Re: objrmap and vmtruncate

[Martin J. Bligh]

> The first test has 100 tasks, each of which has 100 vma's.  The 100 processes
> modify their 100 vma's in a linear walk.  Total working set is 240MB
> (slightly more than is available).
> 
> 	./rmap-test -l -i 10 -n 100 -s 600 -t 100 foo
> 
> 2.5.66-mm4:
> 	15.76s user 86.91s system 33% cpu 5:05.07 total
> 2.5.66-mm4+objrmap:
> 	23.07s user 1143.26s system 87% cpu 22:09.81 total
> 2.4.21-pre5aa2:
> 	14.91s user 75.30s system 24% cpu 6:15.84 total

Isn't the intent to use sys_remap_file_pages for these sort of workloads
anyway? In which case partial objrmap = rmap for these tests, so we're
still OK?

M.