NeilBrown 34db0cd60f md: add proper write-congestion reporting to RAID1 and RAID10. ... RAID1 and RAID10 handle write requests by queuing them for handling by a separate thread. This is because when a write-intent-bitmap is active we might need to update the bitmap first, so it is good to queue a lot of writes, then do one big bitmap update for them all. However writeback request devices to appear to be congested after a while so it can make some guesstimate of throughput. The infinite queue defeats that (note that RAID5 has already has a finite queue so it doesn't suffer from this problem). So impose a limit on the number of pending write requests. By default it is 1024 which seems to be generally suitable. Make it configurable via module option just in case someone finds a regression. Signed-off-by: NeilBrown <neilb@suse.de>		2011-10-11 16:50:01 +11:00
..
bitmap.c	md/bitmap remove fault injection options.	2011-10-11 16:49:56 +11:00
bitmap.h	md: remove typedefs: mddev_t -> struct mddev	2011-10-11 16:47:53 +11:00
dm-bio-record.h
dm-crypt.c	dm crypt: optionally support discard requests	2011-08-02 12:32:08 +01:00
dm-delay.c	dm: convert workqueues to alloc_ordered	2011-01-13 19:59:57 +00:00
dm-exception-store.c	dm snapshot: test chunk size against both origin and snapshot	2010-08-12 04:13:51 +01:00
dm-exception-store.h	dm snapshot: test chunk size against both origin and snapshot	2010-08-12 04:13:51 +01:00
dm-flakey.c	dm flakey: add corrupt_bio_byte feature	2011-08-02 12:32:06 +01:00
dm-io.c	dm io: flush cpu cache with vmapped io	2011-08-02 12:32:01 +01:00
dm-ioctl.c	dm ioctl: forbid multiple device specifiers	2011-08-02 12:32:06 +01:00
dm-kcopyd.c	dm snapshot: skip reading origin when overwriting complete chunk	2011-08-02 12:32:04 +01:00
dm-linear.c	dm: use dm_target_offset macro	2010-08-12 04:14:11 +01:00
dm-log-userspace-base.c	dm log: userspace use list_move	2011-08-02 12:32:02 +01:00
dm-log-userspace-transfer.c	netlink: kill eff_cap from struct netlink_skb_parms	2011-03-03 13:32:07 -08:00
dm-log-userspace-transfer.h	dm log: userspace add luid to distinguish between concurrent log instances	2009-09-04 20:40:34 +01:00
dm-log.c	dm: use vzalloc	2011-08-02 12:32:02 +01:00
dm-mpath.c	dm table: share target argument parsing functions	2011-08-02 12:32:04 +01:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h	dm mpath: add start_io and nr_bytes to path selectors	2009-06-22 10:12:27 +01:00
dm-queue-length.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
dm-raid1.c	dm kcopyd: return client directly and not through a pointer	2011-05-29 13:03:13 +01:00
dm-raid.c	md/raid5: typedef removal: raid5_conf_t -> struct r5conf	2011-10-11 16:49:52 +11:00
dm-region-hash.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
dm-round-robin.c	dm mpath: add start_io and nr_bytes to path selectors	2009-06-22 10:12:27 +01:00
dm-service-time.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
dm-snap-persistent.c	dm snapshot: style cleanups	2011-08-02 12:32:03 +01:00
dm-snap-transient.c	dm snapshot: move cow ref from exception store to snap core	2009-12-10 23:52:12 +00:00
dm-snap.c	dm snapshot: skip reading origin when overwriting complete chunk	2011-08-02 12:32:04 +01:00
dm-stripe.c	dm stripe: implement merge method	2011-03-24 13:54:35 +00:00
dm-sysfs.c	Driver core: Constify struct sysfs_ops in struct kobj_type	2010-03-07 17:04:49 -08:00
dm-table.c	dm table: set flush capability based on underlying devices	2011-08-02 12:32:08 +01:00
dm-target.c	dm: error return error for discards	2010-08-12 04:14:14 +01:00
dm-uevent.c	dm table: remove dm_get from dm_table_get_md	2010-03-06 02:29:52 +00:00
dm-uevent.h
dm-zero.c	dm: zero silently drop discards	2010-08-12 04:14:12 +01:00
dm.c	dm table: set flush capability based on underlying devices	2011-08-02 12:32:08 +01:00
dm.h	dm: ignore merge_bvec for snapshots when safe	2011-08-02 12:32:04 +01:00
faulty.c	md: rename "mdk_personality" to "md_personality"	2011-10-11 16:49:58 +11:00
Kconfig	dm raid: support metadata devices	2011-08-02 12:32:07 +01:00
linear.c	md: rename "mdk_personality" to "md_personality"	2011-10-11 16:49:58 +11:00
linear.h	md/linear: typedef removal: linear_conf_t -> struct linear_conf	2011-10-11 16:48:54 +11:00
Makefile	dm: add flakey target	2011-03-24 13:54:24 +00:00
md.c	md: rename "mdk_personality" to "md_personality"	2011-10-11 16:49:58 +11:00
md.h	md: rename "mdk_personality" to "md_personality"	2011-10-11 16:49:58 +11:00
multipath.c	md: rename "mdk_personality" to "md_personality"	2011-10-11 16:49:58 +11:00
multipath.h	md/multipath: typedef removal: multipath_conf_t -> struct mpconf	2011-10-11 16:48:57 +11:00
raid0.c	md: rename "mdk_personality" to "md_personality"	2011-10-11 16:49:58 +11:00
raid0.h	md/raid0: typedef removal: raid0_conf_t -> struct r0conf	2011-10-11 16:48:59 +11:00
raid1.c	md: add proper write-congestion reporting to RAID1 and RAID10.	2011-10-11 16:50:01 +11:00
raid1.h	md: add proper write-congestion reporting to RAID1 and RAID10.	2011-10-11 16:50:01 +11:00
raid5.c	md: rename "mdk_personality" to "md_personality"	2011-10-11 16:49:58 +11:00
raid5.h	md/raid5: typedef removal: raid5_conf_t -> struct r5conf	2011-10-11 16:49:52 +11:00
raid10.c	md: add proper write-congestion reporting to RAID1 and RAID10.	2011-10-11 16:50:01 +11:00
raid10.h	md: add proper write-congestion reporting to RAID1 and RAID10.	2011-10-11 16:50:01 +11:00