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Tasklist

FS#30304 - [linux] 3.4.2-2 boot process halts at "saving dmesg to disk"

Attached to Project: Arch Linux
Opened by Robert de Jager (blob) - Friday, 15 June 2012, 16:51 GMT
Last edited by Tobias Powalowski (tpowa) - Wednesday, 18 July 2012, 16:36 GMT
Task Type Bug Report
Category Packages: Extra
Status Closed
Assigned To Tobias Powalowski (tpowa)
Thomas Bächler (brain0)
Architecture All
Severity Critical
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 1
Private No

Details

After upgrading to linux 3.4.2-2, 2 of of 3 my machines won't get past "saving dmesg to disk" when booting.
All of them are x86_64 machines, running with btrfs roots.

Downgrading to 3.3.6-1 or using the lts kernel makes the problem go away.
This task depends upon

Closed by  Tobias Powalowski (tpowa)
Wednesday, 18 July 2012, 16:36 GMT
Reason for closing:  Fixed
Comment by Tobias Powalowski (tpowa) - Friday, 15 June 2012, 20:19 GMT
btrfs is experimental, could be that 3.4.3 will work for you there are btrfs patches:
http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git;a=tree;f=queue-3.4;h=768f61e9920ea8115cb5da416a6266cea7eb78d9;hb=67ae4f666c8f5be265fd3850bdb93743735a7d46
Comment by Robert de Jager (blob) - Saturday, 16 June 2012, 12:49 GMT
I have rebuilt the kernel with btree-fix-tree-corruption-in-btree_get_prev.patch and btrfs-fall-back-to-non-inline-if-we-don-t-have-enough-space.patch applied.
These are the only btrfs related patches i could find.

It didn't solve the problem.
Also, i forgot to mention that there is a ton of disk activity during the "saving dmesg to disk" step, nothing else seems to happen.
The verbose option also doesn't give me anything usefull
Comment by Robert de Jager (blob) - Monday, 18 June 2012, 10:33 GMT
It turns out that it continues the boot process after 5-10 minutes.
I just tried 3.4.3-1 from testing, still no dice
Comment by Simon Danner (danners) - Monday, 18 June 2012, 20:59 GMT
I have the same problem, also with btrfs root partition. Symptoms are that every disk access is very very slow compared to previous kernels. That makes the system basically unusable.
Comment by hqet4 (hqet4) - Sunday, 15 July 2012, 15:08 GMT
Same problem here on two x86-64 machines with root btrfs partitions. The system hangs for a few minutes at boot during "saving dmesg to disk".
kernel 3.4.4-3-ARCH
Comment by hqet4 (hqet4) - Sunday, 15 July 2012, 17:03 GMT
I found the solution to my problem on the forum:
https://bbs.archlinux.org/viewtopic.php?pid=1117932#p1117932
Mounting my root partition with the space_cache option fixed the problem.
Comment by Robert de Jager (blob) - Tuesday, 17 July 2012, 07:01 GMT
The space_cache thing worked for one of my computers. The other one still gets stuck the same way. Could it have anything to do with the raid5 array on which i installed it?
Comment by Robert de Jager (blob) - Wednesday, 18 July 2012, 09:47 GMT
The second machine fell in line after upgrading to linux 3.4.5-1.
Everything works fine now. Thank you, hqet4
Comment by Simon Danner (danners) - Wednesday, 18 July 2012, 09:53 GMT
worked for me too, thanks hqet4.
Comment by Tobias Powalowski (tpowa) - Wednesday, 18 July 2012, 09:58 GMT
So can this be closed now?
Comment by Robert de Jager (blob) - Wednesday, 18 July 2012, 14:56 GMT
As far as i'm concerned it can be closed

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