Hi. On Tue, May 21, 2019 at 08:50:00AM +0200, Michal Hocko wrote: > On Tue 21-05-19 08:36:28, Oleksandr Natalenko wrote: > [...] > > Regarding restricting the hints, I'm definitely interested in having > > remote MADV_MERGEABLE/MADV_UNMERGEABLE. But, OTOH, doing it via remote > > madvise() introduces another issue with traversing remote VMAs reliably. > > IIUC, one can do this via userspace by parsing [s]maps file only, which > > is not very consistent, and once some range is parsed, and then it is > > immediately gone, a wrong hint will be sent. > > > > Isn't this a problem we should worry about? > > See http://lkml.kernel.org/r/20190520091829.GY6836@xxxxxxxxxxxxxx Oh, thanks for the pointer. Indeed, for my specific task with remote KSM I'd go with map_files instead. This doesn't solve the task completely in case of traversal through all the VMAs in one pass, but makes it easier comparing to a remote syscall. -- Best regards, Oleksandr Natalenko (post-factum) Senior Software Maintenance Engineer
