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Pull device mapper updates from Mike Snitzer: - Refactor DM core's mempool allocation so that it clearer by not being split acorss files. - Improve DM core's BLK_STS_DM_REQUEUE and BLK_STS_AGAIN handling. - Optimize DM core's more common bio splitting by eliminating the use of bio cloning with bio_split+bio_chain. Shift that cloning cost to the relatively unlikely dm_io requeue case that only occurs during error handling. Introduces dm_io_rewind() that will clone a bio that reflects the subset of the original bio that must be requeued. - Remove DM core's dm_table_get_num_targets() wrapper and audit all dm_table_get_target() callers. - Fix potential for OOM with DM writecache target by setting a default MAX_WRITEBACK_JOBS (set to 256MiB or 1/16 of total system memory, whichever is smaller). - Fix DM writecache target's stats that are reported through DM-specific table info. - Fix use-after-free crash in dm_sm_register_threshold_callback(). - Refine DM core's Persistent Reservation handling in preparation for broader work Mike Christie is doing to add compatibility with Microsoft Windows Failover Cluster. - Fix various KASAN reported bugs in the DM raid target. - Fix DM raid target crash due to md_handle_request() bio splitting that recurses to block core without properly initializing the bio's bi_dev. - Fix some code comment typos and fix some Documentation formatting. * tag 'for-6.0/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (29 commits) dm: fix dm-raid crash if md_handle_request() splits bio dm raid: fix address sanitizer warning in raid_resume dm raid: fix address sanitizer warning in raid_status dm: Start pr_preempt from the same starting path dm: Fix PR release handling for non All Registrants dm: Start pr_reserve from the same starting path dm: Allow dm_call_pr to be used for path searches dm: return early from dm_pr_call() if DM device is suspended dm thin: fix use-after-free crash in dm_sm_register_threshold_callback dm writecache: count number of blocks discarded, not number of discard bios dm writecache: count number of blocks written, not number of write bios dm writecache: count number of blocks read, not number of read bios dm writecache: return void from functions dm kcopyd: use __GFP_HIGHMEM when allocating pages dm writecache: set a default MAX_WRITEBACK_JOBS Documentation: dm writecache: Render status list as list Documentation: dm writecache: add blank line before optional parameters dm snapshot: fix typo in snapshot_map() comment dm raid: remove redundant "the" in parse_raid_params() comment dm cache: fix typo in 2 comment blocks ...
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.