On 12 May 2012 05:46, Dan Williams <dan.j.williams@xxxxxxxxx> wrote:
> The consensus from LSF was that bcache need not invent a new interface
> when md and dm can both do the job. As mentioned in patch 7 this series
> aims to be a minimal conversion. Other refactoring items like
> deprecating register_lock for mddev->reconfig_mutex are deferred.
>
> This supports assembly of an already established cache array:
>
> mdadm -A /dev/md/bcache /dev/sd[ab]
>
> ...will create the /dev/md/bcache container and a subarray representing
> the cache volume. "Flash-only", or backing-device only volumes were not
> tested. "Create" support and hot-add/hot-remove come later.
>
> Note:
> * When attempting to test with small loopback devices (100MB), assembly
> soft locks in bcache_journal_read(). That hang went away with larger
> devices, so there seems to be minimum component device size that needs
> to be considered in the tooling.
>
> ---
>
> Dan Williams (7):
> bcache: compile fix
> bcache: disable lockdep, enable CONFIG_BCACHE=m
> bcache: drop select COMPACTION
> bcache: fix symlink removal
> bcache: move to drivers/md/
> bcache: uplevel allocation of 'cached_dev' and 'cache'
> md: add bcache personality
>
>
> drivers/block/Kconfig | 2
> drivers/block/Makefile | 1
> drivers/md/Kconfig | 14 +
> drivers/md/Makefile | 1
> drivers/md/bcache/Kconfig | 3
> drivers/md/bcache/Makefile | 2
> drivers/md/bcache/alloc.c | 0
> drivers/md/bcache/bcache.h | 39 ++++
> drivers/md/bcache/bset.c | 0
> drivers/md/bcache/bset.h | 0
> drivers/md/bcache/btree.c | 18 --
> drivers/md/bcache/btree.h | 0
> drivers/md/bcache/debug.c | 0
> drivers/md/bcache/debug.h | 0
> drivers/md/bcache/io.c | 0
> drivers/md/bcache/journal.c | 0
> drivers/md/bcache/journal.h | 0
> drivers/md/bcache/md.c | 374 ++++++++++++++++++++++++++++++++++++
> drivers/md/bcache/request.c | 24 +-
> drivers/md/bcache/request.h | 0
> drivers/md/bcache/stats.c | 0
> drivers/md/bcache/stats.h | 0
> drivers/md/bcache/super.c | 394 +++++++++-----------------------------
> drivers/md/bcache/sysfs.c | 49 -----
> drivers/md/bcache/sysfs.h | 0
> drivers/md/bcache/trace.c | 0
> drivers/md/bcache/util.c | 2
> drivers/md/bcache/util.h | 3
> drivers/md/bcache/writeback.c | 0
> kernel/lockdep.c | 1
> 30 files changed, 539 insertions(+), 388 deletions(-)
> rename drivers/{block/bcache/Kconfig => md/bcache/Kconfig} (95%)
> rename drivers/{block/bcache/Makefile => md/bcache/Makefile} (77%)
> rename drivers/{block/bcache/alloc.c => md/bcache/alloc.c} (100%)
> rename drivers/{block/bcache/bcache.h => md/bcache/bcache.h} (94%)
> rename drivers/{block/bcache/bset.c => md/bcache/bset.c} (100%)
> rename drivers/{block/bcache/bset.h => md/bcache/bset.h} (100%)
> rename drivers/{block/bcache/btree.c => md/bcache/btree.c} (99%)
> rename drivers/{block/bcache/btree.h => md/bcache/btree.h} (100%)
> rename drivers/{block/bcache/debug.c => md/bcache/debug.c} (100%)
> rename drivers/{block/bcache/debug.h => md/bcache/debug.h} (100%)
> rename drivers/{block/bcache/io.c => md/bcache/io.c} (100%)
> rename drivers/{block/bcache/journal.c => md/bcache/journal.c} (100%)
> rename drivers/{block/bcache/journal.h => md/bcache/journal.h} (100%)
> create mode 100644 drivers/md/bcache/md.c
> rename drivers/{block/bcache/request.c => md/bcache/request.c} (98%)
> rename drivers/{block/bcache/request.h => md/bcache/request.h} (100%)
> rename drivers/{block/bcache/stats.c => md/bcache/stats.c} (100%)
> rename drivers/{block/bcache/stats.h => md/bcache/stats.h} (100%)
> rename drivers/{block/bcache/super.c => md/bcache/super.c} (83%)
> rename drivers/{block/bcache/sysfs.c => md/bcache/sysfs.c} (95%)
> rename drivers/{block/bcache/sysfs.h => md/bcache/sysfs.h} (100%)
> rename drivers/{block/bcache/trace.c => md/bcache/trace.c} (100%)
> rename drivers/{block/bcache/util.c => md/bcache/util.c} (99%)
> rename drivers/{block/bcache/util.h => md/bcache/util.h} (99%)
> rename drivers/{block/bcache/writeback.c => md/bcache/writeback.c} (100%)
> --
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This is very interesting,
I will play around with these this weekend. :)
Joseph.
--
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Orion Virtualisation Solutions | www.orionvm.com.au | Phone: 1300 56
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