linux-kernel - [PATCH v3 0/2] btrfs: allocate page arrays more efficiently

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Message-Id: <cover.1648669832.git.sweettea-kernel@dorminy.me>
Date:   Wed, 30 Mar 2022 16:11:21 -0400
From:   Sweet Tea Dorminy <sweettea-kernel@...miny.me>
To:     Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>,
        Nick Terrell <terrelln@...com>, linux-kernel@...r.kernel.org,
        linux-btrfs@...r.kernel.org, kernel-team@...com
Cc:     Sweet Tea Dorminy <sweettea-kernel@...miny.me>
Subject: [PATCH v3 0/2] btrfs: allocate page arrays more efficiently

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.

v3:
 - fixed up the other style comments from kdave's v1 comments
v2:
 - moved new helper to extent_io.[ch]; fixed title format
 - https://lore.kernel.org/linux-btrfs/cover.1648658235.git.sweettea-kernel@dorminy.me/ 
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     | 39 +++++++++------------
 fs/btrfs/extent_io.c       | 71 +++++++++++++++++++++++++++++---------
 fs/btrfs/extent_io.h       |  2 ++
 fs/btrfs/inode.c           | 10 +++---
 fs/btrfs/raid56.c          | 30 +++-------------
 6 files changed, 85 insertions(+), 75 deletions(-)

-- 
2.35.1