Btrfs: Add mount -o ssd, which includes optimizations for seek free storage
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 731a534..5d1f9bc 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -193,6 +193,7 @@
}
eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS);
read_extent_buffer_pages(tree, eb, start + PAGE_CACHE_SIZE, 1);
+ btrfs_clear_buffer_defrag(eb);
found_start = btrfs_header_bytenr(eb);
if (found_start != start) {
printk("warning: eb start incorrect %Lu buffer %Lu len %lu\n",
@@ -676,6 +677,8 @@
fs_info->do_barriers = 1;
fs_info->closing = 0;
fs_info->total_pinned = 0;
+ fs_info->last_alloc = 0;
+
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
INIT_WORK(&fs_info->trans_work, btrfs_transaction_cleaner, fs_info);
#else