2012-04-10 오전 9:49, Rik van Riel 쓴 글: > On 04/09/2012 08:31 PM, Minchan Kim wrote: >> 2012-04-10 오전 8:50, Alexey Ivanov 쓴 글: >> >>> Did you consider making this ratio tunable, at least manually(i.e. >>> via sysctl)? >>> I suppose we are not the only ones with almost-whole-ram-mmaped >>> workload. >> >> Personally, I think it's not good approach. >> It depends on kernel's internal implemenatation which would be changed >> in future as we chagend it at 2.6.28. > > I also believe that a tunable for this is not going to be > a very workable approach, for the simple reason that changing > the value does not make a predictable change in the effectiveness > of working set detection or protection. > >> In my opinion, kernel just should do best effort to keep active working >> set except some critical pages which are code pages. > > Johannes has some experimental code to measure refaults, and > calculate their distance in a multi-zone, multi-cgroup environment. > > That would allow us to predictably place things in the working set > as required. > Hannes, it can help many people if you post your code. ;) -- Kind regards, Minchan Kim -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>