From: Qu Wenruo <wqu@suse.com>
To: linux-btrfs@vger.kernel.org
Subject: [PATCH 1/2] btrfs: relocation: Cleanup while() loop using for()
Date: Fri, 21 Sep 2018 14:45:20 +0800 [thread overview]
Message-ID: <20180921064521.13102-1-wqu@suse.com> (raw)
And add one line comment explaining what we're doing for each loop.
Signed-off-by: Qu Wenruo <wqu@suse.com>
---
fs/btrfs/relocation.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 8783a1776540..d7f5a11dde20 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -2997,27 +2997,25 @@ int relocate_tree_blocks(struct btrfs_trans_handle *trans,
goto out_free_blocks;
}
- rb_node = rb_first(blocks);
- while (rb_node) {
+ /* Kick in readahead for tree blocks with missing keys */
+ for (rb_node = rb_first(blocks); rb_node; rb_node = rb_next(rb_node)) {
block = rb_entry(rb_node, struct tree_block, rb_node);
if (!block->key_ready)
readahead_tree_block(fs_info, block->bytenr);
- rb_node = rb_next(rb_node);
}
- rb_node = rb_first(blocks);
- while (rb_node) {
+ /* Get first keys */
+ for (rb_node = rb_first(blocks); rb_node; rb_node = rb_next(rb_node)) {
block = rb_entry(rb_node, struct tree_block, rb_node);
if (!block->key_ready) {
err = get_tree_block_key(fs_info, block);
if (err)
goto out_free_path;
}
- rb_node = rb_next(rb_node);
}
- rb_node = rb_first(blocks);
- while (rb_node) {
+ /* Do tree relocation */
+ for (rb_node = rb_first(blocks); rb_node; rb_node = rb_next(rb_node)) {
block = rb_entry(rb_node, struct tree_block, rb_node);
node = build_backref_tree(rc, &block->key,
@@ -3034,7 +3032,6 @@ int relocate_tree_blocks(struct btrfs_trans_handle *trans,
err = ret;
goto out;
}
- rb_node = rb_next(rb_node);
}
out:
err = finish_pending_nodes(trans, rc, path, err);
--
2.19.0
next reply other threads:[~2018-09-21 12:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-21 6:45 Qu Wenruo [this message]
2018-09-21 6:45 ` [PATCH 2/2] btrfs: relocation: Remove redundant tree level check Qu Wenruo
2018-09-21 6:55 ` Nikolay Borisov
2018-09-21 6:53 ` [PATCH 1/2] btrfs: relocation: Cleanup while() loop using for() Nikolay Borisov
2018-09-21 6:56 ` Qu Wenruo
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=20180921064521.13102-1-wqu@suse.com \
--to=wqu@suse.com \
--cc=linux-btrfs@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).