeback at this percentage */ -int vm_dirty_ratio = 10; +int vm_dirty_ratio = 40; /* * vm_dirty_bytes starts at 0 (disabled) so that it is a function of