From: Jan Kara <jack@suse.cz>
To: harshad shirwadkar <harshadshirwadkar@gmail.com>
Cc: Jan Kara <jack@suse.cz>,
Ext4 Developers List <linux-ext4@vger.kernel.org>,
"Theodore Y. Ts'o" <tytso@mit.edu>
Subject: Re: [PATCH v10 1/9] doc: update ext4 and journalling docs to include fast commit feature
Date: Thu, 22 Oct 2020 15:06:16 +0200 [thread overview]
Message-ID: <20201022130616.GC24163@quack2.suse.cz> (raw)
In-Reply-To: <CAD+ocbyp1PBS-GeU4r75DBE-r15HT6PJSk_t0zordFv3hH2Fjg@mail.gmail.com>
On Wed 21-10-20 10:25:14, harshad shirwadkar wrote:
> > BTW, how is EXT4_FC_TAG_CREAT different from EXT4_FC_TAG_LINK? It seems
> > like they describe essentially the same operation?
> In the replay path, creat has to do certain things that link doesn't.
> For example, "creat" needs to mark the inode as used in the bitmap and
> also if it's a directory that's being created, it needs to initialize
> the "." and ".." dirents in the directory. That's why we need
> different tags.
Aha, OK, makes sence. Thanks for explanation. BTW it would be good to have
some documentation (or at least examples) how a sequence of system calls
translates to fastcommit log entries and then how these are replayed in
case of crash.
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
next prev parent reply other threads:[~2020-10-22 13:06 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-15 20:37 [PATCH v10 0/9] Add fast commits in Ext4 file system Harshad Shirwadkar
2020-10-15 20:37 ` [PATCH v10 1/9] doc: update ext4 and journalling docs to include fast commit feature Harshad Shirwadkar
2020-10-21 16:04 ` Jan Kara
2020-10-21 17:25 ` harshad shirwadkar
2020-10-22 13:06 ` Jan Kara [this message]
2020-10-15 20:37 ` [PATCH v10 2/9] ext4: add fast_commit feature and handling for extended mount options Harshad Shirwadkar
2020-10-21 16:18 ` Jan Kara
2020-10-21 17:31 ` harshad shirwadkar
2020-10-22 13:09 ` Jan Kara
2020-10-26 16:40 ` harshad shirwadkar
2020-10-15 20:37 ` [PATCH v10 3/9] ext4 / jbd2: add fast commit initialization Harshad Shirwadkar
2020-10-21 20:00 ` Jan Kara
2020-10-29 23:28 ` harshad shirwadkar
2020-10-30 15:40 ` Jan Kara
2020-10-15 20:37 ` [PATCH v10 4/9] jbd2: add fast commit machinery Harshad Shirwadkar
2020-10-22 10:16 ` Jan Kara
2020-10-23 17:17 ` harshad shirwadkar
2020-10-26 9:03 ` Jan Kara
2020-10-26 16:34 ` harshad shirwadkar
2020-10-15 20:37 ` [PATCH v10 5/9] ext4: main fast-commit commit path Harshad Shirwadkar
2020-10-23 10:30 ` Jan Kara
2020-10-26 20:55 ` harshad shirwadkar
2020-10-27 14:29 ` Jan Kara
2020-10-27 17:38 ` harshad shirwadkar
2020-10-30 15:28 ` Jan Kara
2020-10-30 16:45 ` harshad shirwadkar
2020-11-03 10:04 ` Jan Kara
2020-11-03 18:31 ` harshad shirwadkar
2020-10-27 18:45 ` Theodore Y. Ts'o
2020-10-15 20:37 ` [PATCH v10 6/9] jbd2: fast commit recovery path Harshad Shirwadkar
2020-10-15 20:37 ` [PATCH v10 7/9] ext4: " Harshad Shirwadkar
2020-10-15 20:38 ` [PATCH v10 8/9] ext4: add a mount opt to forcefully turn fast commits on Harshad Shirwadkar
2020-10-15 20:38 ` [PATCH v10 9/9] ext4: add fast commit stats in procfs Harshad Shirwadkar
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