linux-ext4 - [PATCH 0/3] ext4 fast commit API cleanup

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Message-Id: <20211220031704.441727-1-harshads@google.com>
Date:   Sun, 19 Dec 2021 19:17:01 -0800
From:   Harshad Shirwadkar <harshadshirwadkar@...il.com>
To:     linux-ext4@...r.kernel.org
Cc:     yinxin.x@...edance.com, enwlinux@...il.com,
        Harshad Shirwadkar <harshads@...gle.com>,
        Harshad Shirwadkar <harshadshirwadkar@...il.com>
Subject: [PATCH 0/3] ext4 fast commit API cleanup

ext4: fast commit API cleanup

This patch series fixes up fast commit APIs. There are NO on-disk
format changes introduced in this series. The main contribution of the
series is that it drops fast commit specific transaction APIs and
makes fast commits work with journal transaction APIs of JBD2
journalling system. With these changes, a fast commit eligible
transaction is simply enclosed in calls to "jbd2_journal_start()" and
"jbd2_journal_stop()". If the update that is being performed is fast
commit ineligible, one must simply call ext4_fc_mark_ineligible()
after starting a transaction using "jbd2_journal_start()". The last
patch in the series simplifies fast commit stats recording by moving
it to a different function.

I verified that the patch series introduces no regressions in "quick"
and "log" groups when "fast_commit" feature is enabled.

Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@...il.com>

Harshad Shirwadkar (3):
  ext4: drop transaction start stop APIs for fast commit
  ext4: drop ineligible txn start stop APIs
  ext4: simplify updating of fast commit stats

 fs/ext4/acl.c         |   2 -
 fs/ext4/ext4.h        |  12 +-
 fs/ext4/extents.c     |   9 +-
 fs/ext4/fast_commit.c | 250 ++++++++++++------------------------------
 fs/ext4/fast_commit.h |  27 ++---
 fs/ext4/file.c        |   4 -
 fs/ext4/inode.c       |   7 +-
 fs/ext4/ioctl.c       |  13 +--
 fs/ext4/super.c       |   1 -
 fs/jbd2/journal.c     |   2 +
 10 files changed, 96 insertions(+), 231 deletions(-)

-- 
2.34.1.173.g76aa8bc2d0-goog