On Fri, 17 Jan 2020 at 14:05, Jan Stancek <jstancek@xxxxxxxxxx> wrote: > > > > ----- Original Message ----- > > Hi! > > > > One or more kernel tests failed: > > > > > > > > ppc64le: > > > > ??? LTP > > > > > > Hi, I see max_map_count failed on ppc64le: > > > https://artifacts.cki-project.org/pipelines/385189/logs/ppc64le_host_2_LTP_mm.run.log > > > > That's strange, we do attempt to map 65536 mappings but we do not touch > > them, so these shouldn't be faulted in, so there is no real reason why > > mmap() in the child process should stop prematurely at 65532. > > > > I guess that we cannot do much here, unless it's reproducible, because > > there is not much information there. > > max_map_count.c:205: FAIL: 64882 map entries in total, but expected 65536 entries > > I can reproduce it by running it in loop for couple hours. Though no idea > why we started seeing it only in 5.4.13 rc kernels, as there doesn't seem > to be any significant mm changes. > > I'll try some older kernels. I have noticed max_map_count fail intermittently on multiple stable branches on slow devices. max_map_count.c:202: FAIL: 63231 map entries in total, but expected 65536 entries https://qa-reports.linaro.org/lkft/linux-stable-rc-4.19-oe/tests/ltp-mm-tests/max_map_count https://qa-reports.linaro.org/lkft/linux-mainline-oe/tests/ltp-mm-tests/max_map_count?&page=2 - Naresh
