From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>, Rik van Riel <riel@redhat.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Larry Woodman <lwoodman@redhat.com>
Subject: Re: [RFC][PATCH v2 0/8] vmscan: AIM7 scalability improvement
Date: Thu, 10 Dec 2009 16:53:24 +0900 (JST) [thread overview]
Message-ID: <20091210165208.256B.A69D9226@jp.fujitsu.com> (raw)
In-Reply-To: <20091210154822.2550.A69D9226@jp.fujitsu.com>
> Larry Woodman reported current VM has big performance regression when
> AIM7 benchmark. It use very much processes and fork/exit/page-fault frequently.
> (i.e. it makes serious lock contention of ptelock and anon_vma-lock.)
>
> At 2.6.28, we removed calc_reclaim_mapped() and it made vmscan, then
> vmscan always call page_referenced() although VM pressure is low.
> It increased lock contention more, unfortunately.
>
>
> Larry, can you please try this patch series on your big box?
this patches is made ontop mmotm1208.
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prev parent reply other threads:[~2009-12-10 7:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-10 7:28 [RFC][PATCH v2 0/8] vmscan: AIM7 scalability improvement KOSAKI Motohiro
2009-12-10 7:29 ` [RFC][PATCH v2 1/8] Replace page_mapping_inuse() with page_mapped() KOSAKI Motohiro
2009-12-10 7:30 ` [RFC][PATCH v2 2/8] Introduce __page_check_address KOSAKI Motohiro
2009-12-10 7:31 ` [RFC][PATCH v2 3/8] VM_LOCKED check don't need pte lock KOSAKI Motohiro
2009-12-10 7:32 ` [RFC][PATCH v2 4/8] Replace page_referenced() with wipe_page_reference() KOSAKI Motohiro
2009-12-10 12:54 ` Larry Woodman
2009-12-10 23:46 ` KOSAKI Motohiro
2009-12-10 7:32 ` [RFC][PATCH v2 5/8] Don't deactivate the page if trylock_page() is failed KOSAKI Motohiro
2009-12-10 7:33 ` [RFC][PATCH v2 6/8] wipe_page_reference return SWAP_AGAIN if VM pressulre is low and lock contention is detected KOSAKI Motohiro
2009-12-10 7:34 ` [RFC][PATCH v2 7/8] Try to mark PG_mlocked if wipe_page_reference find VM_LOCKED vma KOSAKI Motohiro
2009-12-10 7:35 ` [RFC][PATCH v2 8/8] Don't deactivate many touched page KOSAKI Motohiro
2009-12-11 2:11 ` Minchan Kim
2009-12-10 7:53 ` KOSAKI Motohiro [this message]
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