On 13.02.2014 [13:06:43 -0800], Andrew Morton wrote: > On Thu, 13 Feb 2014 00:05:31 -0800 (PST) David Rientjes <rientjes@xxxxxxxxxx> wrote: > > > On Thu, 13 Feb 2014, Raghavendra K T wrote: > > > > > I was able to test (1) implementation on the system where readahead problem > > > occurred. Unfortunately it did not help. > > > > > > Reason seem to be that CONFIG_HAVE_MEMORYLESS_NODES dependency of > > > numa_mem_id(). The PPC machine I am facing problem has topology like > > > this: > > > > > > numactl -H > > > --------- > > > available: 2 nodes (0-1) > > > node 0 cpus: 0 1 2 3 4 5 6 7 12 13 14 15 16 17 18 19 20 21 22 23 24 25 > > > ... > > > node 0 size: 0 MB > > > node 0 free: 0 MB > > > node 1 cpus: 8 9 10 11 32 33 34 35 ... > > > node 1 size: 8071 MB > > > node 1 free: 2479 MB > > > node distances: > > > node 0 1 > > > 0: 10 20 > > > 1: 20 10 > > > > > > So it seems numa_mem_id() does not help for all the configs.. > > > Am I missing something ? > > > > > > > You need the patch from http://marc.info/?l=linux-mm&m=139093411119013 > > first. > > That (un-signed-off) powerpc patch appears to be moribund. What's up? Gah, thanks for catching that Andrew, not sure what went wrong. I've appended my S-o-b. I've asked Ben to take a look, but I think he's still catching up on his queue after travelling. -Nish -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>