OK
Martin Pieuchot <[email protected]> wrote:
> schwarze@ pointed out that systat(1) refers to a non-documented
> function: uvm_swap_get(). I doubt referencing a UVM function is
> something appropriate. Diff below tries to explain in word what the
> counter is: the number of swap page that have been read from disk.
>
> It is not only incremented in the page fault handler, so I used the
> word 'moved'.
>
> Comments, oks?
>
> Index: usr.bin/systat/systat.1
> ===================================================================
> RCS file: /cvs/src/usr.bin/systat/systat.1,v
> retrieving revision 1.114
> diff -u -p -r1.114 systat.1
> --- usr.bin/systat/systat.1 16 Jan 2020 16:46:47 -0000 1.114
> +++ usr.bin/systat/systat.1 22 Apr 2020 21:16:00 -0000
> @@ -715,7 +715,7 @@ swap pages in use
> .It swpgonly
> in use swap pages not in RAM
> .It nswget
> -fault called uvm_swap_get()
> +swap pages moved from disk to RAM
> .It nanon
> total anon's
> .Pp
> Index: sys/uvm/uvmexp.h
> ===================================================================
> RCS file: /cvs/src/sys/uvm/uvmexp.h,v
> retrieving revision 1.4
> diff -u -p -r1.4 uvmexp.h
> --- sys/uvm/uvmexp.h 6 Nov 2018 07:49:38 -0000 1.4
> +++ sys/uvm/uvmexp.h 22 Apr 2020 21:15:37 -0000
> @@ -78,7 +78,7 @@ struct uvmexp {
> int swpages; /* number of PAGE_SIZE'ed swap pages */
> int swpginuse; /* number of swap pages in use */
> int swpgonly; /* number of swap pages in use, not also in RAM */
> - int nswget; /* number of times fault calls uvm_swap_get() */
> + int nswget; /* number of swap pages moved from disk to RAM */
> int nanon; /* XXX number total of anon's in system */
> int unused05; /* formerly nanonneeded */
> int unused06; /* formerly nfreeanon */
>
