Latest kernel in F20 leads to read only file system

[Erinn Looney-Triggs]

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On 02/20/2014 09:30 AM, Eric Sandeen wrote:
> On 2/20/14, 9:32 AM, Erinn Looney-Triggs wrote:
>> Well you get a cell picture this time. Couldn't even log in. I am
>> using btrfs at the moment as you can see from the exception.
> 
> "kernel BUG at mm/filemap.c:610"
> 
> which is
> 
> void unlock_page(struct page *page) { VM_BUG_ON(!PageLocked(page));
> <===
> 
> unlocking a page which is not locked in a btrfs endio thread ...
> very little to go on here.
> 
> the subsequent btrfs errors may or may not be related; btrfs error
> handling is not superb.
> 
> Probably best to file a bug in RH bugzilla, and add any additional
> info there as you are able to obtain it.
> 
> -Eric
> 
> 
> 
>> Erinn 
>> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------!
 -!
>
>> 
- ---
>> From: Eric Sandeen <mailto:sandeen at redhat.com> Sent: ‎2/‎19/‎2014
>> 20:45 To: Erinn Looney-Triggs
>> <mailto:erinn.looneytriggs at gmail.com>;
>> kernel at lists.fedoraproject.org
>> <mailto:kernel at lists.fedoraproject.org> Subject: Re: Latest
>> kernel in F20 leads to read only file system
>> 
>> On 2/19/14, 11:19 PM, Erinn Looney-Triggs wrote:
>>> On 2/19/2014 6:36 PM, Eric Sandeen wrote:
>>>> On 2/19/14, 6:02 PM, Erinn Looney-Triggs wrote:
>>>>> kernel-3.13.3-201.fc20.x86_64 seems to lead to file system
>>>>> failures for me. Kernels < 3.13 however do not have this
>>>>> issue.
>>>>> 
>>>>> At first I thought it was just file system corruption.
>>>>> However, after approximately 5 reinstalls today the issue
>>>>> continues to surface every time I move to the 3.13 kernel,
>>>>> whether using BTRFS or ext4.
>>>>> 
>>>>> Behavior for both file systems differs slightly, ext4
>>>>> complains about a fair number of errors (sorry I don't have
>>>>> the specifics)
>>>> We'll need those specifics.  ;)  dmesg and/or kernel logs in
>>>> a bugzilla would probably be best.
>>>> 
>>>> -Eric
>>>> 
>>> 
>>> Ok given that I don't have a writeable file system, is there
>>> any reasonably smart way to go about getting these error
>>> messages to you other than writing them down and typing them
>>> up?
>>> 
>>> -Erinn
>> 
>> You wouldn't be the first to submit a cellphone photo :)
>> 
>> -Eric
> 

Well as a start I can pretty easily switch back to ext4, btrfs was
just and attempt to see if using a different file system would
alleviate the issue. But as I said the same sort of problem appears
with both.

I'll open up a BZ against the issue and try to get the best info in
there that I can. I am better at debugging programs not the kernel so
this is rather a new walk for me.

Thanks for the help,

- -Erinn
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