6.2 -> 7.0 now mlock(2) fails

[Dieter]

> It is.  The pageout daemon initializes max_wired with:
> 
>         /* XXX does not really belong here */
>         if (vm_page_max_wired == 0)
>                 vm_page_max_wired = cnt.v_free_count / 3;
> 

I installed the following:

diff -r1.1 vm_pageout.c
1421c1421,1425
<               vm_page_max_wired = cnt.v_free_count / 3;
---
>         {
>           printf("vm_page_max_wired was 0.  cnt.v_free_count / 3 = %d\n", cnt.v_free_count / 3);
>           printf("setting vm_page_max_wired to cnt.v_free_count / 2 = %d\n", cnt.v_free_count / 2);
>           vm_page_max_wired = cnt.v_free_count / 2;
>         }

Which gives:

vm_page_max_wired was 0.  cnt.v_free_count / 3 = 165410
setting vm_page_max_wired to cnt.v_free_count / 2 = 248115

No mlock failures in ~2.5 weeks.
The largest value logged for vm.stats.vm.v_wire_count is 188614.

Thanks!