On 07/15/2013 10:45 AM, Nathan Zimmer wrote: > > I hadn't actually been very happy with having a PG_uninitialized2mib flag. > It implies if we want to jump to 1Gb pages we would need a second flag, > PG_uninitialized1gb, for that. I was thinking of changing it to > PG_uninitialized and setting page->private to the correct order. > Thoughts? > Seems straightforward. The bigger issue is the amount of overhead we cause by having to check upstack for the initialization status of the superpages. I'm concerned, obviously, about lingering overhead that is "forever". That being said, in the absolutely worst case we could have a counter to the number of uninitialized pages which when it hits zero we do a static switch and switch out the initialization code (would have to be undone on memory hotplug, of course.) -hpa -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>