On Fri, Nov 28, 2014 at 10:54:31AM +0100, Jan Kara wrote: > On Fri 28-11-14 16:13:27, Joonsoo Kim wrote: > > On Thu, Nov 27, 2014 at 03:12:04PM +0900, Joonsoo Kim wrote: > > > On Mon, Nov 24, 2014 at 05:54:14PM -0800, Laura Abbott wrote: > > > > There have been a number of patch series posted designed to improve various > > > > aspects of CMA. A sampling: > > > > > > > > https://lkml.org/lkml/2014/10/15/623 > > > > http://marc.info/?l=linux-mm&m=141571797202006&w=2 > > > > https://lkml.org/lkml/2014/6/26/549 > > > > > > > > As far as I can tell, these are all trying to fix real problems with CMA but > > > > none of them have moved forward very much from what I can tell. The goal of > > > > this session would be to come out with an agreement on what are the biggest > > > > problems with CMA and the best ways to solve them. > > > > > > I also tried to solve problem from CMA, that is, reserved memory > > > utilization. > > > > > > https://lkml.org/lkml/2014/5/28/64 > > > > > > While playing that patchset, I found serious problem about free page > > > counting, so I stopped to develop it for a while and tried to fix it. > > > Now, it is fixed by me and I can continue my patchset. > > > > > > https://lkml.org/lkml/2014/10/31/69 > > > > > > I heard that Minchan suggests new CMA zone like movable zone, and, I > > > think that it would be the way to go. But, it would be a long-term goal > > > and I'd like to solve utilization problem with my patchset for now. > > > It is the biggest issue and it already forces someone to develop > > > out of tree solution. It's not good that out of tree solution is used > > > more and more in the product so I'd like to fix it quickly at first > > > stage. > > > > > > I think that CMA have big potential. If we fix problems of CMA > > > completely, it can be used for many places. One such case in my mind > > > is hugetlb or THP. Until now, hugetlb uses reserved approach, that is > > > very inefficient. System administrator carefully set the number of > > > reserved hugepage according to whole system workload. And application > > > can't use it freely, because it is very limited and managed resource. > > > If we use CMA for hugetlb, we can easily allocate hugepage and > > > application can use hugepages more freely. > > > > > > Anyway, I'd like to attend LSF/MM and discuss this topic. > > > > I change the subject according to LSF/MM attend request format. > > What I can do and why I'd like to attend is explained above. > > Sorry for noise. > Guys (both you and Gioh), is it such a big problem to write *new* email > (not just reply to an existing thread), use proper subject (you did this) > and write there: "I'm interested in CMA discussion, I also do X & Y". The > call for proposals specifically says "Please summarise what expertise you > will bring to the meeting". That helps us to select people when we have > more requests than space available. > > I know it sounds like stupid ranting but it really makes it easier for > program committee to select people and pick up all the topic requests and > it will take you like 5 minutes max. Hello, Jan. My bad. I will write a new e-mail to lsf-pc with proper format and contents. Again, sorry for noise. Thanks. -- 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>