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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <cover.1648658235.git.sweettea-kernel@dorminy.me>
Date:   Wed, 30 Mar 2022 12:44:05 -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 v2 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.

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