linux-kernel - Re: [PATCH v2 4/5] mm, kswapd: replace kswapd compaction with waking up kcompactd

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Message-ID: <56DD4DBC.5090705@suse.cz>
Date:	Mon, 7 Mar 2016 10:45:32 +0100
From:	Vlastimil Babka <vbabka@...e.cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Joonsoo Kim <js1304@...il.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Rik van Riel <riel@...hat.com>,
	Mel Gorman <mgorman@...hsingularity.net>,
	David Rientjes <rientjes@...gle.com>,
	Michal Hocko <mhocko@...e.com>,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH v2 4/5] mm, kswapd: replace kswapd compaction with waking
 up kcompactd

On 03/05/2016 12:25 AM, Andrew Morton wrote:
> On Wed, 2 Mar 2016 16:22:43 +0100 Vlastimil Babka <vbabka@...e.cz> wrote:
>
>> On 03/02/2016 03:59 PM, Joonsoo Kim wrote:
>>> 2016-03-02 23:40 GMT+09:00 Vlastimil Babka <vbabka@...e.cz>:
>>>> On 03/02/2016 03:22 PM, Joonsoo Kim wrote:
>>>>
>>>> So I understand that patch 5 would be just about this?
>>>>
>>>> -       if (compaction_restarting(zone, cc->order) && !current_is_kcompactd())
>>>> +       if (compaction_restarting(zone, cc->order))
>>>>                   __reset_isolation_suitable(zone);
>>>
>>> Yeah, you understand correctly. :)
>>>
>>>> I'm more inclined to fold it in that case.
>>>
>>> Patch would be just simple, but, I guess it would cause some difference
>>> in test result. But, I'm okay for folding.
>>
>> Thanks. Andrew, should I send now patch folding patch 4/5 and 5/5 with
>> all the accumulated fixlets (including those I sent earlier today) and
>> combined changelog, or do you want to apply the new fixlets separately
>> first and let them sit for a week or so? In any case, sorry for the churn.
>
> Did I get everything?

Yeah, thanks! I'll send the squash in few days (also with a vmstat typo 
fix that Hugh pointed out in another thread).

> http://ozlabs.org/~akpm/mmots/broken-out/mm-kswapd-remove-bogus-check-of-balance_classzone_idx.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-compaction-introduce-kcompactd.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-compaction-introduce-kcompactd-fix.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-compaction-introduce-kcompactd-fix-2.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-compaction-introduce-kcompactd-fix-3.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-memory-hotplug-small-cleanup-in-online_pages.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-kswapd-replace-kswapd-compaction-with-waking-up-kcompactd.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-kswapd-replace-kswapd-compaction-with-waking-up-kcompactd-fix.patch
> http://ozlabs.org/~akpm/mmots/broken-out/mm-compaction-adapt-isolation_suitable-flushing-to-kcompactd.patch
>