[PATCH v4 00/22] btrfs: async discard support

From: Dennis Zhou <dennis@kernel.org>
To: David Sterba <dsterba@suse.com>, Chris Mason <clm@fb.com>,
	Josef Bacik <josef@toxicpanda.com>,
	Omar Sandoval <osandov@osandov.com>
Cc: kernel-team@fb.com, linux-btrfs@vger.kernel.org,
	Dennis Zhou <dennis@kernel.org>
Subject: [PATCH v4 00/22] btrfs: async discard support
Date: Mon, 25 Nov 2019 14:46:40 -0500	[thread overview]
Message-ID: <cover.1574709825.git.dennis@kernel.org> (raw)

Hello,

v3 [1] had 2 minor issues which are fixed:
 - I was generically dividing u64 which made 32 bit arches unhappy. [2]
 - Uninitialized use of trim_state local variable [3]

I've gone through and fixed the apparent u64 divisions which passes the
make.cross build provided on the end of the series.

This is based on btrfs-devel#misc-next e88411ecf657.

[1] https://lore.kernel.org/linux-btrfs/cover.1574282259.git.dennis@kernel.org/
[2] https://lore.kernel.org/linux-btrfs/201911230623.j5g9qeNZ%25lkp@intel.com/
[3] https://lore.kernel.org/linux-btrfs/CAKwvOdn5j37AYzmoOsaSqyYdBkjqevbTrSyGQypB+G_NgxX0fQ@mail.gmail.com/

diffstats below:

Dennis Zhou (22):
  bitmap: genericize percpu bitmap region iterators
  btrfs: rename DISCARD opt to DISCARD_SYNC
  btrfs: keep track of which extents have been discarded
  btrfs: keep track of cleanliness of the bitmap
  btrfs: add the beginning of async discard, discard workqueue
  btrfs: handle empty block_group removal
  btrfs: discard one region at a time in async discard
  btrfs: add removal calls for sysfs debug/
  btrfs: make UUID/debug have its own kobject
  btrfs: add discard sysfs directory
  btrfs: track discardable extents for async discard
  btrfs: keep track of discardable_bytes
  btrfs: calculate discard delay based on number of extents
  btrfs: add bps discard rate limit
  btrfs: limit max discard size for async discard
  btrfs: make max async discard size tunable
  btrfs: have multiple discard lists
  btrfs: only keep track of data extents for async discard
  btrfs: keep track of discard reuse stats
  btrfs: add async discard header
  btrfs: increase the metadata allowance for the free_space_cache
  btrfs: make smaller extents more likely to go into bitmaps

 fs/btrfs/Makefile           |   2 +-
 fs/btrfs/block-group.c      |  56 ++-
 fs/btrfs/block-group.h      |  30 ++
 fs/btrfs/ctree.h            |  52 ++-
 fs/btrfs/discard.c          | 680 ++++++++++++++++++++++++++++++++++++
 fs/btrfs/discard.h          |  46 +++
 fs/btrfs/disk-io.c          |  15 +-
 fs/btrfs/extent-tree.c      |  23 +-
 fs/btrfs/free-space-cache.c | 587 ++++++++++++++++++++++++++-----
 fs/btrfs/free-space-cache.h |  39 ++-
 fs/btrfs/inode-map.c        |  13 +-
 fs/btrfs/scrub.c            |   7 +-
 fs/btrfs/super.c            |  39 ++-
 fs/btrfs/sysfs.c            | 205 ++++++++++-
 include/linux/bitmap.h      |  35 ++
 mm/percpu.c                 |  61 +---
 16 files changed, 1737 insertions(+), 153 deletions(-)
 create mode 100644 fs/btrfs/discard.c
 create mode 100644 fs/btrfs/discard.h

Thanks,
Dennis