> On Sep 5, 2017, at 2:17 PM, Linus Torvalds <[email protected]> > wrote: > >> On Mon, Sep 4, 2017 at 2:31 AM, Ingo Molnar <[email protected]> wrote: >> >> Please pull the latest ... git tree from: >> >> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git ... > > Hmm. My laptop (XPS 13) doesn't resume any more. It suspends, but > doesn't come back from resume. >
You could try booting with nopcid to rule out CR4 issues. I can also imagine SME's very clever CR3 masking causing a problem. Unfortunately, if it's a PCID problem involving wrong ordering of CR4 initialization, you might get lucky if you suspend with ASID 0 active, causing unfortunate bisection results. I will test on my XPS 13 after lunch. > I immediately assumed it was the power management pulls I just did, > but then I started bisecting, and now it's actually pointing into the > various x86 pulls I did yesterday instead. > > Now, I'm reasonably early in my bisection (so literally "somewhere > between the 'docs-next' and the 'x86-mm-for-linus' pull), and maybe > the problem isn't even entirely repeatable and my bisection has > already gone off the rails, but I thought I'd give at least an early > heads-up about this thing. > > I'll have more as it bisects deeper into the merge window, but it > might be a while. > > Linus
