[v4] Implement readahead for squashfs

[PATCH v4 0/3] Implement readahead for squashfs

Hsin-Yi Wang posted 3 patches 3 years, 11 months ago

Diff against v1 v1 v2 v3 v5 v6 v7
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There is a newer version of this series

fs/squashfs/Makefile     |  4 +-
fs/squashfs/file.c       | 97 +++++++++++++++++++++++++++++++++++++++-
fs/squashfs/page_actor.h | 41 -----------------
fs/squashfs/super.c      | 33 --------------
4 files changed, 98 insertions(+), 77 deletions(-)

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[PATCH v4 0/3] Implement readahead for squashfs

Posted by Hsin-Yi Wang 3 years, 11 months ago

Commit c1f6925e1091("mm: put readahead pages in cache earlier") requires
fs to implement readahead callback. Otherwise there will be a
performance regression.

Commit 9eec1d897139("squashfs: provide backing_dev_info in order to
disable read-ahead") mitigates the performance drop issue for squashfs
by closing readahead for it.

This series implements readahead callback for squashfs. The previous
discussion are in [1] and [2].

[1] https://lore.kernel.org/all/CAJMQK-g9G6KQmH-V=BRGX0swZji9Wxe_2c7ht-MMAapdFy2pXw@mail.gmail.com/T/
[2] https://lore.kernel.org/linux-mm/Yn5Yij9pRPCzDozt@casper.infradead.org/t/#m4af4473b94f98a4996cb11756b633a07e5e059d1

Hsin-Yi Wang (2):
  Revert "squashfs: provide backing_dev_info in order to disable
    read-ahead"
  squashfs: implement readahead

Phillip Lougher (1):
  squashfs: always build "file direct" version of page actor

 fs/squashfs/Makefile     |  4 +-
 fs/squashfs/file.c       | 97 +++++++++++++++++++++++++++++++++++++++-
 fs/squashfs/page_actor.h | 41 -----------------
 fs/squashfs/super.c      | 33 --------------
 4 files changed, 98 insertions(+), 77 deletions(-)

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