NFS: Reduce lock contention in nfs_try_to_update_request() (1403390d) · Commits · 戴 / test

fs/nfs/write.c

+3 −5

Original line number	Diff line number	Diff line
		@@ -1097,13 +1097,12 @@ static struct nfs_page nfs_try_to_update_request(struct inode inode,
		unsigned int end;
		int error;

		if (!PagePrivate(page))
		return NULL;

		end = offset + bytes;
		spin_lock(&inode->i_lock);

		for (;;) {
		if (!(PagePrivate(page) \|\| PageSwapCache(page)))
		return NULL;
		spin_lock(&inode->i_lock);
		req = nfs_page_find_head_request_locked(NFS_I(inode), page);
		if (req == NULL)
		goto out_unlock;
		@@ -1132,7 +1131,6 @@ static struct nfs_page nfs_try_to_update_request(struct inode inode,
		nfs_release_request(req);
		if (error != 0)
		goto out_err;
		spin_lock(&inode->i_lock);
		}

		/* Okay, the request matches. Update the region */