On Tue, Jan 06, 2015 at 05:28:41PM +0100, Christoph Hellwig wrote: > Recall all outstanding pNFS layouts and truncates, writes and similar extent > list modifying operations. This is not sufficient to isolate extent manipulations. mmap writes can trigger allocation through ->page_mkwrite, and can also trigger extent conversion at IO completion without first needing allocation. Maybe I'm missing something - this patchset needs some comments documenting the locking used in XFS to co-ordinate layout coherency at the client side with IO that is in progress for clients with overlapping block maps, as well as against server side application IO. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
