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Bug 627808 - sys-kernel/gentoo-sources-4.12.5 and issue with root with btrfs
Summary: sys-kernel/gentoo-sources-4.12.5 and issue with root with btrfs
Status: RESOLVED UPSTREAM
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Linux bug wranglers
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-08-14 00:37 UTC by jorgicio
Modified: 2017-09-14 01:13 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---


Attachments
Grub file (grub.cfg,8.58 KB, text/plain)
2017-08-14 14:54 UTC, jorgicio
Details
the /etc/fstab (fstab,1.18 KB, text/plain)
2017-08-14 14:54 UTC, jorgicio
Details
The kernel file, used with genkernel (kernel-config-x86_64-4.12.5-gentoo,130.91 KB, text/plain)
2017-08-14 14:55 UTC, jorgicio
Details

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Description jorgicio 2017-08-14 00:37:56 UTC
Hi!

I noticed a new stable gentoo-sources was released. I compiled it with genkernel, as usual, and went fine.

However, when I try to boot it, it gets stuck when I tries to find (or mount) a btrfs partition (in my case, /). With 4.9.34 this doesn't happen.

Those are my files:

The Grub file: https://paste.pound-python.org/show/T5ZVJjOwcsdJXpW5EyDN/
My /etc/fstab: https://paste.pound-python.org/show/qInlf7pt5AOIodalVCZI/
My kernel config file: https://paste.pound-python.org/show/QmvuHAQttHu7Ns9gxj8F/

Thanks!

Reproducible: Always
Comment 1 Tomáš Mózes 2017-08-14 14:50:49 UTC
Please always attach files directly here.
Comment 2 jorgicio 2017-08-14 14:54:11 UTC
Created attachment 488896 [details]
Grub file
Comment 3 jorgicio 2017-08-14 14:54:42 UTC
Created attachment 488898 [details]
the /etc/fstab
Comment 4 jorgicio 2017-08-14 14:55:13 UTC
Created attachment 488900 [details]
The kernel file, used with genkernel
Comment 5 Mike Pagano gentoo-dev 2017-08-14 22:56:42 UTC
Try 4.12.7.
If it fails, do a git bisect to identify the offending patch.

You can also try the latest 4.13-rcX git sources kernel.

If it still fails, take upstream at bugzilla.kernel.org
Comment 6 jorgicio 2017-08-15 00:57:53 UTC
(In reply to Mike Pagano from comment #5)
> Try 4.12.7.
> If it fails, do a git bisect to identify the offending patch.
> 
> You can also try the latest 4.13-rcX git sources kernel.
> 
> If it still fails, take upstream at bugzilla.kernel.org

Just tried with 4.12.7 and the issue is the same. And I don't know how to use the git bisect :(
Meanwhile, I'm still using 4.9.34
Comment 7 Mike Pagano gentoo-dev 2017-08-15 10:27:16 UTC
(In reply to jorgicio from comment #6)
> (In reply to Mike Pagano from comment #5)
> > Try 4.12.7.
> > If it fails, do a git bisect to identify the offending patch.
> > 
> > You can also try the latest 4.13-rcX git sources kernel.
> > 
> > If it still fails, take upstream at bugzilla.kernel.org
> 
> Just tried with 4.12.7 and the issue is the same. And I don't know how to
> use the git bisect :(
> Meanwhile, I'm still using 4.9.34

It's not that hard. You can find directions here: 

http://www.reactivated.net/weblog/archives/2006/01/using-git-bisect-to-find-buggy-kernel-patches/

what about reporting this upstream to bugzilla.kernel.org?
Comment 8 Mike Pagano gentoo-dev 2017-08-15 10:29:32 UTC
Without a git bisect and no other information there is nothing I can do.
You can report upstream but they will ask for similar.  This is an bug that requires effort on both sides. Good luck.

Feel free to post the result of the git bisect or the result of the git-sources test. I'll reopen if you can provide anything useful
Comment 9 jorgicio 2017-09-14 01:13:51 UTC
Thanks for viewing the issue and sorry for not commenting before. I found the culprit: BFQ.
I removed the line "elevator=bfq" from the kernel list in the /etc/default/grub file, and the issue is fixed.