Hello Laurence, On 01/11/24(Fri) 18:48, Martin Pieuchot wrote: > On 01/11/24(Fri) 17:22, Laurence Tratt wrote: > > While doing some normal stuff on my amd64 desktop (-current as of Wed), I > > noticed the mouse starting to lag; I switched to a virtual desktop that > > happened to be running `top -S -s 1` and then the machine hung solid. > > > > The attached photo of `top` shows what was happening at that point: > > pagedaemon seems to have gone bananas (42% CPU) and also sndiod and Xorg > > are using considerable CPU percentages (though these are probably a > > consequence of the former?). > > It's hard to tell. It looks like your machine somehow ended up without > free DMA pages a situation from which the pagedaemon hardly recovers. > > If this happens again, wait a couple of minutes because the pagedaemon > might take some time to recover. If the kernel doesn't recover, could > you try to enter ddb(4) and show the content of "ps /o", "show uvm" and > "show bcstats".
During h2k24 I did a lot of work to prevent the situation you ran into and some more to recover from it. Please let us know if you still encounter something fishy. Cheers, Martin
