linux-ext4 - Re: ext4_da_update_reserve_space warning fix not in stable

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Message-ID: <54AD9422.2050803@akamai.com>
Date:	Wed, 7 Jan 2015 14:16:34 -0600
From:	Josh Hunt <johunt@...mai.com>
To:	Theodore Ts'o <tytso@....edu>
CC:	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"adilger.kernel@...ger.ca" <adilger.kernel@...ger.ca>,
	"jack@...e.cz" <jack@...e.cz>
Subject: Re: ext4_da_update_reserve_space warning fix not in stable


On 01/07/2015 01:53 PM, Theodore Ts'o wrote:
> On Wed, Jan 07, 2015 at 12:12:59PM -0600, Josh Hunt wrote:
>> We are hitting the following warning in the field pretty frequently on the
>> latest 3.10 stable kernel:
>> [11708.763067] WARNING: at fs/ext4/inode.c:363
>> ext4_da_update_reserve_space+0x261/0x280 [ext4]()
>>
>> The issue was resolved via "ext4: fix warning in
>> ext4_da_update_reserve_space()" (7d7345322d60ed), but the fix was not
>> submitted as a stable update for 3.10. I was wondering if there's a reason
>> why this was not done, or if it was just overlooked?
>>
>> The patch appears to have a dependency on "quota: provide interface for
>> readding allocated space into reserved space" (1c8924eb106c1ac), so I think
>> both would need to be submitted if you feel it's possible.
>
> Have you tried backporting these two commits, and does it fix the
> problem for you?

Yeah I backported both. They both apply cleanly to 3.10 iirc. I will 
report back if they do not.

Yes, moving both of these to 3.10 fixes the problem for me.

>
> I think it was mostly an oversight, although it might have also been
> my thinking that it was only a warning, so it wasn't that critical to
> backport.  To be honest, I can't really recall exactly what happened
> with that patch at this point.
>
> If it does seen to work for you, I'm happy to suggest to the 3.10
> stable kernel maintainers to have it be backported.

That would be great, thanks!

Josh
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