This tool is wonderful! It almost gives too much information (and that's a
good thing). But the pmap_helper.ko kernel module is a little worrisome from
a "safety" standpoint; just glancing through it, I see how it would be possible
to leave with a LK_SHARED still held on p->p_vmspace->vm_map (say, if the user
process didn't have enough room for all the pmh_map structs). Even with that
fixed, it would be good if someone (Matt Dillion?) with a lot of vm subsystem
experience looked at it for issues.
But that said, it looks very promising, indeed. Although I don't think
we'll be running it on a live server just yet, there are lots of cases
where it would be useful even so. And I'm sure that some people will be
inspired to strengthen and extend it.
-Ed
"Roman V. Palagin" <[EMAIL PROTECTED]> wrote:
: On May 11, at 1:15pm -0700, Ed Hall wrote:
: Try to look at
:
: ftp://ftp.wuppy.net.ru/pub/FreeBSD/local/pmap/pmap-20010226.tar.gz
:
: This is tool simular to Solaris' pmap. You need to compile and install
: pmap_helper, then compile pmap itself (pmap.d is very verbose development
: version of pmap, you may want to look at it if you understand some VM's
: internals :). You can run pmap w/out args, it will list all processes or
: 'pmap <pid>' to get info about specific pid.
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