The following changes since commit 272b98c6455f00884f0350f775c5342358ebb73f:
Linux 3.12-rc1 (2013-09-16 16:17:51 -0400)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git tags/dm-3.12-fixes
for you to fetch changes up to e8603136cb04ec2d0c9b4b5be7a071fc003cb399:
dm: add reserved_bio_based_ios module parameter (2013-09-23 10:42:24 -0400)
Please pull, thanks.
Mike
----------------------------------------------------------------
A set of device-mapper fixes for 3.12.
A few fixes for dm-snapshot, a 32 bit fix for dm-stats, a couple error
handling fixes for dm-multipath. A fix for the thin provisioning target
to not expose non-zero discard limits if discards are disabled.
Lastly, add two DM module parameters which allow users to tune the
emergency memory reserves that DM mainatins per device -- this helps fix
a long-standing issue for dm-multipath. The conservative default
reserve for request-based dm-multipath devices (256) has proven
problematic for users with many multipathed SCSI devices but relatively
little memory. To responsibly select a smaller value users should use
the new nr_bios tracepoint info (via commit 75afb352 "block: Add nr_bios
to block_rq_remap tracepoint") to determine the peak number of bios
their workloads create.
----------------------------------------------------------------
Jun'ichi Nomura (1):
dm mpath: do not fail path on -ENOSPC
Mike Snitzer (5):
dm mpath: disable WRITE SAME if it fails
dm thin: do not expose non-zero discard limits if discards disabled
dm: lower bio-based mempool reservation
dm: add reserved_rq_based_ios module parameter
dm: add reserved_bio_based_ios module parameter
Mikulas Patocka (3):
dm stats: fix possible counter corruption on 32-bit systems
dm snapshot: workaround for a false positive lockdep warning
dm-snapshot: fix performance degradation due to small hash size
drivers/md/dm-io.c | 7 ++--
drivers/md/dm-mpath.c | 18 ++++++++---
drivers/md/dm-snap-persistent.c | 2 +-
drivers/md/dm-snap.c | 5 ++-
drivers/md/dm-stats.c | 23 +++++++++----
drivers/md/dm-thin.c | 14 ++++++--
drivers/md/dm.c | 71 ++++++++++++++++++++++++++++++++++++++---
drivers/md/dm.h | 3 ++
include/linux/device-mapper.h | 3 +-
9 files changed, 120 insertions(+), 26 deletions(-)