On Mon, Jun 21, 2010 at 04:34:39PM -0400, Rik van Riel wrote: > From: Andrea Arcangeli <aarcange@xxxxxxxxxx> > Subject: fix ksm swapin time optimization > > The new anon-vma code, was suboptimal and it lead to erratic invocation of > ksm_does_need_to_copy. That leads to host hangs or guest vnc lockup, or weird > behavior. It's unclear why ksm_does_need_to_copy is unstable but the point is > that when KSM is not in use, ksm_does_need_to_copy must never run or we bounce BTW, I'm debugging why ksm_does_need_to_copy breaks things... probably I found something already, maybe not. I'll let you know as soon as I have a fix. In the meantime the one above is a fix needed to avoid calling ksm_does_need_to_copy erratically even when KSM is off (which also avoids the bug to trigger). -- 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>