linux-kernel - Re: mmotm 2019-07-24-21-39 uploaded (mm/memcontrol)

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Date:   Thu, 25 Jul 2019 16:51:15 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     broonie@...nel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-next@...r.kernel.org, mhocko@...e.cz,
        mm-commits@...r.kernel.org, sfr@...b.auug.org.au,
        Chris Down <chris@...isdown.name>
Subject: Re: mmotm 2019-07-24-21-39 uploaded (mm/memcontrol)

On 7/25/19 4:39 PM, Andrew Morton wrote:
> On Thu, 25 Jul 2019 15:02:59 -0700 Randy Dunlap <rdunlap@...radead.org> wrote:
> 
>> On 7/24/19 9:40 PM, akpm@...ux-foundation.org wrote:
>>> The mm-of-the-moment snapshot 2019-07-24-21-39 has been uploaded to
>>>
>>>    http://www.ozlabs.org/~akpm/mmotm/
>>>
>>> mmotm-readme.txt says
>>>
>>> README for mm-of-the-moment:
>>>
>>> http://www.ozlabs.org/~akpm/mmotm/
>>>
>>> This is a snapshot of my -mm patch queue.  Uploaded at random hopefully
>>> more than once a week.
>>>
>>> You will need quilt to apply these patches to the latest Linus release (5.x
>>> or 5.x-rcY).  The series file is in broken-out.tar.gz and is duplicated in
>>> http://ozlabs.org/~akpm/mmotm/series
>>>
>>
>> on i386:
>>
>> ld: mm/memcontrol.o: in function `mem_cgroup_handle_over_high':
>> memcontrol.c:(.text+0x6235): undefined reference to `__udivdi3'
> 
> Thanks.  This?


Yes, that works.  Thanks.

Acked-by: Randy Dunlap <rdunlap@...radead.org>


> --- a/mm/memcontrol.c~mm-throttle-allocators-when-failing-reclaim-over-memoryhigh-fix-fix
> +++ a/mm/memcontrol.c
> @@ -2414,8 +2414,9 @@ void mem_cgroup_handle_over_high(void)
>  	 */
>  	clamped_high = max(high, 1UL);
>  
> -	overage = ((u64)(usage - high) << MEMCG_DELAY_PRECISION_SHIFT)
> -		/ clamped_high;
> +	overage = (u64)(usage - high) << MEMCG_DELAY_PRECISION_SHIFT;
> +	do_div(overage, clamped_high);
> +
>  	penalty_jiffies = ((u64)overage * overage * HZ)
>  		>> (MEMCG_DELAY_PRECISION_SHIFT + MEMCG_DELAY_SCALING_SHIFT);
>  
> _
> 


-- 
~Randy