linux-kernel - Re: [PATCH 4.4 34/74] arm64: vmemmap: use virtual projection of linear region

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Message-Id: <7B1BB6C4-2D05-4197-A180-3274FCBD1A5F@linaro.org>
Date:	Sat, 12 Mar 2016 16:14:04 +0800
From:	Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	Will Deacon <will.deacon@....com>
Subject: Re: [PATCH 4.4 34/74] arm64: vmemmap: use virtual projection of linear region



> On 12 mrt. 2016, at 14:05, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
> 
>> On Sat, Mar 12, 2016 at 01:55:44PM +0800, Ard Biesheuvel wrote:
>> 
>> 
>>>> On 12 mrt. 2016, at 13:50, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
>>>> 
>>>>> On Sat, Mar 12, 2016 at 08:51:26AM +0700, Ard Biesheuvel wrote:
>>>>>> On 8 March 2016 at 20:45, Ard Biesheuvel <ard.biesheuvel@...aro.org> wrote:
>>>>>>> On 8 March 2016 at 20:44, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
>>>>>>>> On Tue, Mar 08, 2016 at 05:40:14PM +0700, Ard Biesheuvel wrote:
>>>>>>>> On 8 March 2016 at 07:02, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
>>>>>>>> 4.4-stable review patch.  If anyone has any objections, please let me know.
>>>>>>> 
>>>>>>> Please hold off on this one. We are seeing some breakage on 64k pages systems
>>>>>> 
>>>>>> If this problem is also in Linus's tree, I'd like to keep it in to keep
>>>>>> things "bug compatible".  Please let me know what fix that I should
>>>>>> apply to resolve this.
>>>>> 
>>>>> I am about to send out the patch that should fix this, so I will put you on cc.
>>>> 
>>>> Not sure what happened here, but this patch is in 4.4-stable now, but
>>>> the fix is not.
>>> 
>>> Because the fix came out _after_ I released that kernel?  I can't go
>>> back in time...
>> 
>> I kind of got the whole chronology thing. I am just surprised you
>> pulled only that patch (and not the fix) anyway, since you knew it
>> would break things, and that a fix was on the way.
> 
> That way I knew you all would work quickly to get the fix in :)
> 
> We do this all the time, nothing new here, being "bug compatible" is
> good...
> 

Do you get many requests from stable tree users for this bug compatibility with mainline?