> Ok, so that looks like root cause of the problem. can you try the > patch below to see if it fixes the problem (without any other > patches applied or reverted). It looks like this does fix the deadlock problem. However, it appears to come at the price of significantly higher mmap startup costs. # ./vmtest /xfs/hugefile.dat $(( 16 * 1024 * 1024 * 1024 )) /xfs/d-1/hugefile.dat: mapped 17179869184 bytes in 324387362198 ticks Sean -- 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 internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href