On Tue, May 13, 2014 at 09:31:01AM -0400, Jeff Moyer wrote: > FWIW, I think we should apply the patch. Anyone using the API properly > will not get the desired result, and it could have a negative impact on > performance. The man page is very explicit on what you should expect, > here. Anyone relying on undocumented behavior gets to keep both pieces > when it breaks. That said, I do understand your viewpoint, Andrew, > especially since it's so hard to get people to sync their data at all, > much less correctly. Agreed, we never made filesystems write out all data in the file system in fsync either just because ext3 behaved that way. And unlike that case I can't even see a good way to get msync wrong - you call it on the mapped region, so expecting it to write out data that isn't mapped at all seems rather odd. -- 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>