On Tue, Dec 05, 2017 at 10:54:02PM -0800, Omar Sandoval wrote: > From: Omar Sandoval <osandov@xxxxxx> > > I was seeing disk flushes still happening when I mounted a Btrfs > filesystem with nobarrier for testing. This is because we use FUA to > write out the first super block, and on devices without FUA support, the > block layer translates FUA to a flush. Even on devices supporting true > FUA, using FUA when we asked for no barriers is surprising. > > Signed-off-by: Omar Sandoval <osandov@xxxxxx> Reviewed-by: David Sterba <dsterba@xxxxxxxx> The documented nobarrier behaviour matches the updated code. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
