Sasha Levin <sasha.levin@xxxxxxxxxx> writes: > On 11/18/2014 10:42 AM, Mel Gorman wrote: >> 1. I'm assuming this is a KVM setup but can you confirm? > > Yes. > >> 2. Are you using numa=fake=N? > > Yes. numa=fake=24, which is probably way more nodes on any physical machine > than the new code was tested on? > >> 3. If you are using fake NUMA, what happens if you boot without it as >> that should make the patches a no-op? > > Nope, still seeing it without fake numa. > >> 4. Similarly, does the kernel boot properly without without patches? > > Yes, the kernel works fine without the patches both with and without fake > numa. Hmm that is interesting. I am not sure how writeback_fid can be related. We use writeback fid to enable client side caching with 9p (cache=loose). We use this fid to write back dirty pages later. Can you share the qemu command line used, 9p mount options and the test details ? -aneesh -- 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>