linux-kernel - [PATCH] orangefs: call op_release sooner when creating inodes

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Message-Id: <20171110170801.13816-1-martin@omnibond.com>
Date:   Fri, 10 Nov 2017 12:08:01 -0500
From:   Martin Brandenburg <martin@...ibond.com>
To:     hubcap@...ibond.com, devel@...ts.orangefs.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Martin Brandenburg <martin@...ibond.com>
Subject: [PATCH] orangefs: call op_release sooner when creating inodes

Prevents holding an unnecessary op while the kernel processes another op
and yields the CPU.

Signed-off-by: Martin Brandenburg <martin@...ibond.com>
---
 fs/orangefs/namei.c | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/fs/orangefs/namei.c b/fs/orangefs/namei.c
index d798b4cd1b23..957a69db800d 100644
--- a/fs/orangefs/namei.c
+++ b/fs/orangefs/namei.c
@@ -21,6 +21,7 @@ static int orangefs_create(struct inode *dir,
 {
 	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
 	struct orangefs_kernel_op_s *new_op;
+	struct orangefs_object_kref ref;
 	struct inode *inode;
 	struct iattr iattr;
 	int ret;
@@ -55,8 +56,10 @@ static int orangefs_create(struct inode *dir,
 	if (ret < 0)
 		goto out;
 
-	inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0,
-				&new_op->downcall.resp.create.refn);
+	ref = new_op->downcall.resp.create.refn;
+	op_release(new_op);
+
+	inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0, &ref);
 	if (IS_ERR(inode)) {
 		gossip_err("%s: Failed to allocate inode for file :%pd:\n",
 			   __func__,
@@ -89,7 +92,6 @@ static int orangefs_create(struct inode *dir,
 	mark_inode_dirty_sync(dir);
 	ret = 0;
 out:
-	op_release(new_op);
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s: %pd: returning %d\n",
 		     __func__,
@@ -271,6 +273,7 @@ static int orangefs_symlink(struct inode *dir,
 {
 	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
 	struct orangefs_kernel_op_s *new_op;
+	struct orangefs_object_kref ref;
 	struct inode *inode;
 	struct iattr iattr;
 	int mode = 755;
@@ -313,8 +316,10 @@ static int orangefs_symlink(struct inode *dir,
 		goto out;
 	}
 
-	inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0,
-				&new_op->downcall.resp.sym.refn);
+	ref = new_op->downcall.resp.sym.refn;
+	op_release(new_op);
+
+	inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0, &ref);
 	if (IS_ERR(inode)) {
 		gossip_err
 		    ("*** Failed to allocate orangefs symlink inode\n");
@@ -344,7 +349,6 @@ static int orangefs_symlink(struct inode *dir,
 	mark_inode_dirty_sync(dir);
 	ret = 0;
 out:
-	op_release(new_op);
 	return ret;
 }
 
@@ -352,6 +356,7 @@ static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
 {
 	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
 	struct orangefs_kernel_op_s *new_op;
+	struct orangefs_object_kref ref;
 	struct inode *inode;
 	struct iattr iattr;
 	int ret;
@@ -382,8 +387,10 @@ static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
 		goto out;
 	}
 
-	inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0,
-				&new_op->downcall.resp.mkdir.refn);
+	ref = new_op->downcall.resp.mkdir.refn;
+	op_release(new_op);
+
+	inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0, &ref);
 	if (IS_ERR(inode)) {
 		gossip_err("*** Failed to allocate orangefs dir inode\n");
 		ret = PTR_ERR(inode);
@@ -415,7 +422,6 @@ static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
 	orangefs_inode_setattr(dir, &iattr);
 	mark_inode_dirty_sync(dir);
 out:
-	op_release(new_op);
 	return ret;
 }
 
-- 
2.15.0