Hi Alasdair, This patch-set adds barrier support for request-based dm-multipath. It is made on top of 2.6.32-rc4 + the patches below: o http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commit;h=a9327cac440be4d8333bba975cbbf76045096275 (Seperate read and write statistics of in_flight requests) o The patches below in the Alasdair's editing tree: dm-add-missing-del_gendisk-to-alloc_dev-error-path.patch dm-dec_pending-needs-locking-to-save-error-value.patch dm-ioctl-prefer-strlcpy-over-strncpy.patch dm-trace-request-based-remapping.patch Most patches are clean-ups and refactorings for preparation of the last patch. Please review and apply if no problem. Summary of the patch-set: 1/9: dm core: clean up in-flight checking 2/9: rqdm core: map_request() takes clone instead of orig 3/9: rqdm core: alloc_rq_tio() takes gfp_mask 4/9: rqdm core: clean up request cloning 5/9: rqdm core: simplify suspend code 6/9: rqdm core: use md->pending for in_flight I/O counting 7/9: rqdm core: refactor completion functions 8/9: rqdm core: move dm_end_request() 9/9: rqdm core: add barrier support drivers/md/dm.c | 582 +++++++++++++++++++++++++++++++------------------------- 1 file changed, 323 insertions(+), 259 deletions(-) Thanks, Kiyoshi Ueda -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel