On 02/11/15 08:37, Richard Weinberger wrote: > Hi! > > Am 02.11.2015 um 09:14 schrieb Anton Ivanov: >> I was testing under similar conditions (CPU pinning using taskset -c 0 on a >> multicore). >> >> I have removed it and run some retests - I cannot reproduce the hang at this >> point with my config >> >> I am going to run a defconfig and compare the results to see if this will >> give me any insights on the root cause. > I can reproduce on both my build machine (8 core) and my laptop (4 core). > If it helps I can share the rootfs. > > On my laptop I was able to reproduce within 5 minutes. > 1. make defconfig ARCH=um > 2. make -j 4 linux ARCH=um > 3. ./linux ubda=../Downloads/Debian-Squeeze-AMD64-root_fs mem=1G > 4. login to tty0 > 5. wait a few minutes > 6. try to run top, it will hang in nanosleep
Pretty much the same. Does not hang, multiple test runs. Userspace is a relatively full install of a debian jessie. I ran deconfig and did a diff. The prime suspect differences between my config and defconfig are stack order 3 (not 1) and io sched of cfq, not deadline. I am going to retest just with these first to see if one of them is the culprit, if that does not make a difference, run it with defconfig and try to reproduce the hang. A. > > Thanks, > //richard > ------------------------------------------------------------------------------ _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
