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Message-Id: <20201106035911.1942128-15-harshadshirwadkar@gmail.com> Date: Thu, 5 Nov 2020 19:59:03 -0800 From: Harshad Shirwadkar <harshadshirwadkar@...il.com> To: linux-ext4@...r.kernel.org Cc: tytso@....edu, Harshad Shirwadkar <harshadshirwadkar@...il.com> Subject: [PATCH v2 14/22] ext4: fix code documentatioon Add a TODO to remember fixing REQ_FUA | REQ_PREFLUSH for fast commit buffers. Also, fix a typo in top level comment in fast_commit.c Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@...il.com> --- fs/ext4/fast_commit.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/ext4/fast_commit.c b/fs/ext4/fast_commit.c index fc5a5e6a581d..639b2a308c7b 100644 --- a/fs/ext4/fast_commit.c +++ b/fs/ext4/fast_commit.c @@ -83,7 +83,7 @@ * * Atomicity of commits * -------------------- - * In order to gaurantee atomicity during the commit operation, fast commit + * In order to guarantee atomicity during the commit operation, fast commit * uses "EXT4_FC_TAG_TAIL" tag that marks a fast commit as complete. Tail * tag contains CRC of the contents and TID of the transaction after which * this fast commit should be applied. Recovery code replays fast commit @@ -542,6 +542,7 @@ static void ext4_fc_submit_bh(struct super_block *sb) int write_flags = REQ_SYNC; struct buffer_head *bh = EXT4_SB(sb)->s_fc_bh; + /* TODO: REQ_FUA | REQ_PREFLUSH is unnecessarily expensive. */ if (test_opt(sb, BARRIER)) write_flags |= REQ_FUA | REQ_PREFLUSH; lock_buffer(bh); -- 2.29.1.341.ge80a0c044ae-goog
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