On Thu, Aug 07, 2014 at 06:43:14PM +0800, Peng Tao wrote: > So this kills EMC server support. Given the state the code claiming support for any server is a large exaggeration.. > Can you please share what kind of > badly deadlock you saw with large block size support? The read-modify write code (which I'll remove later) can lock arbitary numbers of additional pages from the writeback back code without doing a trylock, which is required for doing this in page writeback. Note that it's not a deadlock, but I can also trivіally corrupt data in those pages as it doesn't lock against them, you just need a race window where it's modified after writeback has been started for a large extents, which isn't too hard to hit with tools like fsstress. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
