On Mon, Jun 19, 2023 at 02:23:47PM +0200, Greg KH wrote: > On Mon, Jun 19, 2023 at 11:11:16AM +0000, Janne Huttunen (Nokia) wrote: > > > > We recently updated an internal test server from kernel v4.19.273 > > to v4.19.286 and since then it has already multiple times triggered > > a kernel panic due to a hard lockup. The lockups look e.g. like > > this: > > Does this also happen on newer 5.4 and 6.4-rc7 releases? If I am correct, no, it will not happen there. I was surprised I believe the change that causes this issue was: b4a34aa6d "ipmi: Fix how the lower layers are told to watch for messages" which was backported into 4.9. But there was a locking change: e1891cffd4c4 "ipmi: Make the smi watcher be disabled immediately when not needed" that came in 5.1. That was required for b4a34aa6d to work correctly, and I didn't realize that. If Janne tests that patch (and the other fix for it), then kernels 5.1 and later are good as they are. Thanks, -corey > > thanks, > > greg k-h
