From: Mel Gorman <mel@csn.ul.ie>
To: Christoph Hellwig <hch@infradead.org>
Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
Linux Kernel List <linux-kernel@vger.kernel.org>,
Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Minchan Kim <minchan.kim@gmail.com>,
Wu Fengguang <fengguang.wu@intel.com>,
Andrea Arcangeli <aarcange@redhat.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Dave Chinner <david@fromorbit.com>,
Chris Mason <chris.mason@oracle.com>,
Christoph Hellwig <hch@lst.de>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 09/10] vmscan: Do not writeback filesystem pages in direct reclaim
Date: Fri, 29 Oct 2010 11:26:46 +0100 [thread overview]
Message-ID: <20101029102646.GI4896@csn.ul.ie> (raw)
In-Reply-To: <20101028215046.GA15586@infradead.org>
On Thu, Oct 28, 2010 at 05:50:46PM -0400, Christoph Hellwig wrote:
> Looks like this once again didn't get merged for 2.6.37. Any reason
> for that?
>
There are still concerns as to whether this is a good idea or or whether we
are papering over the fact that there are too many dirty pages at the end
of the LRU. The tracepoints necessary to track the dirty pages encountered
went in this cycle as well as some writeback and congestion-waiting changes.
I was waiting for some of the writeback churn to die down before
revisiting this. The ideal point to reach is "we hardly ever encounter
dirty pages so disabling direct writeback has no impact".
--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2010-10-29 10:26 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-06 10:47 [PATCH 0/9] Reduce latencies and improve overall reclaim efficiency v1 Mel Gorman
2010-09-06 10:47 ` [PATCH 01/10] tracing, vmscan: Add trace events for LRU list shrinking Mel Gorman
2010-09-06 10:47 ` [PATCH 02/10] writeback: Account for time spent congestion_waited Mel Gorman
2010-09-06 10:47 ` [PATCH 03/10] writeback: Do not congestion sleep if there are no congested BDIs or significant writeback Mel Gorman
2010-09-07 15:25 ` Minchan Kim
2010-09-08 11:04 ` Mel Gorman
2010-09-08 14:52 ` Minchan Kim
2010-09-09 8:54 ` Mel Gorman
2010-09-12 15:37 ` Minchan Kim
2010-09-13 8:55 ` Mel Gorman
2010-09-13 9:48 ` Minchan Kim
2010-09-13 10:07 ` Mel Gorman
2010-09-13 10:20 ` Minchan Kim
2010-09-13 10:30 ` Mel Gorman
2010-09-08 21:23 ` Andrew Morton
2010-09-09 10:43 ` Mel Gorman
2010-09-09 3:02 ` KAMEZAWA Hiroyuki
2010-09-09 8:58 ` Mel Gorman
2010-09-06 10:47 ` [PATCH 04/10] vmscan: Synchronous lumpy reclaim should not call congestion_wait() Mel Gorman
2010-09-07 15:26 ` Minchan Kim
2010-09-08 6:15 ` Johannes Weiner
2010-09-08 11:25 ` Wu Fengguang
2010-09-09 3:03 ` KAMEZAWA Hiroyuki
2010-09-06 10:47 ` [PATCH 05/10] vmscan: Synchrounous lumpy reclaim use lock_page() instead trylock_page() Mel Gorman
2010-09-07 15:28 ` Minchan Kim
2010-09-08 6:16 ` Johannes Weiner
2010-09-08 11:28 ` Wu Fengguang
2010-09-09 3:04 ` KAMEZAWA Hiroyuki
2010-09-09 3:15 ` KAMEZAWA Hiroyuki
2010-09-09 3:25 ` Wu Fengguang
2010-09-09 4:13 ` KOSAKI Motohiro
2010-09-09 9:22 ` Mel Gorman
2010-09-10 10:25 ` KOSAKI Motohiro
2010-09-10 10:33 ` KOSAKI Motohiro
2010-09-13 9:14 ` Mel Gorman
2010-09-14 10:14 ` KOSAKI Motohiro
2010-09-06 10:47 ` [PATCH 06/10] vmscan: Narrow the scenarios lumpy reclaim uses synchrounous reclaim Mel Gorman
2010-09-09 3:14 ` KAMEZAWA Hiroyuki
2010-09-06 10:47 ` [PATCH 07/10] vmscan: Remove dead code in shrink_inactive_list() Mel Gorman
2010-09-07 15:33 ` Minchan Kim
2010-09-06 10:47 ` [PATCH 08/10] vmscan: isolated_lru_pages() stop neighbour search if neighbour cannot be isolated Mel Gorman
2010-09-07 15:37 ` Minchan Kim
2010-09-08 11:12 ` Mel Gorman
2010-09-08 14:58 ` Minchan Kim
2010-09-08 11:37 ` Wu Fengguang
2010-09-08 12:50 ` Mel Gorman
2010-09-08 13:14 ` Wu Fengguang
2010-09-08 13:27 ` Mel Gorman
2010-09-09 3:17 ` KAMEZAWA Hiroyuki
2010-09-06 10:47 ` [PATCH 09/10] vmscan: Do not writeback filesystem pages in direct reclaim Mel Gorman
2010-09-13 13:31 ` Wu Fengguang
2010-09-13 13:55 ` Mel Gorman
2010-09-13 14:33 ` Wu Fengguang
2010-10-28 21:50 ` Christoph Hellwig
2010-10-29 10:26 ` Mel Gorman [this message]
2010-09-06 10:47 ` [PATCH 10/10] vmscan: Kick flusher threads to clean pages when reclaim is encountering dirty pages Mel Gorman
2010-09-09 3:22 ` KAMEZAWA Hiroyuki
2010-09-09 9:32 ` Mel Gorman
2010-09-13 0:53 ` KAMEZAWA Hiroyuki
2010-09-13 13:48 ` Wu Fengguang
2010-09-13 14:10 ` Mel Gorman
2010-09-13 14:41 ` Wu Fengguang
2010-09-06 10:49 ` [PATCH 0/9] Reduce latencies and improve overall reclaim efficiency v1 Mel Gorman
2010-09-08 3:14 ` KOSAKI Motohiro
2010-09-08 8:38 ` Mel Gorman
2010-09-13 23:10 ` Minchan Kim
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20101029102646.GI4896@csn.ul.ie \
--to=mel@csn.ul.ie \
--cc=aarcange@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=chris.mason@oracle.com \
--cc=david@fromorbit.com \
--cc=fengguang.wu@intel.com \
--cc=hannes@cmpxchg.org \
--cc=hch@infradead.org \
--cc=hch@lst.de \
--cc=kamezawa.hiroyu@jp.fujitsu.com \
--cc=kosaki.motohiro@jp.fujitsu.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=minchan.kim@gmail.com \
--cc=riel@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).