On 2014/9/4 15:12, Li Zefan wrote:
> Cc: Zhang Zhen <zhenzhang.zhang@xxxxxxxxxx>
>
> On 2014/9/4 7:29, Greg KH wrote:
>> On Wed, Sep 03, 2014 at 04:25:30PM -0700, Greg KH wrote:
>>> On Wed, Sep 03, 2014 at 04:01:22PM -0700, David Rientjes wrote:
>>>> On Wed, 3 Sep 2014, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
>>>>
>>>>>
>>>>> The patch below does not apply to the 3.10-stable tree.
>>>>
>>>> It applies fine to linux-3.10.53.
>>>
>>> Well, yes, but it breaks the build :)
>>>
>>>>> If someone wants it applied there, or to any other stable or longterm
>>>>> tree, then please email the backport, including the original git commit
>>>>> id to <stable@xxxxxxxxxxxxxxx>.
>>>>>
>>>>
>>>> I'm assuming that this is a report that the build fails when it's applied,
>>>> although that's not clear. It requires commit
>>>> 0c740d0afc3b ("introduce for_each_thread() to replace the buggy
>>>> while_each_thread()") to build.
>>>
>>> Ok, I'll queue that up before this one and see if that works better...
>>
>> Nope, that one doesn't apply cleanly, and the backport wasn't "obvious"
>> so I'll have to keep this one out of 3.10-stable for now. Unless
>> someone wants to provide me a backport of 0c740d0afc3b that works?
>>
>
> Coincidently we're backporting another bugfix that needs the same prerequisites
> as this one does.
>
> You can cherry-pick those upstream commits:
>
> 80628ca06c5d kernel/fork.c:copy_process(): unify CLONE_THREAD-or-thread_group_leader code
> 0c740d0afc3b introduce for_each_thread() to replace the buggy while_each_thread()
> 1da4db0cd5c8 oom_kill: change oom_kill.c to use for_each_thread()
> 4449a51a7c28 vm_is_stack: use for_each_thread() rather then buggy while_each_thread()
>
> The first two commits are prerequisites, and 1da4db0cd5c8 fixes a bug
> we encountered.
>
> Credit goes to Zhang Zhen.
>
We just figured out another two small bugfixes we'd better also backport,
they were sent with 0c740d0afc3b and 1da4db0cd5c8 as a patchset.
80628ca06c5d kernel/fork.c:copy_process(): unify CLONE_THREAD-or-thread_group_leader code
0c740d0afc3b introduce for_each_thread() to replace the buggy while_each_thread()
1da4db0cd5c8 oom_kill: change oom_kill.c to use for_each_thread()
ad96244179fb oom_kill: has_intersects_mems_allowed() needs rcu_read_lock()
4d4048be8a93 oom_kill: add rcu_read_lock() into find_lock_task_mm()
4449a51a7c28 vm_is_stack: use for_each_thread() rather then buggy while_each_thread()
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