sched.h: What does get_mm_rss() return

[bandeg]

In include/linux/sched.h, please describe the memory (including units) returned by the get_mm_rss macro?

Is it the same virtual memory (rss) that is returned by the /proc/self/stat field "rss"?

Thanks,
B

[bandeg]

I found my answers.

Chasing this macro around reveals where it is actually used to increment /proc/self/stat in linux/fs/proc/array.c.

Units are PAGES, and the number of bytes in a page is PAGE_SIZE.

Excerpt from array.c

seq_printf(m, "%d (%s) %c %d %d %d %d %d %u %lu \
%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n",
               pid_nr_ns(pid, ns),
               tcomm,
               state,
               ppid,
               pgid,
               sid,
               tty_nr,
               tty_pgrp,
               task->flags,
               min_flt,
               cmin_flt,
               maj_flt,
               cmaj_flt,
               cputime_to_clock_t(utime),
               cputime_to_clock_t(stime),
               cputime_to_clock_t(cutime),
               cputime_to_clock_t(cstime),
               priority,
               nice,
               num_threads,
               start_time,
               vsize,
               mm ? get_mm_rss(mm) : 0,
               rsslim,