Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> writes: >> stuff is happening by comparing page->count and page->_mapcount, but it >> certainly wouldn't be conclusive. But, does this kind of nonsense even >> happen in practice? > > "Is it useful for me as a bad guy to make it happen ?" To create a DOS attack. - Allocate some memory you know your victim will want in the future, (shared libraries and the like). - Wait until your victim is using the memory you allocated. - Terminate your memory resource group. - Victim is pushed over memory limits by your exiting. - Victim can no longer allocate memory - Victim dies It's not quite that easy unless your victim calls mlockall(MCL_FUTURE), but the potential is clearly there. Am I missing something? Or is this fundamental to any first touch scenario? I just know I have problems with first touch because it is darn hard to reason about. Eric _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxx https://lists.osdl.org/mailman/listinfo/containers
