[dm-devel] [PATCH v3 0/2] Historical Service Time Path Selector
Gabriel Krisman Bertazi
krisman at collabora.com
Thu Apr 30 20:48:28 UTC 2020
Hi,
This is the third version of HST considering the review by Mike
Snitzer. This version drops the encapsulation patches and passes the
parameter directly to end_io. It also uses jiffies_to_nsecs directly in
dm_start_time_ns_from_clone, instead of converting to msecs in an
intermediary step.
This didn't show any regressions compared to the benchmark I presented
on previous version:
v2: https://www.redhat.com/archives/dm-devel/2020-April/msg00270.html
v1: https://www.redhat.com/archives/dm-devel/2020-April/msg00176.html
This was tested primarily on a Google cloud SAN with real data and usage
patterns and with artificial benchmarks using fio.
Gabriel Krisman Bertazi (1):
md: mpath: Pass IO start time to path selector
Khazhismel Kumykov (1):
md: mpath: Add Historical Service Time Path Selector
drivers/md/Kconfig | 11 +
drivers/md/Makefile | 1 +
drivers/md/dm-historical-service-time.c | 561 ++++++++++++++++++++++++
drivers/md/dm-mpath.c | 9 +-
drivers/md/dm-path-selector.h | 2 +-
drivers/md/dm-queue-length.c | 2 +-
drivers/md/dm-service-time.c | 2 +-
drivers/md/dm.c | 10 +
include/linux/device-mapper.h | 2 +
9 files changed, 594 insertions(+), 6 deletions(-)
create mode 100644 drivers/md/dm-historical-service-time.c
--
2.26.2
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