linux-kernel - Re: [PATCH 1/2] mm: Export vm_committed

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Date:	Sun, 7 Oct 2012 17:43:58 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>
Cc:	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
	olaf@...fle.de, apw@...onical.com, akpm@...ux-foundation.org,
	andi@...stfloor.org
Subject: Re: [PATCH 1/2] mm: Export vm_committed_as

On Sun, Oct 07, 2012 at 04:59:45PM -0700, K. Y. Srinivasan wrote:
> The policy engine on the host expects the guest to report the
> committed_as. Since this variable is not exported,
> export this symbol.

Why are these symbols not needed by either Xen or KVM or vmware, which
I think all support the same thing, right?

> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -87,6 +87,7 @@ int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT;
>   * other variables. It can be updated by several CPUs frequently.
>   */
>  struct percpu_counter vm_committed_as ____cacheline_aligned_in_smp;
> +EXPORT_SYMBOL(vm_committed_as);
>  
>  /*
>   * Check that a process has enough memory to allocate a new virtual
> diff --git a/mm/nommu.c b/mm/nommu.c
> index 45131b4..3914b7e 100644
> --- a/mm/nommu.c
> +++ b/mm/nommu.c
> @@ -68,6 +68,7 @@ atomic_long_t mmap_pages_allocated;
>  
>  EXPORT_SYMBOL(mem_map);
>  EXPORT_SYMBOL(num_physpages);
> +EXPORT_SYMBOL(vm_committed_as);

EXPORT_SYMBOL_GPL() for these new ones?

greg k-h
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