Re: [PATCH 4.19 23/30] x86_64: increase stack size for KASAN_EXTRA

[Andrey Ryabinin]

On 2/21/19 6:26 PM, Greg Kroah-Hartman wrote:
> On Thu, Feb 21, 2019 at 06:00:06PM +0300, Andrey Ryabinin wrote:
>> On 2/21/19 5:36 PM, Greg Kroah-Hartman wrote:
>>> 4.19-stable review patch.  If anyone has any objections, please let me know.
>>>
>>
>> Drop it please. It increases kernel stack up to 4-order which is above 
>> PAGE_ALLOC_COSTLY_ORDER.
>> This changes behavior of the fork() by making it fail with -ENOMEM due of 
>> high memory fragmentation.
>>
>> The patch that removes KASAN_EXTRA (not in Linus's tree yet) would be a 
>> better fix for the problem.
> 
> Ok, should this also be dropped from 4.20.y?
> 

Yes.