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NeilBrown 050b66152f md/raid10: handle merge_bvec_fn in member devices. 
Currently we don't honour merge_bvec_fn in member devices so if there
is one, we force all requests to be single-page at most.
This is not ideal.

So enhance the raid10 merge_bvec_fn to check that function in children
as well.

This introduces a small problem.  There is no locking around calls
the ->merge_bvec_fn and subsequent calls to ->make_request.  So a
device added between these could end up getting a request which
violates its merge_bvec_fn.

Currently the best we can do is synchronize_sched().  This will work
providing no preemption happens.  If there is preemption, we just
have to hope that new devices are largely consistent with old devices.

Signed-off-by: NeilBrown <neilb@suse.de>
 		2012-03-19 12:46:39 +11:00
..
persistent-data device-mapper: using EXPORT_SYBOL in dm-space-map-checker.c needs export.h 2011-11-07 10:29:10 -08:00
Kconfig dm: add thin provisioning target 2011-10-31 20:21:18 +00:00
Makefile dm: add thin provisioning target 2011-10-31 20:21:18 +00:00
bitmap.c md: tidy up rdev_for_each usage. 2012-03-19 12:46:39 +11:00
bitmap.h md: remove typedefs: mddev_t -> struct mddev 2011-10-11 16:47:53 +11:00
dm-bio-record.h
…
dm-bufio.c device-mapper: dm-bufio.c needs to include module.h 2011-11-07 10:29:10 -08:00
dm-bufio.h dm: add bufio 2011-10-31 20:19:09 +00:00
dm-crypt.c dm crypt: always disable discard_zeroes_data 2011-09-25 23:26:21 +01:00
dm-delay.c
…
dm-exception-store.c md: Add module.h to all files using it implicitly 2011-10-31 19:31:18 -04:00
dm-exception-store.h
…
dm-flakey.c dm flakey: fix crash on read when corrupt_bio_byte not set 2012-03-07 19:09:39 +00:00
dm-io.c dm io: fix discard support 2012-03-07 19:09:37 +00:00
dm-ioctl.c dm ioctl: do not leak argv if target message only contains whitespace 2012-03-07 19:09:34 +00:00
dm-kcopyd.c dm kcopyd: add dm_kcopyd_zero to zero an area 2011-10-31 20:18:58 +00:00
dm-linear.c dm: do not forward ioctls from logical volumes to the underlying device 2012-01-14 15:07:24 -08:00
dm-log-userspace-base.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
dm-log-userspace-transfer.c
…
dm-log-userspace-transfer.h
…
dm-log.c dm: use vzalloc 2011-08-02 12:32:02 +01:00
dm-mpath.c dm: do not forward ioctls from logical volumes to the underlying device 2012-01-14 15:07:24 -08:00
dm-mpath.h
…
dm-path-selector.c md: Add module.h to all files using it implicitly 2011-10-31 19:31:18 -04:00
dm-path-selector.h
…
dm-queue-length.c
…
dm-raid.c md: tidy up rdev_for_each usage. 2012-03-19 12:46:39 +11:00
dm-raid1.c
…
dm-region-hash.c
…
dm-round-robin.c md: Add module.h to all files using it implicitly 2011-10-31 19:31:18 -04:00
dm-service-time.c md: Add module.h to all files using it implicitly 2011-10-31 19:31:18 -04:00
dm-snap-persistent.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-snap-transient.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-snap.c dm snapshot: skip reading origin when overwriting complete chunk 2011-08-02 12:32:04 +01:00
dm-stripe.c
…
dm-sysfs.c
…
dm-table.c block: Introduce blk_set_stacking_limits function 2012-01-11 16:27:11 +01:00
dm-target.c
…
dm-thin-metadata.c dm thin metadata: decrement counter after removing mapped block 2012-03-07 19:09:44 +00:00
dm-thin-metadata.h dm: add thin provisioning target 2011-10-31 20:21:18 +00:00
dm-thin.c dm: add thin provisioning target 2011-10-31 20:21:18 +00:00
dm-uevent.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-uevent.h
…
dm-zero.c
…
dm.c fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
dm.h dm table: add immutable feature 2011-10-31 20:19:04 +00:00
faulty.c md: tidy up rdev_for_each usage. 2012-03-19 12:46:39 +11:00
linear.c md: add proper merge_bvec handling to RAID0 and Linear. 2012-03-19 12:46:39 +11:00
linear.h md/linear: typedef removal: linear_conf_t -> struct linear_conf 2011-10-11 16:48:54 +11:00
md.c md/raid10: handle merge_bvec_fn in member devices. 2012-03-19 12:46:39 +11:00
md.h md/raid10: handle merge_bvec_fn in member devices. 2012-03-19 12:46:39 +11:00
multipath.c md: tidy up rdev_for_each usage. 2012-03-19 12:46:39 +11:00
multipath.h md/multipath: typedef removal: multipath_conf_t -> struct mpconf 2011-10-11 16:48:57 +11:00
raid0.c md: add proper merge_bvec handling to RAID0 and Linear. 2012-03-19 12:46:39 +11:00
raid0.h md: add proper merge_bvec handling to RAID0 and Linear. 2012-03-19 12:46:39 +11:00
raid1.c md: tidy up rdev_for_each usage. 2012-03-19 12:46:39 +11:00
raid1.h md/raid1: Allocate spare to store replacement devices and their bios. 2011-12-23 10:17:56 +11:00
raid5.c md: tidy up rdev_for_each usage. 2012-03-19 12:46:39 +11:00
raid5.h md/raid5: detect and handle replacements during recovery. 2011-12-23 10:17:53 +11:00
raid10.c md/raid10: handle merge_bvec_fn in member devices. 2012-03-19 12:46:39 +11:00
raid10.h md/raid10: prepare data structures for handling replacement. 2011-12-23 10:17:54 +11:00