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SubjectBcache v. whatever
Bcache: a block layer SSD cache

Does writethrough and writeback, handles unclean shutdown, and has
various other nifty features. See the wiki and the documentation for
more:

http://bcache.evilpiepirate.org

Over the Christmas break I finally got the tree into a self contained
state that ought to be suitable for merging; this tree is fairly close
to the previous stable tree that people have been running on production
servers for awhile (and that I've been running on this workstation),
So, I think this is ready for mainline and I'd like to get it in. I
should've tried to push it ages ago, but I was hoping to get in various
block layer cleanups first; I finally deided to work around them in the
meantime since I haven't had time to finish the block layer stuff.

Not everything has been addressed since I last posted for review
feedback - notably the closure code was controversial and for now I've
just moved that into drivers/block/bcache (though I've been refactoring
stuff to make it less asynchronous lately; most of that work is in the
testing/dev branches). The bigger issue IMO is the userspace interface -
I'd like to finish the md integration so it doesn't need userspace stuff
for probing/bootup. So, I'd be fine with it going into staging if that's
the consensus, but it's stable tested code.

The code is available at
http://evilpiepirate.org/git/linux-bcache.git bcache-for-upstream

This latest branch is on top of v3.8-rc3:

----------------------------------------------------------------
Kent Overstreet (5):
Revert "rw_semaphore: remove up/down_read_non_owner"
Export get_random_int()
Export blk_fill_rwbs()
Export __lockdep_no_validate__
bcache: A block layer cache
Documentation/ABI/testing/sysfs-block-bcache | 156 ++
Documentation/bcache.txt | 343 ++++
drivers/char/random.c | 1 +
drivers/md/Kconfig | 2 +
drivers/md/Makefile | 1 +
drivers/md/bcache/Kconfig | 41 +
drivers/md/bcache/Makefile | 14 +
drivers/md/bcache/alloc.c | 612 +++++++
drivers/md/bcache/bcache.h | 1207 +++++++++++++
drivers/md/bcache/bset.c | 1175 ++++++++++++
drivers/md/bcache/bset.h | 378 ++++
drivers/md/bcache/btree.c | 2497 ++++++++++++++++++++++++++
drivers/md/bcache/btree.h | 412 +++++
drivers/md/bcache/closure.c | 347 ++++
drivers/md/bcache/closure.h | 670 +++++++
drivers/md/bcache/debug.c | 550 ++++++
drivers/md/bcache/debug.h | 54 +
drivers/md/bcache/io.c | 383 ++++
drivers/md/bcache/journal.c | 703 ++++++++
drivers/md/bcache/journal.h | 159 ++
drivers/md/bcache/movinggc.c | 245 +++
drivers/md/bcache/request.c | 1370 ++++++++++++++
drivers/md/bcache/request.h | 61 +
drivers/md/bcache/stats.c | 239 +++
drivers/md/bcache/stats.h | 58 +
drivers/md/bcache/super.c | 1952 ++++++++++++++++++++
drivers/md/bcache/sysfs.c | 807 +++++++++
drivers/md/bcache/sysfs.h | 98 +
drivers/md/bcache/trace.c | 26 +
drivers/md/bcache/util.c | 382 ++++
drivers/md/bcache/util.h | 587 ++++++
drivers/md/bcache/writeback.c | 406 +++++
include/linux/cgroup_subsys.h | 6 +
include/linux/rwsem.h | 10 +
include/linux/sched.h | 4 +
include/trace/events/bcache.h | 271 +++
kernel/fork.c | 4 +
kernel/lockdep.c | 1 +
kernel/rwsem.c | 16 +
kernel/trace/blktrace.c | 1 +
40 files changed, 16249 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-block-bcache
create mode 100644 Documentation/bcache.txt
create mode 100644 drivers/md/bcache/Kconfig
create mode 100644 drivers/md/bcache/Makefile
create mode 100644 drivers/md/bcache/alloc.c
create mode 100644 drivers/md/bcache/bcache.h
create mode 100644 drivers/md/bcache/bset.c
create mode 100644 drivers/md/bcache/bset.h
create mode 100644 drivers/md/bcache/btree.c
create mode 100644 drivers/md/bcache/btree.h
create mode 100644 drivers/md/bcache/closure.c
create mode 100644 drivers/md/bcache/closure.h
create mode 100644 drivers/md/bcache/debug.c
create mode 100644 drivers/md/bcache/debug.h
create mode 100644 drivers/md/bcache/io.c
create mode 100644 drivers/md/bcache/journal.c
create mode 100644 drivers/md/bcache/journal.h
create mode 100644 drivers/md/bcache/movinggc.c
create mode 100644 drivers/md/bcache/request.c
create mode 100644 drivers/md/bcache/request.h
create mode 100644 drivers/md/bcache/stats.c
create mode 100644 drivers/md/bcache/stats.h
create mode 100644 drivers/md/bcache/super.c
create mode 100644 drivers/md/bcache/sysfs.c
create mode 100644 drivers/md/bcache/sysfs.h
create mode 100644 drivers/md/bcache/trace.c
create mode 100644 drivers/md/bcache/util.c
create mode 100644 drivers/md/bcache/util.h
create mode 100644 drivers/md/bcache/writeback.c
create mode 100644 include/trace/events/bcache.h

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