]> nv-tegra.nvidia Code Review - linux-2.6.git/blobdiff - fs/btrfs/disk-io.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs...
[linux-2.6.git] / fs / btrfs / disk-io.c
index e83be2e4602c256f959a2b9daf0c3da2b8e9bcab..253da7e01ab3e9e4f4c0a223096fb6dd97b72fcf 100644 (file)
@@ -123,15 +123,15 @@ static struct extent_map *btree_get_extent(struct inode *inode,
        struct extent_map *em;
        int ret;
 
-       spin_lock(&em_tree->lock);
+       read_lock(&em_tree->lock);
        em = lookup_extent_mapping(em_tree, start, len);
        if (em) {
                em->bdev =
                        BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev;
-               spin_unlock(&em_tree->lock);
+               read_unlock(&em_tree->lock);
                goto out;
        }
-       spin_unlock(&em_tree->lock);
+       read_unlock(&em_tree->lock);
 
        em = alloc_extent_map(GFP_NOFS);
        if (!em) {
@@ -144,7 +144,7 @@ static struct extent_map *btree_get_extent(struct inode *inode,
        em->block_start = 0;
        em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev;
 
-       spin_lock(&em_tree->lock);
+       write_lock(&em_tree->lock);
        ret = add_extent_mapping(em_tree, em);
        if (ret == -EEXIST) {
                u64 failed_start = em->start;
@@ -163,7 +163,7 @@ static struct extent_map *btree_get_extent(struct inode *inode,
                free_extent_map(em);
                em = NULL;
        }
-       spin_unlock(&em_tree->lock);
+       write_unlock(&em_tree->lock);
 
        if (ret)
                em = ERR_PTR(ret);
@@ -1325,9 +1325,9 @@ static void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
        offset = page_offset(page);
 
        em_tree = &BTRFS_I(inode)->extent_tree;
-       spin_lock(&em_tree->lock);
+       read_lock(&em_tree->lock);
        em = lookup_extent_mapping(em_tree, offset, PAGE_CACHE_SIZE);
-       spin_unlock(&em_tree->lock);
+       read_unlock(&em_tree->lock);
        if (!em) {
                __unplug_io_fn(bdi, page);
                return;
@@ -1698,7 +1698,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
                err = -EINVAL;
                goto fail_iput;
        }
-
+printk("thread pool is %d\n", fs_info->thread_pool_size);
        /*
         * we need to start all the end_io workers up front because the
         * queue work function gets called at interrupt time, and so it
@@ -1743,20 +1743,22 @@ struct btrfs_root *open_ctree(struct super_block *sb,
        fs_info->endio_workers.idle_thresh = 4;
        fs_info->endio_meta_workers.idle_thresh = 4;
 
-       fs_info->endio_write_workers.idle_thresh = 64;
-       fs_info->endio_meta_write_workers.idle_thresh = 64;
+       fs_info->endio_write_workers.idle_thresh = 2;
+       fs_info->endio_meta_write_workers.idle_thresh = 2;
+
+       fs_info->endio_workers.atomic_worker_start = 1;
+       fs_info->endio_meta_workers.atomic_worker_start = 1;
+       fs_info->endio_write_workers.atomic_worker_start = 1;
+       fs_info->endio_meta_write_workers.atomic_worker_start = 1;
 
        btrfs_start_workers(&fs_info->workers, 1);
        btrfs_start_workers(&fs_info->submit_workers, 1);
        btrfs_start_workers(&fs_info->delalloc_workers, 1);
        btrfs_start_workers(&fs_info->fixup_workers, 1);
-       btrfs_start_workers(&fs_info->endio_workers, fs_info->thread_pool_size);
-       btrfs_start_workers(&fs_info->endio_meta_workers,
-                           fs_info->thread_pool_size);
-       btrfs_start_workers(&fs_info->endio_meta_write_workers,
-                           fs_info->thread_pool_size);
-       btrfs_start_workers(&fs_info->endio_write_workers,
-                           fs_info->thread_pool_size);
+       btrfs_start_workers(&fs_info->endio_workers, 1);
+       btrfs_start_workers(&fs_info->endio_meta_workers, 1);
+       btrfs_start_workers(&fs_info->endio_meta_write_workers, 1);
+       btrfs_start_workers(&fs_info->endio_write_workers, 1);
 
        fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super);
        fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages,