Avi Kivity wrote: > Enrico Weigelt wrote: >> Hi folks, >> >> I'm using dozens of VE's / jails to separate applications >> (even complete webapps w/ their own httpd) for easier maintenance >> and better security. But this tends to consume a lot of memory, >> since code sharing (.so's) cannot take effect here (each jail/VE >> has it's completely own tree). >> Now I wonder if it might be possible to let the kernel automatically >> find out equal pages and map them together. >> A little compasion showed up that at least 50% of the code could be >> shared (maybe more with some tuning, and maybe even data). So it's >> (IMHO) really worth it. >> >> Would this be possible ? What had to be done for this ? >> > > Izik (copied) is working on this for kvm. Results so far are very > encouraging, but currently merged pages are not swappable. > we have module that posted with kernel patchs in the mm list, you can actualy run it and play with it there were some bugs that we fixed with it, but i am still not sending it, beacuse i change there quite alot of things in order to get swapping possible for the pages that are shared. -- woof.
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