On (20/09/29 11:05), Sergey Senozhatsky wrote: > Hello, > > One of our unprivileged daemon process needs process PSS info. That > info is usually available in /proc/PID/smaps on per-vma basis, on > in /proc/PID/smaps_rollup as a bunch of accumulated per-vma values. > The latter one is much faster and simpler to get, but, unlike smaps, > smaps_rollup requires PTRACE_MODE_READ, which we don't want to > grant to our unprivileged daemon. > > So the question is - can we get, somehow, accumulated PSS info from > a non-privileged process? (Iterating through all process' smaps > vma-s consumes quite a bit of CPU time). This is related to another > question - why do smaps and smaps_rollup have different permission > requirements? Hold on, seems that I misread something, /proc/PID/smaps is also unavailable. So the question is, then, how do we get PSS info of a random user-space process from an unprivileged daemon? -ss
