Messages in this thread | | | Subject | Re: x86-tip.today (4cdf573) early instaboot | From | Mike Galbraith <> | Date | Tue, 10 Apr 2018 14:37:57 +0200 |
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On Tue, 2018-04-10 at 10:59 +0200, Ingo Molnar wrote: > * Mike Galbraith <efault@gmx.de> wrote: > > > Hi Ingo, > > > > FYI, my i4790 box reboots immediately.. or close enough to it that you > > see nothing at all before again meeting the bios splash. Master with > > the ~same config works fine. I haven't poked around yet (work). > > Hm, so there's been a few 'dangerous' pieces of work merged yesterday-ish. > > Prime suspects would be: > > triton:~/tip> gll linus..x86/pti > > 0564258fb2cf: x86/pti: Leave kernel text global for !PCID > a5df4f1f0d78: x86/pti: Never implicitly clear _PAGE_GLOBAL for kernel image > e0bb456e3250: x86/pti: Enable global pages for shared areas > efad2b415152: x86/mm: Do not forbid _PAGE_RW before init for __ro_after_init > 4ddee6efdcd0: x86/mm: Comment _PAGE_GLOBAL mystery > e71e836f463d: x86/mm: Remove extra filtering in pageattr code > 64c80759408f: x86/mm: Do not auto-massage page protections <== WOOF > 6baf4bec02db: x86/espfix: Document use of _PAGE_GLOBAL > 8a57f4849f4f: x86/mm: Introduce "default" kernel PTE mask > 606c7193d5fb: x86/mm: Undo double _PAGE_PSE clearing > d1440b23c922: x86/mm: Factor out pageattr _PAGE_GLOBAL setting > ee1400dda318: Merge branch 'linus' into x86/pti to pick up upstream changes > 071ccc966ba5: x86/entry/64: Drop idtentry's manual stack switch for user entries > 9820e1c3376c: x86/uapi: Fix asm/bootparam.h userspace compilation errors > > ... which you could test via 0564258fb2cf: if that insta-reboots too then > 9820e1c3376c^1 is expected to work and 4 bisection steps should pinpoint the > guilty commit ...
Thanks. I already had a full bisect running, so ended up doing more than 4 steps, but ended up at the above.
-Mike
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