linux-kernel - [PATCH v6 0/2] btrfs: Don't block system suspend during fstrim

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Message-ID: <20240917203346.9670-1-luca.stefani.ge1@gmail.com>
Date: Tue, 17 Sep 2024 22:33:03 +0200
From: Luca Stefani <luca.stefani.ge1@...il.com>
To: 
Cc: Luca Stefani <luca.stefani.ge1@...il.com>,
	Chris Mason <clm@...com>,
	Josef Bacik <josef@...icpanda.com>,
	David Sterba <dsterba@...e.com>,
	linux-btrfs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v6 0/2] btrfs: Don't block system suspend during fstrim

Changes since v5:
* Make chunk size a define
* Remove superfluous trim_interrupted checks
  after moving them to trim_no_bitmap/trim_bitmaps

Changes since v4:
* Set chunk size to 1G
* Set proper error return codes in case of interruption
* Dropped fstrim_range fixup as pulled in -next

Changes since v3:
* Went back to manual chunk size

Changes since v2:
* Use blk_alloc_discard_bio directly
* Reset ret to ERESTARTSYS

Changes since v1:
* Use bio_discard_limit to calculate chunk size
* Makes use of the split chunks

Original discussion: https://lore.kernel.org/lkml/20240822164908.4957-1-luca.stefani.ge1@gmail.com/
v1: https://lore.kernel.org/lkml/20240902114303.922472-1-luca.stefani.ge1@gmail.com/
v2: https://lore.kernel.org/lkml/20240902205828.943155-1-luca.stefani.ge1@gmail.com/
v3: https://lore.kernel.org/lkml/20240903071625.957275-4-luca.stefani.ge1@gmail.com/
v4: https://lore.kernel.org/lkml/20240916101615.116164-1-luca.stefani.ge1@gmail.com/
v5: https://lore.kernel.org/lkml/20240916125707.127118-1-luca.stefani.ge1@gmail.com/

---

NB: I didn't change btrfs_discard_workfn yet to add error checks
as I don't know what semantics we should have in that case.
The work queue is always re-scheduled and created with WQ_FREEZABLE
so it should be automatically frozen. Shall I simply add some logs?

---

Luca Stefani (2):
  btrfs: Split remaining space to discard in chunks
  btrfs: Don't block system suspend during fstrim

 fs/btrfs/extent-tree.c      | 26 +++++++++++++++++++++-----
 fs/btrfs/free-space-cache.c |  4 ++--
 fs/btrfs/free-space-cache.h |  6 ++++++
 fs/btrfs/volumes.h          |  1 +
 4 files changed, 30 insertions(+), 7 deletions(-)

-- 
2.46.0