Date: Fri, 1 Jun 2012 10:08:14 +0400 From: Sergey Kandaurov <pluknet@freebsd.org> To: Eitan Adler <eadler@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r236380 - head/sys/vm Message-ID: <CAE-mSOK=qyKbTwnKx_y5VmDNdYJG_K7R4j6565hWy09gEu_wZQ@mail.gmail.com> In-Reply-To: <201206010442.q514gqqv084148@svn.freebsd.org> References: <201206010442.q514gqqv084148@svn.freebsd.org>
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On 1 June 2012 08:42, Eitan Adler <eadler@freebsd.org> wrote: > Author: eadler > Date: Fri Jun 1 04:42:52 2012 > New Revision: 236380 > URL: http://svn.freebsd.org/changeset/base/236380 > > Log: > Add sysctl to query amount of swap space free > > PR: kern/166780 > Submitted by: Radim Kolar <hsn@sendmail.cz> > Approved by: cperciva > MFC after: 1 week Well, we already have more powerful vm.swap_info, so I see no reason to add yet another one to do the same thing (but now with a human interface). Probably sysctl(8) should be enhanced to parse it instead. > > Modified: > head/sys/vm/swap_pager.c > > Modified: head/sys/vm/swap_pager.c > ============================================================================== > --- head/sys/vm/swap_pager.c Fri Jun 1 04:34:49 2012 (r236379) > +++ head/sys/vm/swap_pager.c Fri Jun 1 04:42:52 2012 (r236380) > @@ -2692,3 +2692,18 @@ swaponvp(struct thread *td, struct vnode > NODEV); > return (0); > } > + > +static int > +sysctl_vm_swap_free(SYSCTL_HANDLER_ARGS) { > + int swap_free, used; > + int total; > + > + swap_pager_status(&total, &used); > + > + swap_free = (total - used) * PAGE_SIZE; > + return SYSCTL_OUT(req, &swap_free, sizeof(swap_free)); > +} > + > +SYSCTL_OID(_vm, OID_AUTO, swap_free, CTLTYPE_INT|CTLFLAG_RD|CTLFLAG_MPSAFE, > + NULL, 0, sysctl_vm_swap_free, "Q", > + "Blocks of free swap storage."); -- wbr, pluknethelp
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