Re: [Xen-devel] [PATCH] drivers: xen-selfballoon: consider slab pages

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Nov 04, 2013 at 08:39:24PM +0800, Bob Liu wrote:
> Currently the goal_page in xen-selfballon doesn't consider much about pages 
> used
> in kernel space.
> A typical usage is slab pages, without consider slab pages the goal_page 
> result
> may be too rough and lead extra memory pressure to guest os.

Does  "lead extra memory pressure" mean OOM?

> 
> Signed-off-by: Bob Liu <bob.liu@xxxxxxxxxx>
> ---
>  drivers/xen/xen-selfballoon.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/xen/xen-selfballoon.c b/drivers/xen/xen-selfballoon.c
> index 21e18c1..4814759 100644
> --- a/drivers/xen/xen-selfballoon.c
> +++ b/drivers/xen/xen-selfballoon.c
> @@ -191,6 +191,8 @@ static void selfballoon_process(struct work_struct *work)
>               tgt_pages = cur_pages; /* default is no change */
>               goal_pages = vm_memory_committed() +
>                               totalreserve_pages +
> +                             global_page_state(NR_SLAB_RECLAIMABLE) +
> +                             global_page_state(NR_SLAB_UNRECLAIMABLE) +
>                               MB2PAGES(selfballoon_reserved_mb);
>  #ifdef CONFIG_FRONTSWAP
>               /* allow space for frontswap pages to be repatriated */
> -- 
> 1.7.10.4
> 

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