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Subject: [Bug 210315] panic: destroying non-empty racct: 2113536 allocated
 for resource 4
Date: Fri, 09 Dec 2016 12:19:32 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D210315

Andriy Gapon <avg@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kib@FreeBSD.org

--- Comment #1 from Andriy Gapon <avg@FreeBSD.org> ---
I've just got another of these panics.

I wonder if it could be caused by this code:

                        size =3D vmspace_resident_count(vm);
                        if (size >=3D limit) {
                                vm_pageout_map_deactivate_pages(
                                    &vm->vm_map, limit);
                        }
#ifdef RACCT
                        if (racct_enable) {
                                rsize =3D IDX_TO_OFF(size);
                                PROC_LOCK(p);
                                racct_set(p, RACCT_RSS, rsize);
                                ravailable =3D racct_get_available(p, RACCT=
_RSS);
                                PROC_UNLOCK(p);


Specifically, we calculate rsize from size, but the value of the latter cou=
ld
be outdated if size was larger than limit and vm_pageout_map_deactivate_pag=
es()
got called.

As a side note, I wonder why greater-than-or-equal is used for comparing si=
ze
and limit.

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