From: Christoph Hellwig <hch@infradead.org>
To: Brian Foster <bfoster@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>, linux-xfs@vger.kernel.org
Subject: Re: [PATCH v2 3/5] xfs: reuse iomap delalloc code for COW fork reservation
Date: Mon, 16 Jan 2017 09:37:30 -0800 [thread overview]
Message-ID: <20170116173730.GA11796@infradead.org> (raw)
In-Reply-To: <20170116162601.GB6302@bfoster.bfoster>
On Mon, Jan 16, 2017 at 11:26:01AM -0500, Brian Foster wrote:
> IMO, patches 1-3 stand on their own as cleanup/refactor patches,
> regardless of whether we want the actual speculative preallocation patch
> (in current form or at all). xfs_reflink_reserve_cow() is mostly a
> copy&paste of _iomap_begin_delay() operating on the cow fork rather than
> the data fork, so technically we really shouldn't have a need for a
> feature specific helper. Duplication aside, I also find the code a bit
> confusing to follow in that we have to traverse through several
> functions in "do nothing" cases such as non-shared blocks of a reflinked
> file.
I'm usually not a fan of refactor patches that adds lots of new code
without adding functionality. In terms of readability I'm obviously
biasses having written a lot of the code, but I find the new code
much harder to read.
next prev parent reply other threads:[~2017-01-16 17:37 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-11 17:54 [PATCH v2 0/5] xfs: basic cow fork speculative preallocation Brian Foster
2017-01-11 17:54 ` [PATCH v2 1/5] xfs: refactor iomap delalloc existing extent search into helper Brian Foster
2017-01-11 17:54 ` [PATCH v2 2/5] xfs: logically separate iomap range from allocation range Brian Foster
2017-01-11 17:54 ` [PATCH v2 3/5] xfs: reuse iomap delalloc code for COW fork reservation Brian Foster
2017-01-13 17:13 ` Christoph Hellwig
2017-01-16 16:26 ` Brian Foster
2017-01-16 17:37 ` Christoph Hellwig [this message]
2017-01-16 19:04 ` Brian Foster
2017-01-11 17:54 ` [PATCH v2 4/5] xfs: free cowblocks and retry on buffered write ENOSPC Brian Foster
2017-01-13 17:12 ` Christoph Hellwig
2017-01-11 17:54 ` [PATCH v2 5/5] xfs: implement basic COW fork speculative preallocation Brian Foster
2017-01-13 17:13 ` [PATCH v2 0/5] xfs: basic cow " Christoph Hellwig
2017-01-16 16:26 ` Brian Foster
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170116173730.GA11796@infradead.org \
--to=hch@infradead.org \
--cc=bfoster@redhat.com \
--cc=linux-xfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).