Re: [PATCH 3/4] mm: vmscan: Evaluate the watermarks against thecorrect classzone

[Minchan Kim]

On Fri, Jun 24, 2011 at 11:44 PM, Mel Gorman <mgorman@xxxxxxx> wrote:
> When deciding if kswapd is sleeping prematurely, the classzone is
> taken into account but this is different to what balance_pgdat() and
> the allocator are doing. Specifically, the DMA zone will be checked
> based on the classzone used when waking kswapd which could be for a
> GFP_KERNEL or GFP_HIGHMEM request. The lowmem reserve limit kicks in,
> the watermark is not met and kswapd thinks its sleeping prematurely
> keeping kswapd awake in error.
>
> Reported-and-tested-by: PÃdraig Brady <P@xxxxxxxxxxxxxx>
> Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx>

-- 
Kind regards,
Minchan Kim
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