On Tue, Mar 05, 2024 at 11:41:38AM -0800, Krister Johansen wrote: > Hi Stable Team, > In 5.15, unmapping large kvm vms on arm64 can generate softlockups. My team has > been hitting this when tearing down VMs > 100Gb in size. > > Oliver fixed this with the attached patches. They've been in mainline since > 6.1. > > I tested on 5.15.150 with these patches applied. When they're present, > both the dirty_log_perf_test detailed in the second patch, and > kvm_page_table_test no longer generate softlockups when unmapping VMs > with large memory configurations. > > Would you please consider these patches for inclusion in an upcoming 5.15 > release? Backport looks fine, and I have no issues with this going to stable if it helps folks. Acked-by: Oliver Upton <oliver.upton@xxxxxxxxx> -- Thanks, Oliver
