[PATCH v2 0/2] btrfs: allocate page arrays more efficiently

From: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
To: Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
	David Sterba <dsterba@suse.com>, Nick Terrell <terrelln@fb.com>,
	linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org,
	kernel-team@fb.com
Cc: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
Subject: [PATCH v2 0/2] btrfs: allocate page arrays more efficiently
Date: Wed, 30 Mar 2022 12:44:05 -0400	[thread overview]
Message-ID: <cover.1648658235.git.sweettea-kernel@dorminy.me> (raw)

In several places, btrfs allocates an array of pages, one at a time.  In
addition to duplicating code, the mm subsystem provides a helper to
allocate multiple pages at once into an array which is suited for our
usecase. In the fast path, the batching can result in better allocation
decisions and less locking. This changeset first adjusts the users to
call a common array-of-pages allocation function, then adjusts that
common function to use the batch page allocator.

v2: moved new helper to extent_io.[ch]. Fixed title format.
v1: https://lore.kernel.org/linux-btrfs/cover.1648496453.git.sweettea-kernel@dorminy.me/

Sweet Tea Dorminy (2):
  btrfs: factor out allocating an array of pages
  btrfs: allocate page arrays using bulk page allocator

 fs/btrfs/check-integrity.c |  8 ++---
 fs/btrfs/compression.c     | 37 +++++++++-----------
 fs/btrfs/extent_io.c       | 72 +++++++++++++++++++++++++++++---------
 fs/btrfs/extent_io.h       |  2 ++
 fs/btrfs/inode.c           | 10 +++---
 fs/btrfs/raid56.c          | 30 +++-------------
 6 files changed, 85 insertions(+), 74 deletions(-)

-- 
2.35.1