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Message-ID: <1461175544.3200.20.camel@redhat.com>
Subject: Re: [PATCH 4.6] mm: wake kcompactd before kswapd's short sleep
From: Rik van Riel <riel@redhat.com>
To: Vlastimil Babka <vbabka@suse.cz>,
        Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Andrea Arcangeli <aarcange@redhat.com>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Mel Gorman <mgorman@techsingularity.net>,
        David Rientjes <rientjes@google.com>, Michal Hocko <mhocko@suse.com>,
        Johannes Weiner <hannes@cmpxchg.org>
Date: Wed, 20 Apr 2016 14:05:44 -0400
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On Tue, 2016-04-19 at 22:36 +0200, Vlastimil Babka wrote:
> When kswapd goes to sleep it checks if the node is balanced and at
> first it
> sleeps only for HZ/10 time, then rechecks if the node is still
> balanced and
> nobody has woken it during the initial sleep. Only then it goes fully
> sleep
> until an allocation slowpath wakes it up again.
> 

Reviewed-by: Rik van Riel <riel@redhat.com>