Re: [uml-devel] UML regression with latest RC 4.11-rc2

[Richard W. <ri...@no...>]

Am 17.03.2017 um 18:04 schrieb Anton Ivanov:
> On 17/03/17 16:56, Richard Weinberger wrote:
>> Anton,
>>
>> On Fri, Mar 17, 2017 at 8:51 AM, Anton Ivanov
>> <ant...@ko...> wrote:
>>> Hi list, hi Richard
>>>
>>> There is an extra check in mm/mmap.c which now throws a WARN on every
>>> page in making UML unusable with the latest 4.11-rc2
>> Which WARN? Can you find the offending commit?
> 
> mm/mmap.c line 1112

Okay, this triggers since:

commit e86f15ee64d8ee46255d964d55f74f5ba9af8c36
Author: Andrea Arcangeli <aar...@re...>
Date:   Fri Oct 7 17:01:28 2016 -0700

    mm: vma_merge: fix vm_page_prot SMP race condition against rmap_walk

But you have to enable VM debugging to see it.

Thanks,
//richard