On 06/24/2011 10:44 AM, Mel Gorman 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: Pádraig Brady<P@xxxxxxxxxxxxxx> Signed-off-by: Mel Gorman<mgorman@xxxxxxx>
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