[CRIU] [PATCH 0/2] files: Add ability to skip certain files for size check

[Pavel Emelyanov]

On 03/23/2017 07:09 PM, Cyrill Gorcunov wrote:
> On Thu, Mar 23, 2017 at 06:50:23PM +0300, Pavel Emelyanov wrote:
>> On 03/23/2017 06:20 PM, Cyrill Gorcunov wrote:
>>> During containers testing we discovered that if some application
>>> ran acct() syscall the size check upon restore will fail becaue
>>> kernel updates the file at task exit.
>>>
>>> At the moment there is no way to figure out which file been used
>>> in acct() syscall so we should provide a user an option to be
>>> able to skip such specific files on both dump and restore.
>>>
>>> For this sake --skip-fsize-path option introduced.
>>
>> I don't like the idea of such an option :( I'd rather agree on
>> some quirk inside the criu code to skip files of that kind.
> 
> The option is just fine. Otherwise we leave customers without
> ability to restore applications which use acct() syscall. 

Come on, for Virtuozzo case, you can put any hack into vzkernel and
keep tiny patch in criu .spec file ;)

> How mayn quirks we will have to keep?

With this option, you'll have to maintain the same set of quirks anyway.
But in another (hell knows which) place.

> It is not hw which is mostly
> immutable but rather anyone can call for acct() and ruine
> restore procedure.
> .
>