Messages in this thread | | | Date | Tue, 15 Jan 2008 11:20:27 +0000 | From | Alan Cox <> | Subject | Re: [RFC][PATCH 3/5] add /dev/mem_notify device |
| |
On Tue, 15 Jan 2008 19:59:02 +0900 KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> wrote:
> > > > the core of this patch series. > > > add /dev/mem_notify device for notification low memory to user process. > > > > As you only wake one process how would you use this API from processes > > which want to monitor and can free memory under load. Also what fairness > > guarantees are there... > > Sorry, I don't make sense what you mean fairness. > Could you tell more?
If you have two processes each waiting on mem_notify is it not possible that one of them will keep being the one woken up and the other will remain stuck ?
It also appears there is no way to wait for memory shortages (processes that can free memory easily) only for memory to start appearing.
| |