Tang Junhui 89b1fc54c2 bcache: increase the number of open buckets ... In currently, we only alloc 6 open buckets for each cache set, but in usually, we always attach about 10 or so backend devices for each cache set, and the each bcache device are always accessed by about 10 or so threads in top application layer. So 6 open buckets are too few, It has led to that each of the same thread write data to different buckets, which would cause low efficiency write-back, and also cause buckets inefficient, and would be Very easy to run out of. I add debug message in bch_open_buckets_alloc() to print alloc bucket info, and test with ten bcache devices with a cache set, and each bcache device is accessed by ten threads. From the debug message, we can see that, after the modification, One bucket is more likely to assign to the same thread, and the data from the same thread are more likely to write the same bucket. Usually the same thread always write/read the same backend device, so it is good for write-back and also promote the usage efficiency of buckets. Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn> Reviewed-by: Coly Li <colyli@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2017-09-06 08:17:33 -06:00
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bcache	bcache: increase the number of open buckets	2017-09-06 08:17:33 -06:00
persistent-data
bitmap.c	md/bitmap: don't read page from device with Bitmap_sync	2017-07-10 10:30:41 -07:00
bitmap.h
dm-bio-prison-v1.c
dm-bio-prison-v1.h
dm-bio-prison-v2.c
dm-bio-prison-v2.h
dm-bio-record.h	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-bufio.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-bufio.h
dm-builtin.c
dm-cache-background-tracker.c
dm-cache-background-tracker.h
dm-cache-block-types.h
dm-cache-metadata.c
dm-cache-metadata.h
dm-cache-policy-internal.h
dm-cache-policy-smq.c
dm-cache-policy.c
dm-cache-policy.h
dm-cache-target.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-core.h
dm-crypt.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-delay.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-era-target.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-exception-store.c
dm-exception-store.h
dm-flakey.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-integrity.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-io.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-ioctl.c
dm-kcopyd.c
dm-linear.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-log-userspace-base.c
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-log.c
dm-mpath.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-queue-length.c
dm-raid.c	dm raid: bump target version	2017-07-25 14:54:20 -04:00
dm-raid1.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-region-hash.c
dm-round-robin.c
dm-rq.c
dm-rq.h
dm-service-time.c
dm-snap-persistent.c
dm-snap-transient.c
dm-snap.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-stats.c
dm-stats.h
dm-stripe.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-switch.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-sysfs.c
dm-table.c	dm, dax: Make sure dm_dax_flush() is called if device supports it	2017-07-26 15:55:44 -04:00
dm-target.c
dm-thin-metadata.c
dm-thin-metadata.h
dm-thin.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-uevent.c
dm-uevent.h
dm-verity-fec.c	dm verity fec: fix GFP flags used with mempool_alloc()	2017-07-26 15:55:44 -04:00
dm-verity-fec.h
dm-verity-target.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-verity.h
dm-zero.c
dm-zoned-metadata.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-zoned-reclaim.c	dm zoned: use GFP_NOIO in I/O path	2017-07-26 15:55:43 -04:00
dm-zoned-target.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm-zoned.h
dm.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
dm.h
faulty.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
Kconfig
linear.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
linear.h
Makefile
md-cluster.c
md-cluster.h
md.c	Linux 4.13-rc7	2017-08-28 13:00:44 -06:00
md.h	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
multipath.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
multipath.h
raid0.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
raid0.h
raid1-10.c	md: raid1-10: move raid1/raid10 common code into raid1-10.c	2017-07-21 12:47:20 -07:00
raid1.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
raid1.h
raid5-cache.c	Linux 4.13-rc7	2017-08-28 13:00:44 -06:00
raid5-log.h
raid5-ppl.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
raid5.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
raid5.h
raid10.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
raid10.h