Hi, I couldn't find where this patch (49bbd815fd8) was discussed, so I'll make my own thread. Adding a few lists to cc because it might be of interest to driver and filesystem writers. The old ->page_mkwrite calling convention was causing problems exactly because of this race, and we solved it by allowing page_mkwrite to return with the page locked, and the lock will be held until the pte is marked dirty. See commit b827e496c893de0c0f142abfaeb8730a2fd6b37f. I hope that should provide a more elegant solution to your problem. I would really like you to take a look at that, because we already have filesystem code (NFS) relying on it, and more code we have relying on this synchronization, the more chance we would find a subtle problem with it (also it should be just nicer). Thanks, Nick -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>