> Forgive myn utter ignorance of fuse, but does it currently context > switch to user space for every 4k written through VFS? Yes, unfortunately it does, so fuse would benefit from batched writing as well, with some constraint on the number of locked pages to avoid DoS against the page cache. Miklos - 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