[PATCH 0/2] btrfs: Allocate page arrays more efficiently.

Sweet Tea Dorminy
2022-03-28T20:14:35Z

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.

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/ctree.c | 32 ++++++++++++++++++++++++++++++
fs/btrfs/ctree.h | 2 ++
fs/btrfs/extent_io.c | 40 +++++++++++++++++++++++---------------
fs/btrfs/inode.c | 10 ++++------
fs/btrfs/raid56.c | 30 ++++------------------------
7 files changed, 85 insertions(+), 74 deletions(-)

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2.35.1