From: Johannes Weiner <hannes@cmpxchg.org>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: linux-mm@kvack.org, Johannes Weiner <jweiner@redhat.com>,
Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>,
Hugh Dickins <hughd@google.com>,
Richard Davies <richard@arachsys.com>,
Shaohua Li <shli@kernel.org>, Rafael Aquini <aquini@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Hush Bensen <hush.bensen@gmail.com>
Subject: Re: [PATCH 5/9] mm: compaction: don't require high order pages below min wmark
Date: Tue, 6 Aug 2013 09:23:21 -0400 [thread overview]
Message-ID: <20130806132321.GH1845@cmpxchg.org> (raw)
In-Reply-To: <1375459596-30061-6-git-send-email-aarcange@redhat.com>
On Fri, Aug 02, 2013 at 06:06:32PM +0200, Andrea Arcangeli wrote:
> The min wmark should be satisfied with just 1 hugepage. And the other
> wmarks should be adjusted accordingly. We need to succeed the low
> wmark check if there's some significant amount of 0 order pages, but
> we don't need plenty of high order pages because the PF_MEMALLOC paths
> don't require those. Creating a ton of high order pages that cannot be
> allocated by the high order allocation paths (no PF_MEMALLOC) is quite
> wasteful because they can be splitted in lower order pages before
> anybody has a chance to allocate them.
>
> Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
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next prev parent reply other threads:[~2013-08-06 13:23 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-02 16:06 [PATCH 0/9] adding compaction to zone_reclaim_mode v3 Andrea Arcangeli
2013-08-02 16:06 ` [PATCH 1/9] mm: zone_reclaim: remove ZONE_RECLAIM_LOCKED Andrea Arcangeli
2013-08-05 18:30 ` Johannes Weiner
2013-08-07 15:13 ` Mel Gorman
2013-08-02 16:06 ` [PATCH 2/9] mm: zone_reclaim: compaction: scan all memory with /proc/sys/vm/compact_memory Andrea Arcangeli
2013-08-05 18:45 ` Johannes Weiner
2013-08-06 5:50 ` Andrea Arcangeli
2013-08-02 16:06 ` [PATCH 3/9] mm: zone_reclaim: compaction: don't depend on kswapd to invoke reset_isolation_suitable Andrea Arcangeli
2013-08-05 19:32 ` Johannes Weiner
2013-08-02 16:06 ` [PATCH 4/9] mm: zone_reclaim: compaction: reset before initializing the scan cursors Andrea Arcangeli
2013-08-05 19:44 ` Johannes Weiner
2013-08-02 16:06 ` [PATCH 5/9] mm: compaction: don't require high order pages below min wmark Andrea Arcangeli
2013-08-05 18:35 ` Rik van Riel
2013-08-06 13:23 ` Johannes Weiner [this message]
2013-08-07 15:42 ` Mel Gorman
2013-08-07 16:14 ` Andrea Arcangeli
2013-08-07 16:47 ` Mel Gorman
2013-08-08 0:59 ` Andrea Arcangeli
2013-08-02 16:06 ` [PATCH 6/9] mm: zone_reclaim: compaction: increase the high order pages in the watermarks Andrea Arcangeli
2013-08-05 18:36 ` Rik van Riel
2013-08-06 16:08 ` Johannes Weiner
2013-08-06 18:52 ` Johannes Weiner
2013-08-07 13:18 ` Andrea Arcangeli
2013-08-07 15:43 ` Mel Gorman
2013-08-02 16:06 ` [PATCH 7/9] mm: zone_reclaim: compaction: export compact_zone_order() Andrea Arcangeli
2013-08-05 18:37 ` Rik van Riel
2013-08-07 15:48 ` Mel Gorman
2013-08-02 16:06 ` [PATCH 8/9] mm: zone_reclaim: after a successful zone_reclaim check the min watermark Andrea Arcangeli
2013-08-05 18:38 ` Rik van Riel
2013-08-07 15:53 ` Mel Gorman
2013-08-02 16:06 ` [PATCH 9/9] mm: zone_reclaim: compaction: add compaction to zone_reclaim_mode Andrea Arcangeli
2013-08-04 16:55 ` Andrea Arcangeli
2013-08-05 18:38 ` Rik van Riel
2013-08-07 16:18 ` Mel Gorman
2013-08-07 23:48 ` Andrea Arcangeli
2013-08-08 8:22 ` Mel Gorman
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