On (05/18/15 22:55), Minchan Kim wrote: > > > Why do you need all in one file? ... to provide consistent statistics? > > > > > > > yes, that's the main reason. > > In my side, other main reason was to reduce the number of system call > to see statistics. It is not only syscall overhead itself but also > causes slightly high-order allocation for kernel internal data structure > via slab allocation which is bad on low memory situation where is > frequent in zram-swap. Slab allocation could be fallback with 0-order > pages but it could cause excessive page reclaim seriously since compaction > didn't work. > Yes, it's a one of problem of current VM but there is no reason to hesitate > if we can avoid such problems and support consistent statistic as well. > true. syscalls and corresponding error handling for each one of them were on a list: https://www.marc.info/?l=linux-kernel&m=142586445420298&w=2 Karel has a remarkably good codebase, so error handling would not be an issue :-) that's why consistent stats moved forward. in general, increasing consistency and reducing the syscall pressure are good enough to move on. -ss -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
