linux-kernel - Re: [PATCH 1/2] livepatch: Revert "livepatch: enforce patch stacking semantics"

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Message-ID: <54C0C5EC.9080507@huawei.com>
Date:	Thu, 22 Jan 2015 17:42:04 +0800
From:	Li Bin <huawei.libin@...wei.com>
To:	Miroslav Benes <mbenes@...e.cz>
CC:	Josh Poimboeuf <jpoimboe@...hat.com>,
	Seth Jennings <sjenning@...hat.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Vojtech Pavlik <vojtech@...e.cz>, Jiri Slaby <jslaby@...e.cz>,
	<live-patching@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<lizefan@...wei.com>, <guohanjun@...wei.com>,
	<zhangdianfang@...wei.com>, <xiexiuqi@...wei.com>
Subject: Re: [PATCH 1/2] livepatch: Revert "livepatch: enforce patch stacking
 semantics"

On 2015/1/22 17:15, Miroslav Benes wrote:
> On Thu, 22 Jan 2015, Li Bin wrote:
> 
>> On 2015/1/21 17:07, Li Bin wrote:
>>> This reverts commit 83a90bb1345767f0cb96d242fd8b9db44b2b0e17.
>>>
>>> The method that only allowing the topmost patch on the stack to be
>>> enabled or disabled is unreasonable. Such as the following case:
>>>
>>> 	- do live patch1
>>> 	- disable patch1
>>> 	- do live patch2 //error
>>>
>>> Now, we will never be able to do new live patch unless disabing the
>>> patch1 although there is no dependencies.
>>>
>>
>> Correct the log:
>> ... unless disabling the patch1 although ... -->
>> ... unless enabling the patch1 firstly although ...
> 
> Yes, but in such situation you can unregister patch1 and proceed with new 
> live patch. No problem. As Jiri has already written. Or are we missing 
> something?
> 

Ok, that is before process with new live patch we must unregister the disabled
patch1 previously. Is there need some message to avoid confusing the user?

Thanks,
Li Bin

> Regards,
> --
> Miroslav Benes
> SUSE Labs
> --
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> .
> 


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