On Fri, Oct 08, 2021 at 01:15:27PM +0200, Peter Zijlstra wrote: > Hi, > > This fixes up wchan which is various degrees of broken across the > architectures. > > Patch 4 fixes wchan for x86, which has been returning 0 for the past many > releases. > > Patch 5 fixes the fundamental race against scheduling. > > Patch 6 deletes a lot and makes STACKTRACE unconditional > > patch 7 fixes up a few STACKTRACE arch oddities > > 0day says all builds are good, so it must be perfect :-) I'm planning on > queueing up at least the first 5 patches, but I'm hoping the last two patches > can be too. > > Also available here: > > git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/wchan These patches introduce a regression on ARM. Whereas before, I have /proc/*/wchan populated with non-zero values, with these patches they _all_ contain "0": root@clearfog21:~# cat /proc/*/wchan 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000root@clearfog21:~# I'll try to investigate what is going on later today. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
