Btrfs: Add mount -o ssd, which includes optimizations for seek free storage

[linux-2.6-block.git] / fs / btrfs / disk-io.c

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 731a534f81f561de58c6fdd97d14448b2ac8f9d6..5d1f9bca271232d95e36b2e81b4e57f8cdc6d934 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -193,6 +193,7 @@ int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
        }
        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 @@ struct btrfs_root *open_ctree(struct super_block *sb)
        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