Hi Juergen, Yesterday I wanted to test the RETPOLINE stuff in tip and tip-rt, but discovered instead that my box had turned into a complete slug, not due to incredible RETPOLINE overhead, rather because box had forgotten that it had more than one CPU. I was going to leave it for the weekend, but firing up gitk over morning java, I noticed the commits below, and sure enough, that's what broke my box. Given other people's boxen work, seems likely that the authors of the AMI BIOS in this box were a bit more creative than usual.
commit 9ede5d5e672586e016eadd5c0aedb6f12e660029 (HEAD -> x86-tip) Author: Mike Galbraith <mgalbra...@suse.de> Date: Fri Jan 12 04:17:52 2018 +0100 Revert "x86/boot: Add the ACPI RSDP address to struct setup_header::acpi_rdsp_addr" This reverts commit 2f74cbf947f45fa082dda8eac1a1f1299a372f49. commit 0d0b6a9a0d452eaf635580fce8319d49be8b45ed Author: Mike Galbraith <mgalbra...@suse.de> Date: Fri Jan 12 04:17:30 2018 +0100 Revert "x86/acpi: Take the RSDP address for boot parameters if available" This reverts commit 0c89cf36424f7c1177de8a5712514d7cc2eb369f. commit 2e9b091da44e75f16b8bad776f40de83abb637ff (origin/x86-tip) Merge: 41c34211458c 1ccb8feda747 Author: Ingo Molnar <mi...@kernel.org> Date: Thu Jan 11 06:54:18 2018 +0100 Merge branch 'perf/core'