From: Wu Fengguang <fengguang.wu@intel.com>
To: Jan Kara <jack@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mel@linux.vnet.ibm.com>, Mel Gorman <mel@csn.ul.ie>,
Dave Chinner <david@fromorbit.com>,
Itaru Kitayama <kitayama@cl.bb4u.ne.jp>,
Minchan Kim <minchan.kim@gmail.com>,
Linux Memory Management List <linux-mm@kvack.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 6/6] writeback: refill b_io iff empty
Date: Fri, 6 May 2011 13:29:55 +0800 [thread overview]
Message-ID: <20110506052955.GA24904@localhost> (raw)
In-Reply-To: <20110505163708.GN5323@quack.suse.cz>
On Fri, May 06, 2011 at 12:37:08AM +0800, Jan Kara wrote:
> On Wed 04-05-11 15:39:31, Wu Fengguang wrote:
> > To help understand the behavior change, I wrote the writeback_queue_io
> > trace event, and found very different patterns between
> > - vanilla kernel
> > - this patchset plus the sync livelock fixes
> >
> > Basically the vanilla kernel each time pulls a random number of inodes
> > from b_dirty, while the patched kernel tends to pull a fixed number of
> > inodes (enqueue=1031) from b_dirty. The new behavior is very interesting...
> This regularity is really strange. Did you have a chance to look more into
> it? I find it highly unlikely that there would be exactly 1031 dirty inodes
> in b_dirty list every time you call move_expired_inodes()...
Jan, I got some results for ext4. The total dd+tar+sync time is
decreased from 177s to 167s. The other numbers are either raised or
dropped.
dd-tar-ext4-patched:elapsed: 177.4900000000016
dd-tar-ext4-patched:elapsed: 166.40000000000146
dd-tar-ext4-patched:elapsed: 164.33000000000175
dd-tar-ext4-patched:elapsed: 176.36999999999898
dd-tar-ext4-patched:elapsed: 152.84000000000015
avg 167.486
stddev 8.996
dd-tar-ext4-vanilla:elapsed: 172.08999999999924
dd-tar-ext4-vanilla:elapsed: 170.50999999999931
dd-tar-ext4-vanilla:elapsed: 183.61999999999989
dd-tar-ext4-vanilla:elapsed: 187.69999999999982
dd-tar-ext4-vanilla:elapsed: 174.8100000000004
avg 177.746
stddev 6.731
dd-tar-ext4-patched:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.66s system 9% cpu 16.922 total
dd-tar-ext4-patched:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.70s system 8% cpu 19.681 total
dd-tar-ext4-patched:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.69s system 8% cpu 19.041 total
dd-tar-ext4-patched:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.69s system 9% cpu 18.632 total
dd-tar-ext4-patched:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.70s system 9% cpu 18.478 total
avg 0.000 1.688 8.600 18.551
stddev 0.000 0.015 0.490 0.915
dd-tar-ext4-vanilla:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.67s system 8% cpu 19.658 total
dd-tar-ext4-vanilla:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.67s system 8% cpu 18.663 total
dd-tar-ext4-vanilla:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.70s system 8% cpu 19.970 total
dd-tar-ext4-vanilla:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.66s system 7% cpu 20.985 total
dd-tar-ext4-vanilla:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.66s system 8% cpu 19.806 total
avg 0.000 1.672 7.800 19.816
stddev 0.000 0.015 0.400 0.741
dd-tar-ext4-patched:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.08s user 3.51s system 71% cpu 21.677 total
dd-tar-ext4-patched:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.07s user 3.73s system 80% cpu 19.679 total
dd-tar-ext4-patched:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.43s user 3.09s system 79% cpu 19.444 total
dd-tar-ext4-patched:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.52s user 3.14s system 80% cpu 19.510 total
dd-tar-ext4-patched:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.38s user 3.15s system 92% cpu 16.701 total
avg 12.296 3.324 80.400 19.402
stddev 0.186 0.252 6.711 1.585
dd-tar-ext4-vanilla:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.34s user 3.26s system 96% cpu 16.155 total
dd-tar-ext4-vanilla:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.70s user 3.52s system 97% cpu 16.694 total
dd-tar-ext4-vanilla:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.47s user 3.31s system 92% cpu 17.017 total
dd-tar-ext4-vanilla:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.36s user 3.19s system 86% cpu 17.885 total
dd-tar-ext4-vanilla:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.46s user 3.17s system 101% cpu 15.382 total
avg 12.466 3.290 94.400 16.627
stddev 0.128 0.125 5.083 0.838
patched trace-tar-dd-ext4-2.6.39-rc3+
flush-8:0-3048 [000] 1902.672610: writeback_queue_io: bdi 8:0: older=4296543506 age=30000 enqueue=0
flush-8:0-3048 [000] 1905.209570: writeback_queue_io: bdi 8:0: older=4296546051 age=30000 enqueue=0
flush-8:0-3048 [000] 1907.294936: writeback_queue_io: bdi 8:0: older=4296548143 age=30000 enqueue=0
flush-8:0-3048 [004] 1909.607301: writeback_queue_io: bdi 8:0: older=4296550462 age=30000 enqueue=0
flush-8:0-3048 [003] 1912.290627: writeback_queue_io: bdi 8:0: older=4296553154 age=30000 enqueue=0
flush-8:0-3048 [001] 1914.331197: writeback_queue_io: bdi 8:0: older=4296555201 age=30000 enqueue=0
flush-0:15-2283 [002] 1924.729828: writeback_queue_io: bdi 0:15: older=4296565632 age=30000 enqueue=1
flush-8:0-3048 [000] 1927.275838: writeback_queue_io: bdi 8:0: older=4296568186 age=30000 enqueue=0
flush-8:0-3048 [000] 1927.277794: writeback_queue_io: bdi 8:0: older=4296568188 age=30000 enqueue=0
flush-8:0-3048 [000] 1927.279504: writeback_queue_io: bdi 8:0: older=4296568189 age=30000 enqueue=0
flush-8:0-3048 [000] 1927.279923: writeback_queue_io: bdi 8:0: older=4296568190 age=30000 enqueue=0
flush-0:15-2283 [002] 1929.714335: writeback_queue_io: bdi 0:15: older=4296570632 age=30000 enqueue=2
flush-0:15-2283 [002] 1929.979616: writeback_queue_io: bdi 0:15: older=4296600898 age=0 enqueue=10
flush-0:15-2283 [002] 1929.979675: writeback_queue_io: bdi 0:15: older=4296600898 age=0 enqueue=10
flush-8:0-3048 [004] 1929.981734: writeback_queue_io: bdi 8:0: older=4296600898 age=2 enqueue=13227
flush-8:0-3048 [000] 1932.840150: writeback_queue_io: bdi 8:0: older=4296600898 age=2869 enqueue=0
flush-8:0-3048 [000] 1932.840781: writeback_queue_io: bdi 8:0: older=4296603768 age=0 enqueue=0
flush-8:0-3048 [000] 1932.840787: writeback_queue_io: bdi 8:0: older=4296573768 age=30000 enqueue=0
flush-0:15-2283 [002] 1932.991221: writeback_queue_io: bdi 0:15: older=4296603919 age=0 enqueue=10
flush-0:15-2283 [002] 1932.991282: writeback_queue_io: bdi 0:15: older=4296603919 age=0 enqueue=0
flush-8:0-3048 [004] 1932.991596: writeback_queue_io: bdi 8:0: older=4296603919 age=0 enqueue=1
flush-8:0-3048 [004] 1937.975765: writeback_queue_io: bdi 8:0: older=4296578919 age=30000 enqueue=0
flush-8:0-3048 [004] 1942.960305: writeback_queue_io: bdi 8:0: older=4296583919 age=30000 enqueue=0
flush-8:0-3048 [004] 1947.944925: writeback_queue_io: bdi 8:0: older=4296588919 age=30000 enqueue=0
flush-8:0-3048 [004] 1952.929427: writeback_queue_io: bdi 8:0: older=4296593919 age=30000 enqueue=0
flush-8:0-3048 [004] 1957.914031: writeback_queue_io: bdi 8:0: older=4296598919 age=30000 enqueue=0
flush-8:0-3048 [004] 1962.898507: writeback_queue_io: bdi 8:0: older=4296603919 age=30000 enqueue=1
flush-8:0-3048 [004] 1962.898518: writeback_queue_io: bdi 8:0: older=4296603919 age=30000 enqueue=0
vanilla trace-tar-dd-ext4-2.6.39-rc3
flush-8:0-2911 [002] 53.756624: writeback_queue_io: bdi 8:0: older=4294690962 age=30000 enqueue=1
flush-8:0-2911 [002] 53.756738: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=1184
flush-0:15-2214 [001] 56.960369: writeback_queue_io: bdi 0:15: older=4294694176 age=30000 enqueue=0
flush-0:15-2214 [001] 56.960373: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-8:0-2911 [004] 57.447062: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=4479
flush-8:0-2911 [004] 57.482760: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=58
flush-8:0-2911 [004] 57.492041: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=12
flush-8:0-2911 [004] 57.613401: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=198
flush-8:0-2911 [004] 61.569241: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=229
flush-8:0-2911 [004] 61.589268: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=141
flush-8:0-2911 [004] 61.607471: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=209
flush-8:0-2911 [004] 61.619094: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [004] 61.629282: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-0:15-2214 [001] 61.945027: writeback_queue_io: bdi 0:15: older=4294699176 age=30000 enqueue=0
flush-0:15-2214 [001] 61.945032: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-8:0-2911 [001] 63.715007: writeback_queue_io: bdi 8:0: older=4294698964 age=31987 enqueue=0
flush-8:0-2911 [000] 66.469285: writeback_queue_io: bdi 8:0: older=4294698964 age=34750 enqueue=0
flush-0:15-2214 [005] 66.929422: writeback_queue_io: bdi 0:15: older=4294704176 age=30000 enqueue=0
flush-0:15-2214 [005] 66.929428: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-8:0-2911 [000] 68.377843: writeback_queue_io: bdi 8:0: older=4294698964 age=36664 enqueue=0
flush-0:15-2214 [005] 71.913983: writeback_queue_io: bdi 0:15: older=4294709176 age=30000 enqueue=1
flush-8:0-2911 [004] 74.365281: writeback_queue_io: bdi 8:0: older=4294711634 age=30000 enqueue=0
flush-8:0-2911 [000] 74.821770: writeback_queue_io: bdi 8:0: older=4294711634 age=30458 enqueue=0
flush-0:15-2214 [005] 76.898540: writeback_queue_io: bdi 0:15: older=4294714176 age=30000 enqueue=5
flush-8:0-2911 [004] 77.158312: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=18938
flush-8:0-2911 [004] 77.235169: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=185
flush-8:0-2911 [004] 77.388776: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=455
flush-8:0-2911 [004] 77.462484: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=187
flush-8:0-2911 [004] 77.541086: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=97
flush-8:0-2911 [004] 77.619482: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=126
flush-8:0-2911 [004] 77.810862: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=265
flush-8:0-2911 [006] 77.924553: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=209
flush-8:0-2911 [003] 78.034276: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=234
flush-8:0-2911 [003] 78.108989: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=148
flush-8:0-2911 [003] 78.179240: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=162
flush-8:0-2911 [003] 78.348585: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=406
flush-8:0-2911 [003] 78.476980: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=36
flush-8:0-2911 [003] 78.580621: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=144
flush-8:0-2911 [003] 78.754257: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=366
flush-8:0-2911 [003] 78.858451: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=184
flush-8:0-2911 [003] 78.945059: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=228
flush-8:0-2911 [003] 79.075494: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=267
flush-8:0-2911 [003] 79.152004: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=56
flush-8:0-2911 [003] 79.238366: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=145
flush-0:15-2214 [005] 81.883169: writeback_queue_io: bdi 0:15: older=4294719176 age=30000 enqueue=1
flush-0:15-2214 [005] 82.457961: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-0:15-2214 [005] 82.457985: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-8:0-2911 [000] 82.461064: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=6957
flush-8:0-2911 [000] 82.465738: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.084199: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.091283: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.097138: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.101489: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.105795: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.111433: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.113795: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.118674: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.123061: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.127796: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.318828: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.335335: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.513142: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.671440: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.727269: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.800181: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.827915: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.890632: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.930052: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.950224: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.980423: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.022254: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.140787: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.312729: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.379059: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.420117: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.473221: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.501959: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.589525: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.696628: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.699403: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.792484: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.920198: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 85.003982: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 85.006321: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 85.008473: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 85.009997: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 85.010003: writeback_queue_io: bdi 8:0: older=4294722312 age=30000 enqueue=0
flush-0:15-2214 [005] 85.245018: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-8:0-2911 [000] 85.245369: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=1
flush-8:0-2911 [000] 90.229292: writeback_queue_io: bdi 8:0: older=4294727548 age=30000 enqueue=0
flush-8:0-2911 [000] 95.213838: writeback_queue_io: bdi 8:0: older=4294732548 age=30000 enqueue=0
flush-0:15-2214 [005] 98.671161: writeback_queue_io: bdi 0:15: older=4294736016 age=30000 enqueue=0
flush-8:0-2911 [000] 100.198391: writeback_queue_io: bdi 8:0: older=4294737548 age=30000 enqueue=0
flush-0:15-2214 [005] 103.655662: writeback_queue_io: bdi 0:15: older=4294741016 age=30000 enqueue=0
flush-8:0-2911 [000] 105.182941: writeback_queue_io: bdi 8:0: older=4294742548 age=30000 enqueue=1
flush-0:15-2214 [005] 108.640284: writeback_queue_io: bdi 0:15: older=4294746016 age=30000 enqueue=0
flush-0:15-2214 [005] 113.624829: writeback_queue_io: bdi 0:15: older=4294751016 age=30000 enqueue=0
flush-0:15-2214 [005] 118.609396: writeback_queue_io: bdi 0:15: older=4294756016 age=30000 enqueue=0
flush-0:15-2214 [005] 123.593932: writeback_queue_io: bdi 0:15: older=4294761016 age=30000 enqueue=1
flush-0:15-2214 [005] 128.578494: writeback_queue_io: bdi 0:15: older=4294766016 age=30000 enqueue=0
flush-0:15-2214 [005] 133.563026: writeback_queue_io: bdi 0:15: older=4294771016 age=30000 enqueue=0
flush-0:15-2214 [005] 138.547592: writeback_queue_io: bdi 0:15: older=4294776016 age=30000 enqueue=0
flush-0:15-2214 [005] 143.532126: writeback_queue_io: bdi 0:15: older=4294781016 age=30000 enqueue=0
flush-0:15-2214 [005] 148.516696: writeback_queue_io: bdi 0:15: older=4294786016 age=30000 enqueue=2
flush-0:15-2214 [005] 153.501234: writeback_queue_io: bdi 0:15: older=4294791016 age=30000 enqueue=1
flush-0:15-2214 [005] 158.485800: writeback_queue_io: bdi 0:15: older=4294796016 age=30000 enqueue=0
flush-0:15-2214 [005] 163.470348: writeback_queue_io: bdi 0:15: older=4294801016 age=30000 enqueue=0
flush-0:15-2214 [005] 168.454905: writeback_queue_io: bdi 0:15: older=4294806016 age=30000 enqueue=0
flush-0:15-2214 [005] 173.439445: writeback_queue_io: bdi 0:15: older=4294811016 age=30000 enqueue=0
flush-0:15-2214 [005] 178.424001: writeback_queue_io: bdi 0:15: older=4294816016 age=30000 enqueue=2
flush-0:15-2214 [005] 183.408546: writeback_queue_io: bdi 0:15: older=4294821016 age=30000 enqueue=1
flush-0:15-2214 [005] 188.393102: writeback_queue_io: bdi 0:15: older=4294826016 age=30000 enqueue=0
flush-0:15-2214 [005] 193.377653: writeback_queue_io: bdi 0:15: older=4294831016 age=30000 enqueue=0
flush-0:15-2214 [005] 198.362203: writeback_queue_io: bdi 0:15: older=4294836016 age=30000 enqueue=0
flush-0:15-2214 [005] 203.346749: writeback_queue_io: bdi 0:15: older=4294841016 age=30000 enqueue=0
flush-0:15-2214 [005] 208.331306: writeback_queue_io: bdi 0:15: older=4294846016 age=30000 enqueue=2
flush-0:15-2214 [005] 213.315844: writeback_queue_io: bdi 0:15: older=4294851016 age=30000 enqueue=1
flush-0:15-2214 [005] 218.300404: writeback_queue_io: bdi 0:15: older=4294856016 age=30000 enqueue=0
flush-0:15-2214 [005] 223.284955: writeback_queue_io: bdi 0:15: older=4294861016 age=30000 enqueue=0
flush-0:15-2214 [005] 228.269515: writeback_queue_io: bdi 0:15: older=4294866016 age=30000 enqueue=0
flush-0:15-2214 [005] 233.254057: writeback_queue_io: bdi 0:15: older=4294871016 age=30000 enqueue=0
flush-0:15-2214 [005] 238.238619: writeback_queue_io: bdi 0:15: older=4294876016 age=30000 enqueue=2
flush-0:15-2214 [005] 243.223157: writeback_queue_io: bdi 0:15: older=4294881016 age=30000 enqueue=1
flush-0:15-2214 [005] 248.207715: writeback_queue_io: bdi 0:15: older=4294886016 age=30000 enqueue=0
flush-0:15-2214 [005] 253.192251: writeback_queue_io: bdi 0:15: older=4294891016 age=30000 enqueue=0
flush-0:15-2214 [005] 258.176824: writeback_queue_io: bdi 0:15: older=4294896016 age=30000 enqueue=0
flush-0:15-2214 [005] 263.161348: writeback_queue_io: bdi 0:15: older=4294901016 age=30000 enqueue=0
flush-0:15-2214 [005] 268.145922: writeback_queue_io: bdi 0:15: older=4294906016 age=30000 enqueue=2
flush-0:15-2214 [005] 273.130463: writeback_queue_io: bdi 0:15: older=4294911016 age=30000 enqueue=1
flush-0:15-2214 [005] 278.115008: writeback_queue_io: bdi 0:15: older=4294916016 age=30000 enqueue=0
flush-0:15-2214 [005] 283.099572: writeback_queue_io: bdi 0:15: older=4294921016 age=30000 enqueue=0
flush-0:15-2214 [005] 288.084050: writeback_queue_io: bdi 0:15: older=4294926016 age=30000 enqueue=0
flush-0:15-2214 [005] 293.068668: writeback_queue_io: bdi 0:15: older=4294931016 age=30000 enqueue=0
flush-0:15-2214 [005] 298.053228: writeback_queue_io: bdi 0:15: older=4294936016 age=30000 enqueue=2
flush-0:15-2214 [005] 303.037756: writeback_queue_io: bdi 0:15: older=4294941016 age=30000 enqueue=1
flush-0:15-2214 [005] 308.022329: writeback_queue_io: bdi 0:15: older=4294946016 age=30000 enqueue=0
flush-0:15-2214 [005] 313.006864: writeback_queue_io: bdi 0:15: older=4294951016 age=30000 enqueue=0
flush-0:15-2214 [005] 317.991431: writeback_queue_io: bdi 0:15: older=4294956016 age=30000 enqueue=0
flush-0:15-2214 [005] 322.975973: writeback_queue_io: bdi 0:15: older=4294961016 age=30000 enqueue=0
flush-0:15-2214 [005] 327.960530: writeback_queue_io: bdi 0:15: older=4294966016 age=30000 enqueue=2
flush-0:15-2214 [005] 332.945074: writeback_queue_io: bdi 0:15: older=4294971016 age=30000 enqueue=1
flush-0:15-2214 [005] 337.929629: writeback_queue_io: bdi 0:15: older=4294976016 age=30000 enqueue=0
flush-0:15-2214 [005] 342.914183: writeback_queue_io: bdi 0:15: older=4294981016 age=30000 enqueue=0
flush-0:15-2214 [005] 347.898736: writeback_queue_io: bdi 0:15: older=4294986016 age=30000 enqueue=0
flush-0:15-2214 [005] 352.883285: writeback_queue_io: bdi 0:15: older=4294991016 age=30000 enqueue=0
flush-0:15-2214 [005] 357.867829: writeback_queue_io: bdi 0:15: older=4294996016 age=30000 enqueue=2
flush-0:15-2214 [005] 362.852371: writeback_queue_io: bdi 0:15: older=4295001016 age=30000 enqueue=1
flush-0:15-2214 [005] 367.836939: writeback_queue_io: bdi 0:15: older=4295006016 age=30000 enqueue=0
flush-0:15-2214 [005] 372.821491: writeback_queue_io: bdi 0:15: older=4295011016 age=30000 enqueue=0
flush-0:15-2214 [005] 377.806047: writeback_queue_io: bdi 0:15: older=4295016016 age=30000 enqueue=0
flush-0:15-2214 [005] 382.790584: writeback_queue_io: bdi 0:15: older=4295021016 age=30000 enqueue=0
flush-0:15-2214 [005] 387.775142: writeback_queue_io: bdi 0:15: older=4295026016 age=30000 enqueue=2
flush-0:15-2214 [005] 392.759681: writeback_queue_io: bdi 0:15: older=4295031016 age=30000 enqueue=1
flush-0:15-2214 [005] 397.744251: writeback_queue_io: bdi 0:15: older=4295036016 age=30000 enqueue=0
flush-0:15-2214 [005] 402.728786: writeback_queue_io: bdi 0:15: older=4295041016 age=30000 enqueue=0
flush-0:15-2214 [005] 407.713347: writeback_queue_io: bdi 0:15: older=4295046016 age=30000 enqueue=0
flush-0:15-2214 [005] 412.697887: writeback_queue_io: bdi 0:15: older=4295051016 age=30000 enqueue=0
flush-0:15-2214 [005] 417.682447: writeback_queue_io: bdi 0:15: older=4295056016 age=30000 enqueue=2
flush-0:15-2214 [005] 422.666987: writeback_queue_io: bdi 0:15: older=4295061016 age=30000 enqueue=1
flush-0:15-2214 [005] 427.651550: writeback_queue_io: bdi 0:15: older=4295066016 age=30000 enqueue=0
flush-0:15-2214 [005] 432.636088: writeback_queue_io: bdi 0:15: older=4295071016 age=30000 enqueue=0
flush-0:15-2214 [005] 437.620649: writeback_queue_io: bdi 0:15: older=4295076016 age=30000 enqueue=0
flush-0:15-2214 [005] 442.605199: writeback_queue_io: bdi 0:15: older=4295081016 age=30000 enqueue=0
flush-0:15-2214 [005] 447.589750: writeback_queue_io: bdi 0:15: older=4295086016 age=30000 enqueue=2
flush-0:15-2214 [005] 452.574296: writeback_queue_io: bdi 0:15: older=4295091016 age=30000 enqueue=1
flush-0:15-2214 [005] 457.558861: writeback_queue_io: bdi 0:15: older=4295096016 age=30000 enqueue=0
flush-0:15-2214 [005] 462.543399: writeback_queue_io: bdi 0:15: older=4295101016 age=30000 enqueue=0
flush-0:15-2214 [005] 467.527961: writeback_queue_io: bdi 0:15: older=4295106016 age=30000 enqueue=0
flush-0:15-2214 [005] 472.512492: writeback_queue_io: bdi 0:15: older=4295111016 age=30000 enqueue=0
flush-0:15-2214 [005] 477.497055: writeback_queue_io: bdi 0:15: older=4295116016 age=30000 enqueue=2
flush-0:15-2214 [005] 482.481630: writeback_queue_io: bdi 0:15: older=4295121016 age=30000 enqueue=1
flush-0:15-2214 [005] 487.466162: writeback_queue_io: bdi 0:15: older=4295126016 age=30000 enqueue=0
flush-0:15-2214 [005] 492.450709: writeback_queue_io: bdi 0:15: older=4295131016 age=30000 enqueue=0
flush-0:15-2214 [005] 497.435268: writeback_queue_io: bdi 0:15: older=4295136016 age=30000 enqueue=0
flush-0:15-2214 [005] 502.419812: writeback_queue_io: bdi 0:15: older=4295141016 age=30000 enqueue=0
flush-0:15-2214 [005] 507.404385: writeback_queue_io: bdi 0:15: older=4295146016 age=30000 enqueue=2
flush-0:15-2214 [005] 512.388906: writeback_queue_io: bdi 0:15: older=4295151016 age=30000 enqueue=1
flush-0:15-2214 [005] 517.373458: writeback_queue_io: bdi 0:15: older=4295156016 age=30000 enqueue=0
flush-0:15-2214 [005] 522.358005: writeback_queue_io: bdi 0:15: older=4295161016 age=30000 enqueue=0
flush-0:15-2214 [005] 527.342587: writeback_queue_io: bdi 0:15: older=4295166016 age=30000 enqueue=0
flush-0:15-2214 [005] 532.327116: writeback_queue_io: bdi 0:15: older=4295171016 age=30000 enqueue=0
Thanks,
Fengguang
WARNING: multiple messages have this Message-ID (diff)
From: Wu Fengguang <fengguang.wu@intel.com>
To: Jan Kara <jack@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mel@linux.vnet.ibm.com>, Mel Gorman <mel@csn.ul.ie>,
Dave Chinner <david@fromorbit.com>,
Itaru Kitayama <kitayama@cl.bb4u.ne.jp>,
Minchan Kim <minchan.kim@gmail.com>,
Linux Memory Management List <linux-mm@kvack.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 6/6] writeback: refill b_io iff empty
Date: Fri, 6 May 2011 13:29:55 +0800 [thread overview]
Message-ID: <20110506052955.GA24904@localhost> (raw)
In-Reply-To: <20110505163708.GN5323@quack.suse.cz>
On Fri, May 06, 2011 at 12:37:08AM +0800, Jan Kara wrote:
> On Wed 04-05-11 15:39:31, Wu Fengguang wrote:
> > To help understand the behavior change, I wrote the writeback_queue_io
> > trace event, and found very different patterns between
> > - vanilla kernel
> > - this patchset plus the sync livelock fixes
> >
> > Basically the vanilla kernel each time pulls a random number of inodes
> > from b_dirty, while the patched kernel tends to pull a fixed number of
> > inodes (enqueue=1031) from b_dirty. The new behavior is very interesting...
> This regularity is really strange. Did you have a chance to look more into
> it? I find it highly unlikely that there would be exactly 1031 dirty inodes
> in b_dirty list every time you call move_expired_inodes()...
Jan, I got some results for ext4. The total dd+tar+sync time is
decreased from 177s to 167s. The other numbers are either raised or
dropped.
dd-tar-ext4-patched:elapsed: 177.4900000000016
dd-tar-ext4-patched:elapsed: 166.40000000000146
dd-tar-ext4-patched:elapsed: 164.33000000000175
dd-tar-ext4-patched:elapsed: 176.36999999999898
dd-tar-ext4-patched:elapsed: 152.84000000000015
avg 167.486
stddev 8.996
dd-tar-ext4-vanilla:elapsed: 172.08999999999924
dd-tar-ext4-vanilla:elapsed: 170.50999999999931
dd-tar-ext4-vanilla:elapsed: 183.61999999999989
dd-tar-ext4-vanilla:elapsed: 187.69999999999982
dd-tar-ext4-vanilla:elapsed: 174.8100000000004
avg 177.746
stddev 6.731
dd-tar-ext4-patched:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.66s system 9% cpu 16.922 total
dd-tar-ext4-patched:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.70s system 8% cpu 19.681 total
dd-tar-ext4-patched:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.69s system 8% cpu 19.041 total
dd-tar-ext4-patched:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.69s system 9% cpu 18.632 total
dd-tar-ext4-patched:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.70s system 9% cpu 18.478 total
avg 0.000 1.688 8.600 18.551
stddev 0.000 0.015 0.490 0.915
dd-tar-ext4-vanilla:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.67s system 8% cpu 19.658 total
dd-tar-ext4-vanilla:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.67s system 8% cpu 18.663 total
dd-tar-ext4-vanilla:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.70s system 8% cpu 19.970 total
dd-tar-ext4-vanilla:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.66s system 7% cpu 20.985 total
dd-tar-ext4-vanilla:dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.66s system 8% cpu 19.806 total
avg 0.000 1.672 7.800 19.816
stddev 0.000 0.015 0.400 0.741
dd-tar-ext4-patched:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.08s user 3.51s system 71% cpu 21.677 total
dd-tar-ext4-patched:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.07s user 3.73s system 80% cpu 19.679 total
dd-tar-ext4-patched:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.43s user 3.09s system 79% cpu 19.444 total
dd-tar-ext4-patched:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.52s user 3.14s system 80% cpu 19.510 total
dd-tar-ext4-patched:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.38s user 3.15s system 92% cpu 16.701 total
avg 12.296 3.324 80.400 19.402
stddev 0.186 0.252 6.711 1.585
dd-tar-ext4-vanilla:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.34s user 3.26s system 96% cpu 16.155 total
dd-tar-ext4-vanilla:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.70s user 3.52s system 97% cpu 16.694 total
dd-tar-ext4-vanilla:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.47s user 3.31s system 92% cpu 17.017 total
dd-tar-ext4-vanilla:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.36s user 3.19s system 86% cpu 17.885 total
dd-tar-ext4-vanilla:tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.46s user 3.17s system 101% cpu 15.382 total
avg 12.466 3.290 94.400 16.627
stddev 0.128 0.125 5.083 0.838
patched trace-tar-dd-ext4-2.6.39-rc3+
flush-8:0-3048 [000] 1902.672610: writeback_queue_io: bdi 8:0: older=4296543506 age=30000 enqueue=0
flush-8:0-3048 [000] 1905.209570: writeback_queue_io: bdi 8:0: older=4296546051 age=30000 enqueue=0
flush-8:0-3048 [000] 1907.294936: writeback_queue_io: bdi 8:0: older=4296548143 age=30000 enqueue=0
flush-8:0-3048 [004] 1909.607301: writeback_queue_io: bdi 8:0: older=4296550462 age=30000 enqueue=0
flush-8:0-3048 [003] 1912.290627: writeback_queue_io: bdi 8:0: older=4296553154 age=30000 enqueue=0
flush-8:0-3048 [001] 1914.331197: writeback_queue_io: bdi 8:0: older=4296555201 age=30000 enqueue=0
flush-0:15-2283 [002] 1924.729828: writeback_queue_io: bdi 0:15: older=4296565632 age=30000 enqueue=1
flush-8:0-3048 [000] 1927.275838: writeback_queue_io: bdi 8:0: older=4296568186 age=30000 enqueue=0
flush-8:0-3048 [000] 1927.277794: writeback_queue_io: bdi 8:0: older=4296568188 age=30000 enqueue=0
flush-8:0-3048 [000] 1927.279504: writeback_queue_io: bdi 8:0: older=4296568189 age=30000 enqueue=0
flush-8:0-3048 [000] 1927.279923: writeback_queue_io: bdi 8:0: older=4296568190 age=30000 enqueue=0
flush-0:15-2283 [002] 1929.714335: writeback_queue_io: bdi 0:15: older=4296570632 age=30000 enqueue=2
flush-0:15-2283 [002] 1929.979616: writeback_queue_io: bdi 0:15: older=4296600898 age=0 enqueue=10
flush-0:15-2283 [002] 1929.979675: writeback_queue_io: bdi 0:15: older=4296600898 age=0 enqueue=10
flush-8:0-3048 [004] 1929.981734: writeback_queue_io: bdi 8:0: older=4296600898 age=2 enqueue=13227
flush-8:0-3048 [000] 1932.840150: writeback_queue_io: bdi 8:0: older=4296600898 age=2869 enqueue=0
flush-8:0-3048 [000] 1932.840781: writeback_queue_io: bdi 8:0: older=4296603768 age=0 enqueue=0
flush-8:0-3048 [000] 1932.840787: writeback_queue_io: bdi 8:0: older=4296573768 age=30000 enqueue=0
flush-0:15-2283 [002] 1932.991221: writeback_queue_io: bdi 0:15: older=4296603919 age=0 enqueue=10
flush-0:15-2283 [002] 1932.991282: writeback_queue_io: bdi 0:15: older=4296603919 age=0 enqueue=0
flush-8:0-3048 [004] 1932.991596: writeback_queue_io: bdi 8:0: older=4296603919 age=0 enqueue=1
flush-8:0-3048 [004] 1937.975765: writeback_queue_io: bdi 8:0: older=4296578919 age=30000 enqueue=0
flush-8:0-3048 [004] 1942.960305: writeback_queue_io: bdi 8:0: older=4296583919 age=30000 enqueue=0
flush-8:0-3048 [004] 1947.944925: writeback_queue_io: bdi 8:0: older=4296588919 age=30000 enqueue=0
flush-8:0-3048 [004] 1952.929427: writeback_queue_io: bdi 8:0: older=4296593919 age=30000 enqueue=0
flush-8:0-3048 [004] 1957.914031: writeback_queue_io: bdi 8:0: older=4296598919 age=30000 enqueue=0
flush-8:0-3048 [004] 1962.898507: writeback_queue_io: bdi 8:0: older=4296603919 age=30000 enqueue=1
flush-8:0-3048 [004] 1962.898518: writeback_queue_io: bdi 8:0: older=4296603919 age=30000 enqueue=0
vanilla trace-tar-dd-ext4-2.6.39-rc3
flush-8:0-2911 [002] 53.756624: writeback_queue_io: bdi 8:0: older=4294690962 age=30000 enqueue=1
flush-8:0-2911 [002] 53.756738: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=1184
flush-0:15-2214 [001] 56.960369: writeback_queue_io: bdi 0:15: older=4294694176 age=30000 enqueue=0
flush-0:15-2214 [001] 56.960373: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-8:0-2911 [004] 57.447062: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=4479
flush-8:0-2911 [004] 57.482760: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=58
flush-8:0-2911 [004] 57.492041: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=12
flush-8:0-2911 [004] 57.613401: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=198
flush-8:0-2911 [004] 61.569241: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=229
flush-8:0-2911 [004] 61.589268: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=141
flush-8:0-2911 [004] 61.607471: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=209
flush-8:0-2911 [004] 61.619094: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [004] 61.629282: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-0:15-2214 [001] 61.945027: writeback_queue_io: bdi 0:15: older=4294699176 age=30000 enqueue=0
flush-0:15-2214 [001] 61.945032: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-8:0-2911 [001] 63.715007: writeback_queue_io: bdi 8:0: older=4294698964 age=31987 enqueue=0
flush-8:0-2911 [000] 66.469285: writeback_queue_io: bdi 8:0: older=4294698964 age=34750 enqueue=0
flush-0:15-2214 [005] 66.929422: writeback_queue_io: bdi 0:15: older=4294704176 age=30000 enqueue=0
flush-0:15-2214 [005] 66.929428: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-8:0-2911 [000] 68.377843: writeback_queue_io: bdi 8:0: older=4294698964 age=36664 enqueue=0
flush-0:15-2214 [005] 71.913983: writeback_queue_io: bdi 0:15: older=4294709176 age=30000 enqueue=1
flush-8:0-2911 [004] 74.365281: writeback_queue_io: bdi 8:0: older=4294711634 age=30000 enqueue=0
flush-8:0-2911 [000] 74.821770: writeback_queue_io: bdi 8:0: older=4294711634 age=30458 enqueue=0
flush-0:15-2214 [005] 76.898540: writeback_queue_io: bdi 0:15: older=4294714176 age=30000 enqueue=5
flush-8:0-2911 [004] 77.158312: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=18938
flush-8:0-2911 [004] 77.235169: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=185
flush-8:0-2911 [004] 77.388776: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=455
flush-8:0-2911 [004] 77.462484: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=187
flush-8:0-2911 [004] 77.541086: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=97
flush-8:0-2911 [004] 77.619482: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=126
flush-8:0-2911 [004] 77.810862: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=265
flush-8:0-2911 [006] 77.924553: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=209
flush-8:0-2911 [003] 78.034276: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=234
flush-8:0-2911 [003] 78.108989: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=148
flush-8:0-2911 [003] 78.179240: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=162
flush-8:0-2911 [003] 78.348585: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=406
flush-8:0-2911 [003] 78.476980: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=36
flush-8:0-2911 [003] 78.580621: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=144
flush-8:0-2911 [003] 78.754257: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=366
flush-8:0-2911 [003] 78.858451: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=184
flush-8:0-2911 [003] 78.945059: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=228
flush-8:0-2911 [003] 79.075494: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=267
flush-8:0-2911 [003] 79.152004: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=56
flush-8:0-2911 [003] 79.238366: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=145
flush-0:15-2214 [005] 81.883169: writeback_queue_io: bdi 0:15: older=4294719176 age=30000 enqueue=1
flush-0:15-2214 [005] 82.457961: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-0:15-2214 [005] 82.457985: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-8:0-2911 [000] 82.461064: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=6957
flush-8:0-2911 [000] 82.465738: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.084199: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.091283: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.097138: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.101489: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.105795: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.111433: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.113795: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.118674: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.123061: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.127796: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.318828: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.335335: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.513142: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.671440: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.727269: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.800181: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.827915: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.890632: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.930052: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.950224: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 83.980423: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.022254: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.140787: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.312729: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.379059: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.420117: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.473221: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.501959: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.589525: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.696628: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.699403: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.792484: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 84.920198: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 85.003982: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 85.006321: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 85.008473: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 85.009997: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=0
flush-8:0-2911 [000] 85.010003: writeback_queue_io: bdi 8:0: older=4294722312 age=30000 enqueue=0
flush-0:15-2214 [005] 85.245018: writeback_queue_io: bdi 0:15: older=0 age=-1 enqueue=7
flush-8:0-2911 [000] 85.245369: writeback_queue_io: bdi 8:0: older=0 age=-1 enqueue=1
flush-8:0-2911 [000] 90.229292: writeback_queue_io: bdi 8:0: older=4294727548 age=30000 enqueue=0
flush-8:0-2911 [000] 95.213838: writeback_queue_io: bdi 8:0: older=4294732548 age=30000 enqueue=0
flush-0:15-2214 [005] 98.671161: writeback_queue_io: bdi 0:15: older=4294736016 age=30000 enqueue=0
flush-8:0-2911 [000] 100.198391: writeback_queue_io: bdi 8:0: older=4294737548 age=30000 enqueue=0
flush-0:15-2214 [005] 103.655662: writeback_queue_io: bdi 0:15: older=4294741016 age=30000 enqueue=0
flush-8:0-2911 [000] 105.182941: writeback_queue_io: bdi 8:0: older=4294742548 age=30000 enqueue=1
flush-0:15-2214 [005] 108.640284: writeback_queue_io: bdi 0:15: older=4294746016 age=30000 enqueue=0
flush-0:15-2214 [005] 113.624829: writeback_queue_io: bdi 0:15: older=4294751016 age=30000 enqueue=0
flush-0:15-2214 [005] 118.609396: writeback_queue_io: bdi 0:15: older=4294756016 age=30000 enqueue=0
flush-0:15-2214 [005] 123.593932: writeback_queue_io: bdi 0:15: older=4294761016 age=30000 enqueue=1
flush-0:15-2214 [005] 128.578494: writeback_queue_io: bdi 0:15: older=4294766016 age=30000 enqueue=0
flush-0:15-2214 [005] 133.563026: writeback_queue_io: bdi 0:15: older=4294771016 age=30000 enqueue=0
flush-0:15-2214 [005] 138.547592: writeback_queue_io: bdi 0:15: older=4294776016 age=30000 enqueue=0
flush-0:15-2214 [005] 143.532126: writeback_queue_io: bdi 0:15: older=4294781016 age=30000 enqueue=0
flush-0:15-2214 [005] 148.516696: writeback_queue_io: bdi 0:15: older=4294786016 age=30000 enqueue=2
flush-0:15-2214 [005] 153.501234: writeback_queue_io: bdi 0:15: older=4294791016 age=30000 enqueue=1
flush-0:15-2214 [005] 158.485800: writeback_queue_io: bdi 0:15: older=4294796016 age=30000 enqueue=0
flush-0:15-2214 [005] 163.470348: writeback_queue_io: bdi 0:15: older=4294801016 age=30000 enqueue=0
flush-0:15-2214 [005] 168.454905: writeback_queue_io: bdi 0:15: older=4294806016 age=30000 enqueue=0
flush-0:15-2214 [005] 173.439445: writeback_queue_io: bdi 0:15: older=4294811016 age=30000 enqueue=0
flush-0:15-2214 [005] 178.424001: writeback_queue_io: bdi 0:15: older=4294816016 age=30000 enqueue=2
flush-0:15-2214 [005] 183.408546: writeback_queue_io: bdi 0:15: older=4294821016 age=30000 enqueue=1
flush-0:15-2214 [005] 188.393102: writeback_queue_io: bdi 0:15: older=4294826016 age=30000 enqueue=0
flush-0:15-2214 [005] 193.377653: writeback_queue_io: bdi 0:15: older=4294831016 age=30000 enqueue=0
flush-0:15-2214 [005] 198.362203: writeback_queue_io: bdi 0:15: older=4294836016 age=30000 enqueue=0
flush-0:15-2214 [005] 203.346749: writeback_queue_io: bdi 0:15: older=4294841016 age=30000 enqueue=0
flush-0:15-2214 [005] 208.331306: writeback_queue_io: bdi 0:15: older=4294846016 age=30000 enqueue=2
flush-0:15-2214 [005] 213.315844: writeback_queue_io: bdi 0:15: older=4294851016 age=30000 enqueue=1
flush-0:15-2214 [005] 218.300404: writeback_queue_io: bdi 0:15: older=4294856016 age=30000 enqueue=0
flush-0:15-2214 [005] 223.284955: writeback_queue_io: bdi 0:15: older=4294861016 age=30000 enqueue=0
flush-0:15-2214 [005] 228.269515: writeback_queue_io: bdi 0:15: older=4294866016 age=30000 enqueue=0
flush-0:15-2214 [005] 233.254057: writeback_queue_io: bdi 0:15: older=4294871016 age=30000 enqueue=0
flush-0:15-2214 [005] 238.238619: writeback_queue_io: bdi 0:15: older=4294876016 age=30000 enqueue=2
flush-0:15-2214 [005] 243.223157: writeback_queue_io: bdi 0:15: older=4294881016 age=30000 enqueue=1
flush-0:15-2214 [005] 248.207715: writeback_queue_io: bdi 0:15: older=4294886016 age=30000 enqueue=0
flush-0:15-2214 [005] 253.192251: writeback_queue_io: bdi 0:15: older=4294891016 age=30000 enqueue=0
flush-0:15-2214 [005] 258.176824: writeback_queue_io: bdi 0:15: older=4294896016 age=30000 enqueue=0
flush-0:15-2214 [005] 263.161348: writeback_queue_io: bdi 0:15: older=4294901016 age=30000 enqueue=0
flush-0:15-2214 [005] 268.145922: writeback_queue_io: bdi 0:15: older=4294906016 age=30000 enqueue=2
flush-0:15-2214 [005] 273.130463: writeback_queue_io: bdi 0:15: older=4294911016 age=30000 enqueue=1
flush-0:15-2214 [005] 278.115008: writeback_queue_io: bdi 0:15: older=4294916016 age=30000 enqueue=0
flush-0:15-2214 [005] 283.099572: writeback_queue_io: bdi 0:15: older=4294921016 age=30000 enqueue=0
flush-0:15-2214 [005] 288.084050: writeback_queue_io: bdi 0:15: older=4294926016 age=30000 enqueue=0
flush-0:15-2214 [005] 293.068668: writeback_queue_io: bdi 0:15: older=4294931016 age=30000 enqueue=0
flush-0:15-2214 [005] 298.053228: writeback_queue_io: bdi 0:15: older=4294936016 age=30000 enqueue=2
flush-0:15-2214 [005] 303.037756: writeback_queue_io: bdi 0:15: older=4294941016 age=30000 enqueue=1
flush-0:15-2214 [005] 308.022329: writeback_queue_io: bdi 0:15: older=4294946016 age=30000 enqueue=0
flush-0:15-2214 [005] 313.006864: writeback_queue_io: bdi 0:15: older=4294951016 age=30000 enqueue=0
flush-0:15-2214 [005] 317.991431: writeback_queue_io: bdi 0:15: older=4294956016 age=30000 enqueue=0
flush-0:15-2214 [005] 322.975973: writeback_queue_io: bdi 0:15: older=4294961016 age=30000 enqueue=0
flush-0:15-2214 [005] 327.960530: writeback_queue_io: bdi 0:15: older=4294966016 age=30000 enqueue=2
flush-0:15-2214 [005] 332.945074: writeback_queue_io: bdi 0:15: older=4294971016 age=30000 enqueue=1
flush-0:15-2214 [005] 337.929629: writeback_queue_io: bdi 0:15: older=4294976016 age=30000 enqueue=0
flush-0:15-2214 [005] 342.914183: writeback_queue_io: bdi 0:15: older=4294981016 age=30000 enqueue=0
flush-0:15-2214 [005] 347.898736: writeback_queue_io: bdi 0:15: older=4294986016 age=30000 enqueue=0
flush-0:15-2214 [005] 352.883285: writeback_queue_io: bdi 0:15: older=4294991016 age=30000 enqueue=0
flush-0:15-2214 [005] 357.867829: writeback_queue_io: bdi 0:15: older=4294996016 age=30000 enqueue=2
flush-0:15-2214 [005] 362.852371: writeback_queue_io: bdi 0:15: older=4295001016 age=30000 enqueue=1
flush-0:15-2214 [005] 367.836939: writeback_queue_io: bdi 0:15: older=4295006016 age=30000 enqueue=0
flush-0:15-2214 [005] 372.821491: writeback_queue_io: bdi 0:15: older=4295011016 age=30000 enqueue=0
flush-0:15-2214 [005] 377.806047: writeback_queue_io: bdi 0:15: older=4295016016 age=30000 enqueue=0
flush-0:15-2214 [005] 382.790584: writeback_queue_io: bdi 0:15: older=4295021016 age=30000 enqueue=0
flush-0:15-2214 [005] 387.775142: writeback_queue_io: bdi 0:15: older=4295026016 age=30000 enqueue=2
flush-0:15-2214 [005] 392.759681: writeback_queue_io: bdi 0:15: older=4295031016 age=30000 enqueue=1
flush-0:15-2214 [005] 397.744251: writeback_queue_io: bdi 0:15: older=4295036016 age=30000 enqueue=0
flush-0:15-2214 [005] 402.728786: writeback_queue_io: bdi 0:15: older=4295041016 age=30000 enqueue=0
flush-0:15-2214 [005] 407.713347: writeback_queue_io: bdi 0:15: older=4295046016 age=30000 enqueue=0
flush-0:15-2214 [005] 412.697887: writeback_queue_io: bdi 0:15: older=4295051016 age=30000 enqueue=0
flush-0:15-2214 [005] 417.682447: writeback_queue_io: bdi 0:15: older=4295056016 age=30000 enqueue=2
flush-0:15-2214 [005] 422.666987: writeback_queue_io: bdi 0:15: older=4295061016 age=30000 enqueue=1
flush-0:15-2214 [005] 427.651550: writeback_queue_io: bdi 0:15: older=4295066016 age=30000 enqueue=0
flush-0:15-2214 [005] 432.636088: writeback_queue_io: bdi 0:15: older=4295071016 age=30000 enqueue=0
flush-0:15-2214 [005] 437.620649: writeback_queue_io: bdi 0:15: older=4295076016 age=30000 enqueue=0
flush-0:15-2214 [005] 442.605199: writeback_queue_io: bdi 0:15: older=4295081016 age=30000 enqueue=0
flush-0:15-2214 [005] 447.589750: writeback_queue_io: bdi 0:15: older=4295086016 age=30000 enqueue=2
flush-0:15-2214 [005] 452.574296: writeback_queue_io: bdi 0:15: older=4295091016 age=30000 enqueue=1
flush-0:15-2214 [005] 457.558861: writeback_queue_io: bdi 0:15: older=4295096016 age=30000 enqueue=0
flush-0:15-2214 [005] 462.543399: writeback_queue_io: bdi 0:15: older=4295101016 age=30000 enqueue=0
flush-0:15-2214 [005] 467.527961: writeback_queue_io: bdi 0:15: older=4295106016 age=30000 enqueue=0
flush-0:15-2214 [005] 472.512492: writeback_queue_io: bdi 0:15: older=4295111016 age=30000 enqueue=0
flush-0:15-2214 [005] 477.497055: writeback_queue_io: bdi 0:15: older=4295116016 age=30000 enqueue=2
flush-0:15-2214 [005] 482.481630: writeback_queue_io: bdi 0:15: older=4295121016 age=30000 enqueue=1
flush-0:15-2214 [005] 487.466162: writeback_queue_io: bdi 0:15: older=4295126016 age=30000 enqueue=0
flush-0:15-2214 [005] 492.450709: writeback_queue_io: bdi 0:15: older=4295131016 age=30000 enqueue=0
flush-0:15-2214 [005] 497.435268: writeback_queue_io: bdi 0:15: older=4295136016 age=30000 enqueue=0
flush-0:15-2214 [005] 502.419812: writeback_queue_io: bdi 0:15: older=4295141016 age=30000 enqueue=0
flush-0:15-2214 [005] 507.404385: writeback_queue_io: bdi 0:15: older=4295146016 age=30000 enqueue=2
flush-0:15-2214 [005] 512.388906: writeback_queue_io: bdi 0:15: older=4295151016 age=30000 enqueue=1
flush-0:15-2214 [005] 517.373458: writeback_queue_io: bdi 0:15: older=4295156016 age=30000 enqueue=0
flush-0:15-2214 [005] 522.358005: writeback_queue_io: bdi 0:15: older=4295161016 age=30000 enqueue=0
flush-0:15-2214 [005] 527.342587: writeback_queue_io: bdi 0:15: older=4295166016 age=30000 enqueue=0
flush-0:15-2214 [005] 532.327116: writeback_queue_io: bdi 0:15: older=4295171016 age=30000 enqueue=0
Thanks,
Fengguang
--
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/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2011-05-06 5:30 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-20 8:03 [PATCH 0/6] writeback: moving expire targets for background/kupdate works v2 Wu Fengguang
2011-04-20 8:03 ` Wu Fengguang
2011-04-20 8:03 ` [PATCH 1/6] writeback: pass writeback_control down to move_expired_inodes() Wu Fengguang
2011-04-20 8:03 ` Wu Fengguang
2011-05-04 11:04 ` Christoph Hellwig
2011-05-04 11:04 ` Christoph Hellwig
2011-05-04 11:13 ` Wu Fengguang
2011-05-04 11:13 ` Wu Fengguang
2011-04-20 8:03 ` [PATCH 2/6] writeback: introduce writeback_control.inodes_cleaned Wu Fengguang
2011-04-20 8:03 ` Wu Fengguang
2011-04-20 8:03 ` Wu Fengguang
2011-05-04 11:05 ` Christoph Hellwig
2011-05-04 11:05 ` Christoph Hellwig
2011-05-04 11:11 ` Wu Fengguang
2011-05-04 11:11 ` Wu Fengguang
2011-05-04 11:16 ` Christoph Hellwig
2011-05-04 11:16 ` Christoph Hellwig
2011-05-04 11:32 ` Wu Fengguang
2011-05-04 11:32 ` Wu Fengguang
2011-04-20 8:03 ` [PATCH 3/6] writeback: try more writeback as long as something was written Wu Fengguang
2011-04-20 8:03 ` Wu Fengguang
2011-04-20 8:03 ` Wu Fengguang
2011-04-20 8:03 ` [PATCH 4/6] writeback: the kupdate expire timestamp should be a moving target Wu Fengguang
2011-04-20 8:03 ` Wu Fengguang
2011-04-20 8:03 ` [PATCH 5/6] writeback: sync expired inodes first in background writeback Wu Fengguang
2011-04-20 8:03 ` Wu Fengguang
2011-04-20 8:03 ` Wu Fengguang
2011-04-20 23:40 ` Andrew Morton
2011-04-20 23:40 ` Andrew Morton
2011-04-20 23:40 ` Andrew Morton
2011-04-21 1:14 ` Wu Fengguang
2011-04-21 1:14 ` Wu Fengguang
2011-04-21 1:21 ` Wu Fengguang
2011-04-21 1:21 ` Wu Fengguang
2011-04-24 3:15 ` Wu Fengguang
2011-04-24 3:15 ` Wu Fengguang
2011-04-26 12:17 ` Jan Kara
2011-04-26 12:17 ` Jan Kara
2011-04-26 13:51 ` Wu Fengguang
2011-04-26 13:51 ` Wu Fengguang
2011-04-26 13:59 ` Wu Fengguang
2011-04-26 13:59 ` Wu Fengguang
2011-04-26 14:05 ` Wu Fengguang
2011-04-26 14:05 ` Wu Fengguang
2011-04-27 11:15 ` Wu Fengguang
2011-04-27 11:15 ` Wu Fengguang
2011-04-20 8:03 ` [PATCH 6/6] writeback: refill b_io iff empty Wu Fengguang
2011-04-20 8:03 ` Wu Fengguang
2011-04-20 8:03 ` Wu Fengguang
2011-05-04 7:39 ` Wu Fengguang
2011-05-05 16:37 ` Jan Kara
2011-05-05 16:37 ` Jan Kara
2011-05-05 16:47 ` Wu Fengguang
2011-05-05 16:47 ` Wu Fengguang
2011-05-06 5:29 ` Wu Fengguang [this message]
2011-05-06 5:29 ` Wu Fengguang
2011-05-06 8:42 ` [RFC][PATCH] writeback: limit number of moved inodes in queue_io() Wu Fengguang
2011-05-06 8:42 ` Wu Fengguang
2011-05-06 10:06 ` [RFC][PATCH v2] " Wu Fengguang
2011-05-06 10:06 ` Wu Fengguang
2011-05-06 23:06 ` Dave Chinner
2011-05-06 23:06 ` Dave Chinner
2011-05-06 14:21 ` [PATCH 6/6] writeback: refill b_io iff empty Jan Kara
2011-05-06 14:21 ` Jan Kara
2011-05-10 4:31 ` Wu Fengguang
2011-05-10 4:53 ` Dave Chinner
2011-05-10 4:53 ` Dave Chinner
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=20110506052955.GA24904@localhost \
--to=fengguang.wu@intel.com \
--cc=akpm@linux-foundation.org \
--cc=david@fromorbit.com \
--cc=jack@suse.cz \
--cc=kitayama@cl.bb4u.ne.jp \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mel@csn.ul.ie \
--cc=mel@linux.vnet.ibm.com \
--cc=minchan.kim@gmail.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.