On Wed, Dec 02, 2020 at 08:34:57AM -0500, Qian Cai wrote: > On Thu, 2020-11-19 at 11:57 +0100, Oscar Salvador wrote: > > Hi, > > > > following up on previous fix-ups an refactors, this patchset simplifies > > the get page interface and removes the MF_COUNT_INCREASED trick we have > > for soft offline. > > Well, the madvise() EIO is back. I don't understand why we can't test it on a > NUMA system before posting this over and over again. > > # git clone https://e.coding.net/cailca/linux/mm > # cd mm; make > # ./ranbug 1 > - start: migrate_huge_offline > - use NUMA nodes 0,3. > - mmap and free 8388608 bytes hugepages on node 0 > - mmap and free 8388608 bytes hugepages on node 3 > madvise: Input/output error I tried it out myself enlarging the window race artificially but I was not able to get -EIO anymore. But as Vlastimil pointed out in the respective patch, it is better to keep the page pinned for madvise. I am planning to re-post leaving out the patches that remove the pinning. Anyway, thanks for the report. -- Oscar Salvador SUSE L3
