From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: linux-fsdevel@vger.kernel.org, Jan Kara <jack@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>,
Dave Chinner <david@fromorbit.com>,
Greg Thelen <gthelen@google.com>,
Minchan Kim <minchan.kim@gmail.com>,
Vivek Goyal <vgoyal@redhat.com>,
Andrea Righi <arighi@develer.com>, linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 02/18] writeback: dirty position control
Date: Mon, 05 Sep 2011 17:05:57 +0200 [thread overview]
Message-ID: <1315235157.3191.6.camel@twins> (raw)
In-Reply-To: <20110904020914.848566742@intel.com>
On Sun, 2011-09-04 at 09:53 +0800, Wu Fengguang wrote:
> @@ -591,6 +790,7 @@ static void global_update_bandwidth(unsi
>
> void __bdi_update_bandwidth(struct backing_dev_info *bdi,
> unsigned long thresh,
> + unsigned long bg_thresh,
> unsigned long dirty,
> unsigned long bdi_thresh,
> unsigned long bdi_dirty,
> @@ -627,6 +827,7 @@ snapshot:
>
> static void bdi_update_bandwidth(struct backing_dev_info *bdi,
> unsigned long thresh,
> + unsigned long bg_thresh,
> unsigned long dirty,
> unsigned long bdi_thresh,
> unsigned long bdi_dirty,
> @@ -635,8 +836,8 @@ static void bdi_update_bandwidth(struct
> if (time_is_after_eq_jiffies(bdi->bw_time_stamp + BANDWIDTH_INTERVAL))
> return;
> spin_lock(&bdi->wb.list_lock);
> - __bdi_update_bandwidth(bdi, thresh, dirty, bdi_thresh, bdi_dirty,
> - start_time);
> + __bdi_update_bandwidth(bdi, thresh, bg_thresh, dirty,
> + bdi_thresh, bdi_dirty, start_time);
> spin_unlock(&bdi->wb.list_lock);
> }
>
> @@ -677,7 +878,8 @@ static void balance_dirty_pages(struct a
> * catch-up. This avoids (excessively) small writeouts
> * when the bdi limits are ramping up.
> */
> - if (nr_dirty <= (background_thresh + dirty_thresh) / 2)
> + if (nr_dirty <= dirty_freerun_ceiling(dirty_thresh,
> + background_thresh))
> break;
>
> bdi_thresh = bdi_dirty_limit(bdi, dirty_thresh);
> @@ -721,8 +923,9 @@ static void balance_dirty_pages(struct a
> if (!bdi->dirty_exceeded)
> bdi->dirty_exceeded = 1;
>
> - bdi_update_bandwidth(bdi, dirty_thresh, nr_dirty,
> - bdi_thresh, bdi_dirty, start_time);
> + bdi_update_bandwidth(bdi, dirty_thresh, background_thresh,
> + nr_dirty, bdi_thresh, bdi_dirty,
> + start_time);
>
> /* Note: nr_reclaimable denotes nr_dirty + nr_unstable.
> * Unstable writes are a feature of certain networked
> --- linux-next.orig/fs/fs-writeback.c 2011-08-26 15:57:18.000000000 +0800
> +++ linux-next/fs/fs-writeback.c 2011-08-26 15:57:20.000000000 +0800
> @@ -675,7 +675,7 @@ static inline bool over_bground_thresh(v
> static void wb_update_bandwidth(struct bdi_writeback *wb,
> unsigned long start_time)
> {
> - __bdi_update_bandwidth(wb->bdi, 0, 0, 0, 0, start_time);
> + __bdi_update_bandwidth(wb->bdi, 0, 0, 0, 0, 0, start_time);
> }
>
> /*
> --- linux-next.orig/include/linux/writeback.h 2011-08-26 15:57:18.000000000 +0800
> +++ linux-next/include/linux/writeback.h 2011-08-26 15:57:20.000000000 +0800
> @@ -141,6 +141,7 @@ unsigned long bdi_dirty_limit(struct bac
>
> void __bdi_update_bandwidth(struct backing_dev_info *bdi,
> unsigned long thresh,
> + unsigned long bg_thresh,
> unsigned long dirty,
> unsigned long bdi_thresh,
> unsigned long bdi_dirty,
All this function signature muck doesn't seem immediately relevant to
the introduction of bdi_position_ratio() since the new function isn't
actually used.
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: linux-fsdevel@vger.kernel.org, Jan Kara <jack@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>,
Dave Chinner <david@fromorbit.com>,
Greg Thelen <gthelen@google.com>,
Minchan Kim <minchan.kim@gmail.com>,
Vivek Goyal <vgoyal@redhat.com>,
Andrea Righi <arighi@develer.com>, linux-mm <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 02/18] writeback: dirty position control
Date: Mon, 05 Sep 2011 17:05:57 +0200 [thread overview]
Message-ID: <1315235157.3191.6.camel@twins> (raw)
In-Reply-To: <20110904020914.848566742@intel.com>
On Sun, 2011-09-04 at 09:53 +0800, Wu Fengguang wrote:
> @@ -591,6 +790,7 @@ static void global_update_bandwidth(unsi
>
> void __bdi_update_bandwidth(struct backing_dev_info *bdi,
> unsigned long thresh,
> + unsigned long bg_thresh,
> unsigned long dirty,
> unsigned long bdi_thresh,
> unsigned long bdi_dirty,
> @@ -627,6 +827,7 @@ snapshot:
>
> static void bdi_update_bandwidth(struct backing_dev_info *bdi,
> unsigned long thresh,
> + unsigned long bg_thresh,
> unsigned long dirty,
> unsigned long bdi_thresh,
> unsigned long bdi_dirty,
> @@ -635,8 +836,8 @@ static void bdi_update_bandwidth(struct
> if (time_is_after_eq_jiffies(bdi->bw_time_stamp + BANDWIDTH_INTERVAL))
> return;
> spin_lock(&bdi->wb.list_lock);
> - __bdi_update_bandwidth(bdi, thresh, dirty, bdi_thresh, bdi_dirty,
> - start_time);
> + __bdi_update_bandwidth(bdi, thresh, bg_thresh, dirty,
> + bdi_thresh, bdi_dirty, start_time);
> spin_unlock(&bdi->wb.list_lock);
> }
>
> @@ -677,7 +878,8 @@ static void balance_dirty_pages(struct a
> * catch-up. This avoids (excessively) small writeouts
> * when the bdi limits are ramping up.
> */
> - if (nr_dirty <= (background_thresh + dirty_thresh) / 2)
> + if (nr_dirty <= dirty_freerun_ceiling(dirty_thresh,
> + background_thresh))
> break;
>
> bdi_thresh = bdi_dirty_limit(bdi, dirty_thresh);
> @@ -721,8 +923,9 @@ static void balance_dirty_pages(struct a
> if (!bdi->dirty_exceeded)
> bdi->dirty_exceeded = 1;
>
> - bdi_update_bandwidth(bdi, dirty_thresh, nr_dirty,
> - bdi_thresh, bdi_dirty, start_time);
> + bdi_update_bandwidth(bdi, dirty_thresh, background_thresh,
> + nr_dirty, bdi_thresh, bdi_dirty,
> + start_time);
>
> /* Note: nr_reclaimable denotes nr_dirty + nr_unstable.
> * Unstable writes are a feature of certain networked
> --- linux-next.orig/fs/fs-writeback.c 2011-08-26 15:57:18.000000000 +0800
> +++ linux-next/fs/fs-writeback.c 2011-08-26 15:57:20.000000000 +0800
> @@ -675,7 +675,7 @@ static inline bool over_bground_thresh(v
> static void wb_update_bandwidth(struct bdi_writeback *wb,
> unsigned long start_time)
> {
> - __bdi_update_bandwidth(wb->bdi, 0, 0, 0, 0, start_time);
> + __bdi_update_bandwidth(wb->bdi, 0, 0, 0, 0, 0, start_time);
> }
>
> /*
> --- linux-next.orig/include/linux/writeback.h 2011-08-26 15:57:18.000000000 +0800
> +++ linux-next/include/linux/writeback.h 2011-08-26 15:57:20.000000000 +0800
> @@ -141,6 +141,7 @@ unsigned long bdi_dirty_limit(struct bac
>
> void __bdi_update_bandwidth(struct backing_dev_info *bdi,
> unsigned long thresh,
> + unsigned long bg_thresh,
> unsigned long dirty,
> unsigned long bdi_thresh,
> unsigned long bdi_dirty,
All this function signature muck doesn't seem immediately relevant to
the introduction of bdi_position_ratio() since the new function isn't
actually used.
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next prev parent reply other threads:[~2011-09-05 15:06 UTC|newest]
Thread overview: 160+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-04 1:53 [PATCH 00/18] IO-less dirty throttling v11 Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 01/18] writeback: account per-bdi accumulated dirtied pages Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 02/18] writeback: dirty position control Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-05 15:02 ` Peter Zijlstra
2011-09-05 15:02 ` Peter Zijlstra
2011-09-06 2:10 ` Wu Fengguang
2011-09-06 2:10 ` Wu Fengguang
2011-09-05 15:05 ` Peter Zijlstra [this message]
2011-09-05 15:05 ` Peter Zijlstra
2011-09-06 2:43 ` Wu Fengguang
2011-09-06 2:43 ` Wu Fengguang
2011-09-06 18:20 ` Vivek Goyal
2011-09-06 18:20 ` Vivek Goyal
2011-09-08 2:53 ` Wu Fengguang
2011-09-08 2:53 ` Wu Fengguang
2011-11-12 5:44 ` Nai Xia
2011-11-12 5:44 ` Nai Xia
2011-09-04 1:53 ` [PATCH 03/18] writeback: dirty rate control Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-29 11:57 ` Wu Fengguang
2011-09-29 11:57 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 04/18] writeback: stabilize bdi->dirty_ratelimit Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 05/18] writeback: per task dirty rate limit Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-06 15:47 ` Peter Zijlstra
2011-09-06 15:47 ` Peter Zijlstra
2011-09-06 23:27 ` Jan Kara
2011-09-06 23:27 ` Jan Kara
2011-09-06 23:34 ` Jan Kara
2011-09-06 23:34 ` Jan Kara
2011-09-07 7:27 ` Peter Zijlstra
2011-09-07 7:27 ` Peter Zijlstra
2011-09-07 1:04 ` Wu Fengguang
2011-09-07 1:04 ` Wu Fengguang
2011-09-07 7:31 ` Peter Zijlstra
2011-09-07 7:31 ` Peter Zijlstra
2011-09-07 11:00 ` Wu Fengguang
2011-09-07 11:00 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 06/18] writeback: IO-less balance_dirty_pages() Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-06 12:13 ` Peter Zijlstra
2011-09-06 12:13 ` Peter Zijlstra
2011-09-07 2:46 ` Wu Fengguang
2011-09-07 2:46 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 07/18] writeback: dirty ratelimit - think time compensation Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 08/18] writeback: trace dirty_ratelimit Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 09/18] writeback: trace balance_dirty_pages Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 10/18] writeback: dirty position control - bdi reserve area Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-06 14:09 ` Peter Zijlstra
2011-09-06 14:09 ` Peter Zijlstra
2011-09-07 12:31 ` Wu Fengguang
2011-09-07 12:31 ` Wu Fengguang
2011-09-12 10:19 ` Peter Zijlstra
2011-09-12 10:19 ` Peter Zijlstra
2011-09-18 14:17 ` Wu Fengguang
2011-09-18 14:37 ` Wu Fengguang
2011-09-18 14:37 ` Wu Fengguang
2011-09-18 14:47 ` Wu Fengguang
2011-09-18 14:47 ` Wu Fengguang
2011-09-28 14:02 ` Wu Fengguang
2011-09-28 14:50 ` Peter Zijlstra
2011-09-28 14:50 ` Peter Zijlstra
2011-09-29 3:32 ` Wu Fengguang
2011-09-29 3:32 ` Wu Fengguang
2011-09-29 8:49 ` Peter Zijlstra
2011-09-29 8:49 ` Peter Zijlstra
2011-09-29 11:05 ` Wu Fengguang
2011-09-29 11:05 ` Wu Fengguang
2011-09-29 12:15 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 11/18] block: add bdi flag to indicate risk of io queue underrun Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-06 14:22 ` Peter Zijlstra
2011-09-06 14:22 ` Peter Zijlstra
2011-09-07 2:37 ` Wu Fengguang
2011-09-07 2:37 ` Wu Fengguang
2011-09-07 7:31 ` Peter Zijlstra
2011-09-07 7:31 ` Peter Zijlstra
2011-09-04 1:53 ` [PATCH 12/18] writeback: balanced_rate cannot exceed write bandwidth Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 13/18] writeback: limit max dirty pause time Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-06 14:52 ` Peter Zijlstra
2011-09-06 14:52 ` Peter Zijlstra
2011-09-07 2:35 ` Wu Fengguang
2011-09-07 2:35 ` Wu Fengguang
2011-09-12 10:22 ` Peter Zijlstra
2011-09-12 10:22 ` Peter Zijlstra
2011-09-18 14:23 ` Wu Fengguang
2011-09-18 14:23 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 14/18] writeback: control " Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-06 15:51 ` Peter Zijlstra
2011-09-06 15:51 ` Peter Zijlstra
2011-09-07 2:02 ` Wu Fengguang
2011-09-07 2:02 ` Wu Fengguang
2011-09-12 10:28 ` Peter Zijlstra
2011-09-12 10:28 ` Peter Zijlstra
2011-09-04 1:53 ` [PATCH 15/18] writeback: charge leaked page dirties to active tasks Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-06 16:16 ` Peter Zijlstra
2011-09-06 16:16 ` Peter Zijlstra
2011-09-07 9:06 ` Wu Fengguang
2011-09-07 9:06 ` Wu Fengguang
2011-09-07 0:17 ` Jan Kara
2011-09-07 0:17 ` Jan Kara
2011-09-07 9:37 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 16/18] writeback: fix dirtied pages accounting on sub-page writes Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` [PATCH 17/18] writeback: fix dirtied pages accounting on redirty Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-06 16:18 ` Peter Zijlstra
2011-09-06 16:18 ` Peter Zijlstra
2011-09-07 0:22 ` Jan Kara
2011-09-07 0:22 ` Jan Kara
2011-09-07 1:18 ` Wu Fengguang
2011-09-07 6:56 ` Christoph Hellwig
2011-09-07 6:56 ` Christoph Hellwig
2011-09-07 8:19 ` Peter Zijlstra
2011-09-07 8:19 ` Peter Zijlstra
2011-09-07 16:42 ` Jan Kara
2011-09-07 16:42 ` Jan Kara
2011-09-07 16:46 ` Christoph Hellwig
2011-09-07 16:46 ` Christoph Hellwig
2011-09-08 8:51 ` Steven Whitehouse
2011-09-08 8:51 ` Steven Whitehouse
2011-09-04 1:53 ` [PATCH 18/18] btrfs: fix dirtied pages accounting on sub-page writes Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-04 1:53 ` Wu Fengguang
2011-09-07 13:32 ` [PATCH 00/18] IO-less dirty throttling v11 Wu Fengguang
2011-09-07 13:32 ` Wu Fengguang
2011-09-07 19:14 ` Trond Myklebust
2011-09-07 19:14 ` Trond Myklebust
2011-09-28 14:58 ` Christoph Hellwig
2011-09-28 14:58 ` Christoph Hellwig
2011-09-29 4:11 ` Wu Fengguang
2011-09-29 4:11 ` Wu Fengguang
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