}
break;
case Opt_alloc_start:
- num = match_strdup(&args[0]);
- if (num) {
- mutex_lock(&info->chunk_mutex);
- info->alloc_start = memparse(num, NULL);
- mutex_unlock(&info->chunk_mutex);
- kfree(num);
- btrfs_info(info, "allocations start at %llu",
- info->alloc_start);
- } else {
- ret = -ENOMEM;
- goto out;
- }
+ btrfs_info(info,
+ "option alloc_start is obsolete, ignored");
break;
case Opt_acl:
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
seq_puts(seq, ",nobarrier");
if (info->max_inline != BTRFS_DEFAULT_MAX_INLINE)
seq_printf(seq, ",max_inline=%llu", info->max_inline);
- if (info->alloc_start != 0)
- seq_printf(seq, ",alloc_start=%llu", info->alloc_start);
if (info->thread_pool_size != min_t(unsigned long,
num_online_cpus() + 2, 8))
seq_printf(seq, ",thread_pool=%d", info->thread_pool_size);
unsigned long old_opts = fs_info->mount_opt;
unsigned long old_compress_type = fs_info->compress_type;
u64 old_max_inline = fs_info->max_inline;
- u64 old_alloc_start = fs_info->alloc_start;
int old_thread_pool_size = fs_info->thread_pool_size;
unsigned int old_metadata_ratio = fs_info->metadata_ratio;
int ret;
fs_info->mount_opt = old_opts;
fs_info->compress_type = old_compress_type;
fs_info->max_inline = old_max_inline;
- mutex_lock(&fs_info->chunk_mutex);
- fs_info->alloc_start = old_alloc_start;
- mutex_unlock(&fs_info->chunk_mutex);
btrfs_resize_thread_pool(fs_info,
old_thread_pool_size, fs_info->thread_pool_size);
fs_info->metadata_ratio = old_metadata_ratio;
u64 skip_space;
u64 type;
u64 avail_space;
- u64 used_space;
u64 min_stripe_size;
int min_stripes = 1, num_stripes = 1;
int i = 0, nr_devices;
- int ret;
/*
* We aren't under the device list lock, so this is racy-ish, but good
else
min_stripe_size = BTRFS_STRIPE_LEN;
- if (fs_info->alloc_start)
- mutex_lock(&fs_devices->device_list_mutex);
rcu_read_lock();
list_for_each_entry_rcu(device, &fs_devices->devices, dev_list) {
if (!device->in_fs_metadata || !device->bdev ||
*/
skip_space = SZ_1M;
- /* user can set the offset in fs_info->alloc_start. */
- if (fs_info->alloc_start &&
- fs_info->alloc_start + BTRFS_STRIPE_LEN <=
- device->total_bytes) {
- rcu_read_unlock();
- skip_space = max(fs_info->alloc_start, skip_space);
-
- /*
- * btrfs can not use the free space in
- * [0, skip_space - 1], we must subtract it from the
- * total. In order to implement it, we account the used
- * space in this range first.
- */
- ret = btrfs_account_dev_extents_size(device, 0,
- skip_space - 1,
- &used_space);
- if (ret) {
- kfree(devices_info);
- mutex_unlock(&fs_devices->device_list_mutex);
- return ret;
- }
-
- rcu_read_lock();
-
- /* calc the free space in [0, skip_space - 1] */
- skip_space -= used_space;
- }
-
/*
* we can use the free space in [0, skip_space - 1], subtract
* it from the total.
i++;
}
rcu_read_unlock();
- if (fs_info->alloc_start)
- mutex_unlock(&fs_devices->device_list_mutex);
nr_devices = i;
* multiplier to scale the sizes.
*
* Unused device space usage is based on simulating the chunk allocator
- * algorithm that respects the device sizes, order of allocations and the
- * 'alloc_start' value, this is a close approximation of the actual use but
- * there are other factors that may change the result (like a new metadata
- * chunk).
+ * algorithm that respects the device sizes and order of allocations. This is
+ * a close approximation of the actual use but there are other factors that may
+ * change the result (like a new metadata chunk).
*
* If metadata is exhausted, f_bavail will be 0.
*/