From: Filipe David Borba Manana <fdmanana@gmail.com>
To: linux-btrfs@vger.kernel.org
Cc: Filipe David Borba Manana <fdmanana@gmail.com>
Subject: [PATCH] Btrfs: remove unused wait queue in struct extent_buffer
Date: Mon, 16 Jun 2014 13:14:25 +0100 [thread overview]
Message-ID: <1402920865-3120-1-git-send-email-fdmanana@gmail.com> (raw)
The lock_wq wait queue is not used anywhere, therefore just remove it.
On a x86_64 system, this reduced sizeof(struct extent_buffer) from 320
bytes down to 296 bytes, which means a 4Kb page can now be used for
13 extent buffers instead of 12.
Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
---
fs/btrfs/extent_io.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 8b63f2d..dbbea4f 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -158,7 +158,6 @@ struct extent_buffer {
* to unlock
*/
wait_queue_head_t read_lock_wq;
- wait_queue_head_t lock_wq;
struct page *pages[INLINE_EXTENT_BUFFER_PAGES];
#ifdef CONFIG_BTRFS_DEBUG
struct list_head leak_list;
--
1.9.1
next reply other threads:[~2014-06-16 11:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-16 12:14 Filipe David Borba Manana [this message]
2014-06-17 5:02 ` [PATCH] Btrfs: remove unused wait queue in struct extent_buffer Satoru Takeuchi
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=1402920865-3120-1-git-send-email-fdmanana@gmail.com \
--to=fdmanana@gmail.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).