svn commit: r285046 - head/sys/vm

[Oliver Pinter]

On 7/2/15, Konstantin Belousov <kib at freebsd.org> wrote:
> Author: kib
> Date: Thu Jul  2 15:22:13 2015
> New Revision: 285046
> URL: https://svnweb.freebsd.org/changeset/base/285046
>
> Log:
>   Account for the main process stack being one page below the highest
>   user address when ABI uses shared page.
>
>   Note that the change is no-op for correctness, since shared page does
>   not fault.  The mapping for the shared page is installed at the
>   address space creation, the page is unmanaged and its pte/pv entry
>   cannot be reclaimed.
>
>   Submitted by:	Oliver Pinter
>   Review:	https://reviews.freebsd.org/D2954
>   MFC after:	1 week

Hi Kostik!

As same MFC this?

Oliver

>
> Modified:
>   head/sys/vm/vm_map.c
>
> Modified: head/sys/vm/vm_map.c
> ==============================================================================
> --- head/sys/vm/vm_map.c	Thu Jul  2 15:17:30 2015	(r285045)
> +++ head/sys/vm/vm_map.c	Thu Jul  2 15:22:13 2015	(r285046)
> @@ -3640,7 +3640,8 @@ Retry:
>  		return (KERN_NO_SPACE);
>  	}
>
> -	is_procstack = (addr >= (vm_offset_t)vm->vm_maxsaddr) ? 1 : 0;
> +	is_procstack = (addr >= (vm_offset_t)vm->vm_maxsaddr &&
> +	    addr < (vm_offset_t)p->p_sysent->sv_usrstack) ? 1 : 0;
>
>  	/*
>  	 * If this is the main process stack, see if we're over the stack
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