Re: [GIT PULL] bcache changes for 3.17

From: Stefan Priebe <s.priebe@profihost.ag>
To: Kent Overstreet <kmo@daterainc.com>, Jens Axboe <axboe@kernel.dk>
Cc: Arne Wiebalck <Arne.Wiebalck@cern.ch>,
	Peter Kieser <peter@kieser.ca>, "eddie@ehuk.net" <eddie@ehuk.net>,
	Francis Moreau <francis.moro@gmail.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-bcache@vger.kernel.org" <linux-bcache@vger.kernel.org>,
	stable <stable@vger.kernel.org>
Subject: Re: [GIT PULL] bcache changes for 3.17
Date: Fri, 05 Sep 2014 20:46:01 +0200	[thread overview]
Message-ID: <540A04E9.6020606@profihost.ag> (raw)
In-Reply-To: <20140905183301.GB17903@daterainc.com>

Am 05.09.2014 20:33, schrieb Kent Overstreet:
> On Fri, Sep 05, 2014 at 11:10:13AM -0600, Jens Axboe wrote:
>> On 09/05/2014 11:03 AM, Arne Wiebalck wrote:
>>>
>>> On Sep 5, 2014, at 6:41 PM, Peter Kieser <peter@kieser.ca>
>>>   wrote:
>>>
>>>>
>>>> On 2014-09-05 8:37 AM, Eddie Chapman wrote:
>>>>> On 05/09/14 15:17, Jens Axboe wrote:
>>>>>> (from oldest to newest). And that's just from 3.16 to 3.17-rc3, going
>>>>>> all the way back to 3.10 would be a lot of work. If there's anyone that
>>>>>> cares about bcache on stable kernels (and actually use it), now would be
>>>>>> a good time to pipe up.
>>>>>
>>>>> Just "piping up" as I care about bcache and actually use it in production on 3.10! Shame I don't have the knowledge to try and backport these though :-)
>>>>>
>>>>> Eddie
>>>>
>>>> I'm "piping up" as well, I use bcache on 3.10 in production.
>>>>
>>>> -Peter
>>>>
>>>
>>>
>>> More "piping up": we currently use bcache on a few nodes in production, on 3.14 and 3.15, and plan to roll it out on a wider scale now.
>>> If necessary we'll go with these kernels, but we'd certainly prefer our usual 3.10-based CentOS kernel.
>>
>> OK, so we definitely have people using it in production. My concern was
>> that whomever does the backport of the appropriate patches to 3.10/14/15
>> stable would have an audience for getting some amount of testing of such
>> a patch series.
>>
>> Now we just need someone to line up to do the work...
>
> I can try and make some time for backporting; if we've got people lined up for
> testing that will help a lot.
>
> Backporting fixes to 3.10 will be harder, but if memory serves there hasn't been
> as much churn since 3.14 so backporting fixes to then shouldn't be too bad. If
> Stefan wants to post what he's got for 3.10 though I can try and backport some
> more fixes on top of that, though

You'll find them here:
https://github.com/profihost/linux-stable/commits/bcache_latest_fixes

Most probably you don't want the last four.

Stefan

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