> Subject: writeback: explicit low bound for vm.dirty_ratio > From: Wu Fengguang <fengguang.wu@xxxxxxxxx> > Date: Thu Jul 15 10:28:57 CST 2010 > > Force a user visible low bound of 5% for the vm.dirty_ratio interface. > > This is an interface change. When doing > > echo N > /proc/sys/vm/dirty_ratio > > where N < 5, the old behavior is pretend to accept the value, while > the new behavior is to reject it explicitly with -EINVAL. This will > possibly break user space if they checks the return value. Umm.. I dislike this change. Is there any good reason to refuse explicit admin's will? Why 1-4% is so bad? Internal clipping can be changed later but explicit error behavior is hard to change later. personally I prefer to - accept all value, or - clipping value in dirty_ratio_handler Both don't have explicit ABI change. Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>