On Thu, 3 Jul 2014 09:59:49 +0900 Minchan Kim <minchan@xxxxxxxxxx> wrote: > > > Most of field in vmstat are not changed too much but things I can notice > > > is allocstall and pgrotated. We could save allocstall(ie, direct relcaim) > > > and pgrotated very much. > > > > > > Welcome testing, review and any feedback! > > > > Well, it will worsen IRQ latencies and it's all more code for us to > > maintain. I think I'd like to see a better story about the end-user > > benefits before proceeding. > > The motivation was from per-process reclaim(which was internal feature > yet and and I will repost it soon). > It's a feature for us to manage memory from platform so that we could > avoid reclaim. > > Anyway, userspace expect they could see increased free pages in vmstat > after they have done per-process reclaim so the logic of userspace > will control their next action depending on the number of current > free page but it doesn't work with existing rotation logic, expecially > anon swap write pages. > > When I posted this patchset firstly, Rik was positive and I thought > this feature is useful for everyone as well as per-process reclaim > and don't want to make noise this patchset with perpcoess reclaim. > > https://lkml.org/lkml/2013/5/12/174 > https://lkml.org/lkml/2013/5/14/484 > > Could you tell me what should I do to proceed? Quantify the gains, quantify the losses then demonstrate that the benefits of the gains exceeds the cost of the losses plus the cost of ongoing maintenance! -- 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>