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

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Message-ID: <54AEC55D.5020108@akamai.com>
Date:	Thu, 8 Jan 2015 11:58:53 -0600
From:	Josh Hunt <johunt@...mai.com>
To:	Jan Kara <jack@...e.cz>
CC:	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"tytso@....edu" <tytso@....edu>,
	"adilger.kernel@...ger.ca" <adilger.kernel@...ger.ca>
Subject: Re: ext4_da_update_reserve_space warning fix not in stable

On 01/08/2015 01:48 AM, Jan Kara wrote:
> On Wed 07-01-15 13:49:46, Josh Hunt wrote:
>> On 01/07/2015 01:21 PM, Jan Kara wrote:
>>> On Wed 07-01-15 12:12:59, 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.
>>>    Since the problem is relatively harmless, I think we didn't bother
>>> porting it to 3.10. Feel free to port those two patches to 3.10 and submit
>>> them to stable@...r.kernel.org.
>>
>> Thanks for the reply Jan.
>>
>> I've ported them locally to 3.10 and they seem to apply cleanly
>> as-is. I can submit the request to stable as long as you believe
>> there's no harm in doing so, or any other dependency which may be
>> required. My testing of a patched 3.10 with the two above patches
>> shows the warning no longer triggers as you report in your commit
>> log.
>    I'm not aware of any reason why these patches shouldn't be in 3.10 stable
> so just go ahead. Thanks!

It looks like there is a small merge conflict in one of the patches. I 
will respin it and submit to stable cc'ing you guys.

Thanks
Josh
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