linux-toradex.git/Documentation/admin-guide/device-mapper/writecache.rst, branch v5.17-rc7

dm writecache: add event counters

2021-08-10T17:27:49+00:00

Add 10 counters for various events (hit, miss, etc) and export them in
the status line (accessed from userspace with "dmsetup status"). Also
add a message "clear_stats" that resets these counters.

Signed-off-by: Mikulas Patocka 
Signed-off-by: Mike Snitzer

dm writecache: make writeback pause configurable

2021-06-28T20:30:13+00:00

Commit 95b88f4d71cb953e02206be3c757083601391a0f ("dm writecache: pause
writeback if cache full and origin being written directly") introduced a
code that pauses cache flushing if we are issuing writes directly to the
origin.

Improve that initial commit by making the timeout code configurable
(via the option "pause_writeback"). Also change the default from 1s to
3s because it performed better.

Signed-off-by: Mikulas Patocka 
Signed-off-by: Mike Snitzer

dm writecache: add optional "metadata_only" parameter

2021-06-25T19:25:21+00:00

Add a "metadata_only" parameter that when present: only metadata is
promoted to the cache. This option improves performance for heavier
REQ_META workloads (e.g. device-mapper-test-suite's "git clone and
checkout" benchmark improves from 341s to 312s).

Signed-off-by: Mikulas Patocka 
Signed-off-by: Mike Snitzer

dm writecache: add "cleaner" and "max_age" to Documentation

2021-06-25T19:25:19+00:00

Backfill missing Documentation.

Fixes: 93de44eb3fc8 ("dm writecache: implement the "cleaner" policy")
Fixes: 3923d4854e18 ("dm writecache: implement gradual cleanup")
Signed-off-by: Mike Snitzer

Documentation: fix multiple typos found in the admin-guide subdirectory

2020-12-08T17:27:56+00:00

Fix thirty five typos in dm-integrity.rst, dm-raid.rst, dm-zoned.rst,
verity.rst, writecache.rst, tsx_async_abort.rst, md.rst, bttv.rst,
dvb_references.rst, frontend-cardlist.rst, gspca-cardlist.rst, ipu3.rst,
remote-controller.rst, mm/index.rst, numaperf.rst, userfaultfd.rst,
module-signing.rst, imx-ddr.rst, intel-speed-select.rst,
intel_pstate.rst, ramoops.rst, abi.rst, kernel.rst, vm.rst

Signed-off-by: Andrew Klychkov 
Link: https://lore.kernel.org/r/20201204072848.GA49895@spblnx124.lan
Signed-off-by: Jonathan Corbet

docs: device-mapper: move it to the admin-guide

2019-07-15T14:03:01+00:00

The DM support describes lots of aspects related to mapped
disk partitions from the userspace PoV.

Signed-off-by: Mauro Carvalho Chehab