[dm-devel] [5.20 PATCH v3 0/2] dm: improve bio splitting at expense of requeue complexity
Mike Snitzer
snitzer at kernel.org
Wed Jul 6 17:44:01 UTC 2022
This v3 moves all bio_rewind() code to drivers/md/dm-io-rewind.c for
exclussive use by DM core's dm_io requeue support via dm_io_rewind().
It was determined that block core doesn't need to expose bio_rewind()
for more general use. If/when that changes we can revisit, armed with
the understanding of how DM's use of bio_rewind() has faired.
These changes are now staged for 5.20 inclussion via linux-dm.git
Ming Lei (2):
dm: add bio_rewind() API to DM core
dm: add two stage requeue mechanism
drivers/md/Makefile | 2 +-
drivers/md/dm-core.h | 13 +++-
drivers/md/dm-io-rewind.c | 166 ++++++++++++++++++++++++++++++++++++++++++++++
drivers/md/dm.c | 121 +++++++++++++++++++++++++--------
4 files changed, 273 insertions(+), 29 deletions(-)
create mode 100644 drivers/md/dm-io-rewind.c
--
2.15.0
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