Re: [PATCH v2 5/7] mm/page_alloc: fix doc for numa_zonelist_order
From: Michal Hocko
Date: Mon Jun 17 2013 - 04:17:26 EST
On Sun 16-06-13 09:14:48, Wanpeng Li wrote:
> The default zonelist order selecter will select "node" order if any node's
> DMA zone comprises greater than 70% of its local memory instead of 60%,
> according to default_zonelist_order::low_kmem_size > total * 70/100.
Hmm, interesting. This comment has been incorrect since f0c0b2b808
(change zonelist order: zonelist order selection logic).
> Signed-off-by: Wanpeng Li <liwanp@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Michal Hocko <mhocko@xxxxxxx>
> Documentation/sysctl/vm.txt | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
> index a5717c3..15d341a 100644
> --- a/Documentation/sysctl/vm.txt
> +++ b/Documentation/sysctl/vm.txt
> @@ -531,7 +531,7 @@ Specify "[Dd]efault" to request automatic configuration. Autoconfiguration
> will select "node" order in following case.
> (1) if the DMA zone does not exist or
> (2) if the DMA zone comprises greater than 50% of the available memory or
> -(3) if any node's DMA zone comprises greater than 60% of its local memory and
> +(3) if any node's DMA zone comprises greater than 70% of its local memory and
> the amount of local memory is big enough.
> Otherwise, "zone" order will be selected. Default order is recommended unless
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