On Fri, Feb 12, 2010 at 10:19:40AM -0500, Josef Bacik wrote: > 3) sync - this is not as obvious. sync doesn't mean anything than "start > writing back dirty data to the fs", and returns before it's done. For btrfs > what that means is we run through _every_ inode that has delalloc pages > associated with them and start writeback on them. This will get most of your > data into the current transaction, which is when the snapshot happens.
sync does return synchronously on Linux, even if that is not guaranted by Posix. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
