On 12/07/2010 08:11 AM, Wu Fengguang wrote:
So the root cause is, the bdi_dirty is well under nr_dirty due to accounting errors. They should be very close because there is only one heavy dirtied bdi in the system. This can be fixed by using bdi_stat_sum(), however that's costly on large NUMA machines. So do a less costly fix of lowering the bdi limit, so that the accounting errors won't lead to the absurd situation "global limit exceeded but bdi limit not exceeded". CC: Rik van Riel<riel@xxxxxxxxxx> CC: Peter Zijlstra<a.p.zijlstra@xxxxxxxxx> Signed-off-by: Wu Fengguang<fengguang.wu@xxxxxxxxx>
I like this simple approach. Acked-by: Rik van Riel <riel@xxxxxxxxxx> -- All rights reversed -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>