All of lore.kernel.org
 help / color / mirror / Atom feed
From: Tejun Heo <tj@kernel.org>
To: axboe@kernel.dk
Cc: jack@suse.cz, josef@toxicpanda.com, clm@fb.com, dsterba@suse.com,
	linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-btrfs@vger.kernel.org, kernel-team@fb.com,
	Tejun Heo <tj@kernel.org>
Subject: [PATCH 2/5] blkcg, writeback: Rename wbc_account_io() to wbc_account_cgroup_owner()
Date: Thu, 27 Jun 2019 13:39:49 -0700	[thread overview]
Message-ID: <20190627203952.386785-3-tj@kernel.org> (raw)
In-Reply-To: <20190627203952.386785-1-tj@kernel.org>

wbc_account_io() does a very specific job - try to see which cgroup is
actually dirtying an inode and transfer its ownership to the majority
dirtier if needed.  The name is too generic and confusing.  Let's
rename it to something more specific.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jan Kara <jack@suse.cz>
---
 Documentation/admin-guide/cgroup-v2.rst | 2 +-
 fs/btrfs/extent_io.c                    | 4 ++--
 fs/buffer.c                             | 2 +-
 fs/ext4/page-io.c                       | 2 +-
 fs/f2fs/data.c                          | 4 ++--
 fs/fs-writeback.c                       | 8 ++++----
 fs/mpage.c                              | 2 +-
 include/linux/writeback.h               | 8 ++++----
 8 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index cf88c1f98270..356a7a3dcb2f 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -2108,7 +2108,7 @@ following two functions.
 	a queue (device) has been associated with the bio and
 	before submission.
 
-  wbc_account_io(@wbc, @page, @bytes)
+  wbc_account_cgroup_owner(@wbc, @page, @bytes)
 	Should be called for each data segment being written out.
 	While this function doesn't care exactly when it's called
 	during the writeback session, it's the easiest and most
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index db337e53aab3..5106008f5e28 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2911,7 +2911,7 @@ static int submit_extent_page(unsigned int opf, struct extent_io_tree *tree,
 			bio = NULL;
 		} else {
 			if (wbc)
-				wbc_account_io(wbc, page, page_size);
+				wbc_account_cgroup_owner(wbc, page, page_size);
 			return 0;
 		}
 	}
@@ -2924,7 +2924,7 @@ static int submit_extent_page(unsigned int opf, struct extent_io_tree *tree,
 	bio->bi_opf = opf;
 	if (wbc) {
 		wbc_init_bio(wbc, bio);
-		wbc_account_io(wbc, page, page_size);
+		wbc_account_cgroup_owner(wbc, page, page_size);
 	}
 
 	*bio_ret = bio;
diff --git a/fs/buffer.c b/fs/buffer.c
index e450c55f6434..40547bbbea94 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3093,7 +3093,7 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
 
 	if (wbc) {
 		wbc_init_bio(wbc, bio);
-		wbc_account_io(wbc, bh->b_page, bh->b_size);
+		wbc_account_cgroup_owner(wbc, bh->b_page, bh->b_size);
 	}
 
 	submit_bio(bio);
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 4690618a92e9..56e287f5ee50 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -404,7 +404,7 @@ static int io_submit_add_bh(struct ext4_io_submit *io,
 	ret = bio_add_page(io->io_bio, page, bh->b_size, bh_offset(bh));
 	if (ret != bh->b_size)
 		goto submit_and_retry;
-	wbc_account_io(io->io_wbc, page, bh->b_size);
+	wbc_account_cgroup_owner(io->io_wbc, page, bh->b_size);
 	io->io_next_block++;
 	return 0;
 }
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index eda4181d2092..e1cab1717ac7 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -470,7 +470,7 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
 	}
 
 	if (fio->io_wbc && !is_read_io(fio->op))
-		wbc_account_io(fio->io_wbc, page, PAGE_SIZE);
+		wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
 
 	bio_set_op_attrs(bio, fio->op, fio->op_flags);
 
@@ -537,7 +537,7 @@ void f2fs_submit_page_write(struct f2fs_io_info *fio)
 	}
 
 	if (fio->io_wbc)
-		wbc_account_io(fio->io_wbc, bio_page, PAGE_SIZE);
+		wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE);
 
 	io->last_block_in_bio = fio->new_blkaddr;
 	f2fs_trace_ios(fio, 0);
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index a8a40bc26c2f..0aef79e934bb 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -706,7 +706,7 @@ void wbc_detach_inode(struct writeback_control *wbc)
 EXPORT_SYMBOL_GPL(wbc_detach_inode);
 
 /**
- * wbc_account_io - account IO issued during writeback
+ * wbc_account_cgroup_owner - account writeback to update inode cgroup ownership
  * @wbc: writeback_control of the writeback in progress
  * @page: page being written out
  * @bytes: number of bytes being written out
@@ -715,8 +715,8 @@ EXPORT_SYMBOL_GPL(wbc_detach_inode);
  * controlled by @wbc.  Keep the book for foreign inode detection.  See
  * wbc_detach_inode().
  */
-void wbc_account_io(struct writeback_control *wbc, struct page *page,
-		    size_t bytes)
+void wbc_account_cgroup_owner(struct writeback_control *wbc, struct page *page,
+			      size_t bytes)
 {
 	struct cgroup_subsys_state *css;
 	int id;
@@ -753,7 +753,7 @@ void wbc_account_io(struct writeback_control *wbc, struct page *page,
 	else
 		wbc->wb_tcand_bytes -= min(bytes, wbc->wb_tcand_bytes);
 }
-EXPORT_SYMBOL_GPL(wbc_account_io);
+EXPORT_SYMBOL_GPL(wbc_account_cgroup_owner);
 
 /**
  * inode_congested - test whether an inode is congested
diff --git a/fs/mpage.c b/fs/mpage.c
index 436a85260394..a63620cdb73a 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -647,7 +647,7 @@ static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
 	 * the confused fail path above (OOM) will be very confused when
 	 * it finds all bh marked clean (i.e. it will not write anything)
 	 */
-	wbc_account_io(wbc, page, PAGE_SIZE);
+	wbc_account_cgroup_owner(wbc, page, PAGE_SIZE);
 	length = first_unmapped << blkbits;
 	if (bio_add_page(bio, page, length, 0) < length) {
 		bio = mpage_bio_submit(REQ_OP_WRITE, op_flags, bio);
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 738a0c24874f..dda5cf228172 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -188,8 +188,8 @@ void wbc_attach_and_unlock_inode(struct writeback_control *wbc,
 				 struct inode *inode)
 	__releases(&inode->i_lock);
 void wbc_detach_inode(struct writeback_control *wbc);
-void wbc_account_io(struct writeback_control *wbc, struct page *page,
-		    size_t bytes);
+void wbc_account_cgroup_owner(struct writeback_control *wbc, struct page *page,
+			      size_t bytes);
 void cgroup_writeback_umount(void);
 
 /**
@@ -291,8 +291,8 @@ static inline void wbc_init_bio(struct writeback_control *wbc, struct bio *bio)
 {
 }
 
-static inline void wbc_account_io(struct writeback_control *wbc,
-				  struct page *page, size_t bytes)
+static inline void wbc_account_cgroup_owner(struct writeback_control *wbc,
+					    struct page *page, size_t bytes)
 {
 }
 
-- 
2.17.1


  parent reply	other threads:[~2019-06-27 20:40 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-27 20:39 [PATCHSET for-5.3/block] block: add blkcg bio punt mechanism Tejun Heo
2019-06-27 20:39 ` [PATCH 1/5] cgroup, blkcg: Prepare some symbols for module and !CONFIG_CGROUP usages Tejun Heo
2019-06-27 20:39 ` Tejun Heo [this message]
2019-07-10 10:54   ` [PATCH 2/5] blkcg, writeback: Rename wbc_account_io() to wbc_account_cgroup_owner() Jan Kara
2019-06-27 20:39 ` [PATCH 3/5] blkcg, writeback: Add wbc->no_cgroup_owner Tejun Heo
2019-06-27 20:39 ` [PATCH 4/5] blkcg, writeback: Implement wbc_blkcg_css() Tejun Heo
2019-06-27 20:39 ` [PATCH 5/5] blkcg: implement REQ_CGROUP_PUNT Tejun Heo
2019-07-10 13:53 ` [PATCHSET for-5.3/block] block: add blkcg bio punt mechanism Jens Axboe

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=20190627203952.386785-3-tj@kernel.org \
    --to=tj@kernel.org \
    --cc=axboe@kernel.dk \
    --cc=clm@fb.com \
    --cc=dsterba@suse.com \
    --cc=jack@suse.cz \
    --cc=josef@toxicpanda.com \
    --cc=kernel-team@fb.com \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-btrfs@vger.kernel.org \
    --cc=linux-kernel@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.