From: Johannes Weiner <jweiner@redhat.com>
To: Minchan Kim <minchan.kim@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>, Mel Gorman <mgorman@suse.de>,
Rik van Riel <riel@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH] vmscan: Do reclaim stall in case of mlocked page.
Date: Wed, 31 Aug 2011 19:30:31 +0200 [thread overview]
Message-ID: <20110831173031.GA21571@redhat.com> (raw)
In-Reply-To: <1321285043-3470-1-git-send-email-minchan.kim@gmail.com>
On Tue, Nov 15, 2011 at 12:37:23AM +0900, Minchan Kim wrote:
> [1] made avoid unnecessary reclaim stall when second shrink_page_list(ie, synchronous
> shrink_page_list) try to reclaim page_list which has not-dirty pages.
> But it seems rather awkawrd on unevictable page.
> The unevictable page in shrink_page_list would be moved into unevictable lru from page_list.
> So it would be not on page_list when shrink_page_list returns.
> Nevertheless it skips reclaim stall.
>
> This patch fixes it so that it can do reclaim stall in case of mixing mlocked pages
> and writeback pages on page_list.
>
> [1] 7d3579e,vmscan: narrow the scenarios in whcih lumpy reclaim uses synchrounous reclaim
Lumpy isolates physically contiguous in the hope to free a bunch of
pages that can be merged to a bigger page. If an unevictable page is
encountered, the chance of that is gone. Why invest the allocation
latency when we know it won't pay off anymore?
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next prev parent reply other threads:[~2011-08-31 17:30 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-14 15:37 [PATCH] vmscan: Do reclaim stall in case of mlocked page Minchan Kim
2011-08-31 17:30 ` Johannes Weiner [this message]
2011-09-02 2:19 ` Minchan Kim
2011-09-05 8:33 ` Johannes Weiner
2011-09-06 15:11 ` Minchan Kim
2011-09-06 15:39 ` Mel Gorman
2011-09-06 15:51 ` Minchan Kim
-- strict thread matches above, loose matches on Subject: below --
2011-08-31 15:42 Minchan Kim
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