linux-kernel - Re: [PATCH 4.4 25/26] blk: Ensure users for current->bio

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Message-ID: <CAMGffEmb38GNWtWJsF1ZKEhiQjyspRNxcz4ogTwg6jDcAQOLsw@mail.gmail.com>
Date:   Fri, 7 Apr 2017 15:03:05 +0200
From:   Jinpu Wang <jinpu.wang@...fitbricks.com>
To:     Ben Hutchings <ben.hutchings@...ethink.co.uk>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>, NeilBrown <neilb@...e.com>,
        Jens Axboe <axboe@...com>
Subject: Re: [PATCH 4.4 25/26] blk: Ensure users for current->bio_list can see
 the full list.

Hi Ben,

On Fri, Apr 7, 2017 at 2:45 PM, Ben Hutchings
<ben.hutchings@...ethink.co.uk> wrote:
> On Fri, 2017-04-07 at 10:33 +0200, Jinpu Wang wrote:
>> On Thu, Apr 6, 2017 at 8:17 PM, Ben Hutchings
>> <ben.hutchings@...ethink.co.uk> wrote:
>> > On Thu, 2017-04-06 at 10:38 +0200, Greg Kroah-Hartman wrote:
>> >> 4.4-stable review patch.  If anyone has any objections, please let me know.
>> >>
>> >> ------------------
>> >>
>> >> From: NeilBrown <neilb@...e.com>
>> >>
>> >> commit f5fe1b51905df7cfe4fdfd85c5fb7bc5b71a094f upstream.
> [...]
>> > Why did you drop the changes in drivers/md/dm.c?
> [...]
>> Because the code snip doesn't exist in 4.4.
>
> It does, and the upstream patch applies to it without any changes!  I'm
> objecting to this and the preceding patch until there's a proper
> explanation of why device-mapper should be excluded from the backport.
>
> I've attached an alternate version of this patch that has the
> device-mapper part restored.  While I haven't tested this (don't know
> what the test case would be) I think it is rather more likely to be a
> correct backport to 4.4.
>
> Ben.
>
> --
> Ben Hutchings
> Software Developer, Codethink Ltd.
>

Thanks, you're right, just found commit
cd8ad4d9eb6d9ee04e77b42c6a7a15eabada85ac was included in 4.4.55+,

We should use your backport!

-- 
Jack Wang
Linux Kernel Developer