Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1310252

Re: v4.4-rc8 based tip tree kernel hangs on boot.

Show key headers only | View raw

[Multipart message — attachments visible in raw view] - view raw

> 
> it's the first commit in the branch in fact.
> 
> To double check, it would be nice to check that applying that commit to v4.4 
> breaks the boot too:
> 
>   git checkout v4.4
>   git cherry-pick 21cdb6b568
> 

This actually boots. i.e cherry-pick 21cdb6b568 on top of v4.4 boots
well. Next I kept on adding cherry-picks from tip/x86/efi

git log --oneline tip/x86/efi looked like this 

e2c90dd x86/efi-bgrt: Replace early_memremap() with memremap()
98f9127 Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/efi
50a0cb5 x86/efi-bgrt: Fix kernel panic when mapping BGRT data
26d7f65 x86/efi: Preface all print statements with efi* tag
3bb9eee doc: efi-stub.txt: Fix arm64 paths
7f83773 efi/esrt: Don't preformat name
ff3d0a1 Documentation/x86: Update EFI memory region description
67a9108 x86/efi: Build our own page table structures
c9f2a9a x86/efi: Hoist page table switching code into efi_call_virt()
b61a76f x86/efi: Map RAM into the identity page table for mixed mode
edc3b91 x86/mm/pat: Ensure cpa->pfn only contains page frame numbers
21cdb6b x86/mm: Page align the '_end' symbol to avoid pfn conversion bugs


So when I cherry-pick 67a9108 "x86/efi: Build our own page table
structures", the built kernel stops booting.

i.e until until I cherry-pick c9f2a9a, the kernel boots.

I still have to verify why git bisect was failing to give the right
commit.

Attached the dmesg of a good kernel boot as requested by Matt.

--
Thanks and Regards
Srikar

> ... but assuming the bisection is reliable, I'd say the evidence is pretty 
> conclusive already.
> 
> Srikar, could you please send the good and bad System.map files, so that we see 
> what the effects of the aligning were? The two interesting sha1's to test are:
> 
>   21cdb6b56843: first bad commit
>   6ffeba960734: last good commit (parent commit of 21cdb6b56843)
> 
> Thanks,
> 
> 	Ingo
> 

-- 
Thanks and Regards
Srikar Dronamraju

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Re: v4.4-rc8 based tip tree kernel hangs on boot. Matt Fleming <matt@codeblueprint.co.uk> - 2016-01-11 15:10 +0100
  Re: v4.4-rc8 based tip tree kernel hangs on boot. Ingo Molnar <mingo@kernel.org> - 2016-01-11 16:20 +0100
    Re: v4.4-rc8 based tip tree kernel hangs on boot. Srikar Dronamraju <srikar@linux.vnet.ibm.com> - 2016-01-11 17:50 +0100
  Re: v4.4-rc8 based tip tree kernel hangs on boot. Ingo Molnar <mingo@kernel.org> - 2016-01-12 11:40 +0100
    Re: v4.4-rc8 based tip tree kernel hangs on boot. Matt Fleming <matt@codeblueprint.co.uk> - 2016-01-14 13:30 +0100
    Re: v4.4-rc8 based tip tree kernel hangs on boot. Srikar Dronamraju <srikar@linux.vnet.ibm.com> - 2016-01-15 17:30 +0100
      Re: v4.4-rc8 based tip tree kernel hangs on boot. Matt Fleming <matt@codeblueprint.co.uk> - 2016-01-15 23:30 +0100
        Re: v4.4-rc8 based tip tree kernel hangs on boot. Matt Fleming <matt@codeblueprint.co.uk> - 2016-01-18 16:50 +0100
          Re: v4.4-rc8 based tip tree kernel hangs on boot. Matt Fleming <matt@codeblueprint.co.uk> - 2016-01-19 16:50 +0100
            Re: v4.4-rc8 based tip tree kernel hangs on boot. Srikar Dronamraju <srikar@linux.vnet.ibm.com> - 2016-01-19 19:20 +0100

csiph-web