On Thu, Feb 22, 2018 at 6:41 PM, O. Hartmann <ohartm...@walstatt.org> wrote:

> Am Wed, 21 Feb 2018 20:05:24 +0100
> "O. Hartmann" <o.hartm...@walstatt.org> schrieb:
>
> > On CURRENT ( 12.0-CURRENT FreeBSD 12.0-CURRENT #196 r329679: Tue Feb 20
> 23:06:15 CET
> > 2018 amd64) I'm honored by this nice bug when calling top:
> >
> > top: sysctl(vfs.bufspace...) expected 8, got 4
> >
> >
> > Regards,
> >
> > oh
>
> I still can not use "top", it quits with the error mentioned above. Whats
> is wrong with
> my setup?
>
>
Looks like a fallout from r329612.

Try this, untested:

 diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c
index a2a1736a24f4..7cb6aa15ddc5 100644
--- a/sys/kern/vfs_bio.c
+++ b/sys/kern/vfs_bio.c
@@ -423,7 +423,7 @@ sysctl_bufspace(SYSCTL_HANDLER_ARGS)
        lvalue = 0;
        for (i = 0; i < clean_domains; i++)
                lvalue += bdclean[i].bd_bufspace;
-       return (sysctl_handle_int(oidp, &lvalue, 0, req));
+       return (sysctl_handle_long(oidp, &lvalue, 0, req));
 }
 #endif
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