On Mon 06-03-17 19:00:00, MegaBrutal wrote: > Hi Michal, > > I'm over a very long kernel bisection, and if I made no mistake in > testing commits, this patch fixes a kernel bug which affects my HP > Compaq dc5800 machine with 32 bit Ubuntu OS. > > The bug manifests itself with "NMI watchdog: BUG: soft lockup - CPU#0 > stuck for 23s! [kswapd0:38]" messages in 4.8 kernels, and "page > allocation stalls for 47608ms, order:1, > mode:0x17000c0(GFP_KERNEL_ACCOUNT|__GFP_NOTRACK)" in 4.10 kernels up > to this commit. This is really hard to say without seeing the traces. > Michal, can you confirm that this patch may fix issues like the ones I > encountered? If so, I'll try to get the Ubuntu kernel staff to > backport this commit to Yakkety's 4.8 kernel. On the other hand, I > can't seem to be able to backport this commit to 4.8 with "git > cherry-pick", so maybe I need to wait for your tweaks you mentioned. The backport from 4.9 to 4.8 shouldn't be very complicated I believe. > Anyway, thank you very much for the fix! Good to hear the patch helped you though. -- Michal Hocko SUSE Labs