diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index dcaf556..aa02eab 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -46,6 +46,10 @@
 #include "check-integrity.h"
 #include "rcu-string.h"
 
+#ifdef CONFIG_X86
+#include <asm/cpufeature.h>
+#endif
+
 static struct extent_io_ops btree_extent_io_ops;
 static void end_workqueue_fn(struct btrfs_work *work);
 static void free_fs_root(struct btrfs_root *root);
@@ -859,10 +863,22 @@
 	return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1);
 }
 
+static int check_async_write(struct inode *inode, unsigned long bio_flags)
+{
+	if (bio_flags & EXTENT_BIO_TREE_LOG)
+		return 0;
+#ifdef CONFIG_X86
+	if (cpu_has_xmm4_2)
+		return 0;
+#endif
+	return 1;
+}
+
 static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
 				 int mirror_num, unsigned long bio_flags,
 				 u64 bio_offset)
 {
+	int async = check_async_write(inode, bio_flags);
 	int ret;
 
 	if (!(rw & REQ_WRITE)) {
@@ -877,6 +893,12 @@
 			return ret;
 		return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
 				     mirror_num, 0);
+	} else if (!async) {
+		ret = btree_csum_one_bio(bio);
+		if (ret)
+			return ret;
+		return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
+				     mirror_num, 0);
 	}
 
 	/*
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index a2c2157..979fa0d 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -45,6 +45,7 @@
 	struct bio *bio;
 	struct extent_io_tree *tree;
 	get_extent_t *get_extent;
+	unsigned long bio_flags;
 
 	/* tells writepage not to lock the state bits for this range
 	 * it still does the unlocking
@@ -3163,12 +3164,16 @@
 	struct block_device *bdev = fs_info->fs_devices->latest_bdev;
 	u64 offset = eb->start;
 	unsigned long i, num_pages;
+	unsigned long bio_flags = 0;
 	int rw = (epd->sync_io ? WRITE_SYNC : WRITE);
 	int ret = 0;
 
 	clear_bit(EXTENT_BUFFER_IOERR, &eb->bflags);
 	num_pages = num_extent_pages(eb->start, eb->len);
 	atomic_set(&eb->io_pages, num_pages);
+	if (btrfs_header_owner(eb) == BTRFS_TREE_LOG_OBJECTID)
+		bio_flags = EXTENT_BIO_TREE_LOG;
+
 	for (i = 0; i < num_pages; i++) {
 		struct page *p = extent_buffer_page(eb, i);
 
@@ -3177,7 +3182,8 @@
 		ret = submit_extent_page(rw, eb->tree, p, offset >> 9,
 					 PAGE_CACHE_SIZE, 0, bdev, &epd->bio,
 					 -1, end_bio_extent_buffer_writepage,
-					 0, 0, 0);
+					 0, epd->bio_flags, bio_flags);
+		epd->bio_flags = bio_flags;
 		if (ret) {
 			set_bit(EXTENT_BUFFER_IOERR, &eb->bflags);
 			SetPageError(p);
@@ -3212,6 +3218,7 @@
 		.tree = tree,
 		.extent_locked = 0,
 		.sync_io = wbc->sync_mode == WB_SYNC_ALL,
+		.bio_flags = 0,
 	};
 	int ret = 0;
 	int done = 0;
@@ -3474,7 +3481,7 @@
 		if (epd->sync_io)
 			rw = WRITE_SYNC;
 
-		ret = submit_one_bio(rw, epd->bio, 0, 0);
+		ret = submit_one_bio(rw, epd->bio, 0, epd->bio_flags);
 		BUG_ON(ret < 0); /* -ENOMEM */
 		epd->bio = NULL;
 	}
@@ -3497,6 +3504,7 @@
 		.get_extent = get_extent,
 		.extent_locked = 0,
 		.sync_io = wbc->sync_mode == WB_SYNC_ALL,
+		.bio_flags = 0,
 	};
 
 	ret = __extent_writepage(page, wbc, &epd);
@@ -3521,6 +3529,7 @@
 		.get_extent = get_extent,
 		.extent_locked = 1,
 		.sync_io = mode == WB_SYNC_ALL,
+		.bio_flags = 0,
 	};
 	struct writeback_control wbc_writepages = {
 		.sync_mode	= mode,
@@ -3560,6 +3569,7 @@
 		.get_extent = get_extent,
 		.extent_locked = 0,
 		.sync_io = wbc->sync_mode == WB_SYNC_ALL,
+		.bio_flags = 0,
 	};
 
 	ret = extent_write_cache_pages(tree, mapping, wbc,
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 512f8da..a69dea2 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -27,6 +27,7 @@
  * type for this bio
  */
 #define EXTENT_BIO_COMPRESSED 1
+#define EXTENT_BIO_TREE_LOG 2
 #define EXTENT_BIO_FLAG_SHIFT 16
 
 /* these are bit numbers for test/set bit */