Hello Tom, On Wed, Dec 7, 2016, at 00:06, Tom Herbert wrote: > We are seeing a fair number of machines getting into softlockup in 4.6 > kernel. As near as I can tell this is happening on the spinlock in > bind hash bucket. When inet_csk_get_port exits and does spinunlock_bh > the TCP timer runs and we hit lockup in inet_put_port (presumably on > same lock). It seems like the locked isn't properly be unlocked > somewhere but I don't readily see it. > > Any ideas?
Likewise we received reports that pretty much look the same on our heavily patched kernel. Did you have a chance to investigate or reproduce the problem? I am wondering if you would be able to take a complete thread stack dump if you can reproduce this to check if one of the user space processes is looping inside finding a free port? Thanks, Hannes
