#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/ratelimit.h>
+#include <linux/percpu_counter.h>
#include "compat.h"
#include "hash.h"
#include "ctree.h"
struct btrfs_space_info *found;
int i;
int factor;
+ int ret;
if (flags & (BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10))
if (!found)
return -ENOMEM;
+ ret = percpu_counter_init(&found->total_bytes_pinned, 0);
+ if (ret) {
+ kfree(found);
+ return ret;
+ }
+
for (i = 0; i < BTRFS_NR_RAID_TYPES; i++)
INIT_LIST_HEAD(&found->block_groups[i]);
init_rwsem(&found->groups_sem);
}
/*
- * If we have less pinned bytes than we want to allocate then
- * don't bother committing the transaction, it won't help us.
+ * If we don't have enough pinned space to deal with this
+ * allocation don't bother committing the transaction.
*/
- if (data_sinfo->bytes_pinned < bytes)
+ if (percpu_counter_compare(&data_sinfo->total_bytes_pinned,
+ bytes) < 0)
committed = 1;
spin_unlock(&data_sinfo->lock);
if (!committed &&
!atomic_read(&root->fs_info->open_ioctl_trans)) {
committed = 1;
+
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
data_sinfo = root->fs_info->data_sinfo;
spin_lock(&data_sinfo->lock);
+ WARN_ON(data_sinfo->bytes_may_use < bytes);
data_sinfo->bytes_may_use -= bytes;
trace_btrfs_space_reservation(root->fs_info, "space_info",
data_sinfo->flags, bytes, 0);
unsigned long nr_pages)
{
struct super_block *sb = root->fs_info->sb;
- int started;
- /* If we can not start writeback, just sync all the delalloc file. */
- started = try_to_writeback_inodes_sb_nr(sb, nr_pages,
- WB_REASON_FS_FREE_SPACE);
- if (!started) {
+ if (down_read_trylock(&sb->s_umount)) {
+ writeback_inodes_sb_nr(sb, nr_pages, WB_REASON_FS_FREE_SPACE);
+ up_read(&sb->s_umount);
+ } else {
/*
* We needn't worry the filesystem going from r/w to r/o though
* we don't acquire ->s_umount mutex, because the filesystem
/* See if there is enough pinned space to make this reservation */
spin_lock(&space_info->lock);
- if (space_info->bytes_pinned >= bytes) {
+ if (percpu_counter_compare(&space_info->total_bytes_pinned,
+ bytes) >= 0) {
spin_unlock(&space_info->lock);
goto commit;
}
spin_lock(&space_info->lock);
spin_lock(&delayed_rsv->lock);
- if (space_info->bytes_pinned + delayed_rsv->size < bytes) {
+ if (percpu_counter_compare(&space_info->total_bytes_pinned,
+ bytes - delayed_rsv->size) >= 0) {
spin_unlock(&delayed_rsv->lock);
spin_unlock(&space_info->lock);
return -ENOSPC;
struct btrfs_caching_control *next;
struct btrfs_caching_control *caching_ctl;
struct btrfs_block_group_cache *cache;
+ struct btrfs_space_info *space_info;
down_write(&fs_info->extent_commit_sem);
up_write(&fs_info->extent_commit_sem);
+ list_for_each_entry_rcu(space_info, &fs_info->space_info, list)
+ percpu_counter_set(&space_info->total_bytes_pinned, 0);
+
update_global_block_rsv(fs_info);
}
return 0;
}
+static void add_pinned_bytes(struct btrfs_fs_info *fs_info, u64 num_bytes,
+ u64 owner, u64 root_objectid)
+{
+ struct btrfs_space_info *space_info;
+ u64 flags;
+
+ if (owner < BTRFS_FIRST_FREE_OBJECTID) {
+ if (root_objectid == BTRFS_CHUNK_TREE_OBJECTID)
+ flags = BTRFS_BLOCK_GROUP_SYSTEM;
+ else
+ flags = BTRFS_BLOCK_GROUP_METADATA;
+ } else {
+ flags = BTRFS_BLOCK_GROUP_DATA;
+ }
+
+ space_info = __find_space_info(fs_info, flags);
+ BUG_ON(!space_info); /* Logic bug */
+ percpu_counter_add(&space_info->total_bytes_pinned, num_bytes);
+}
+
+
static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 bytenr, u64 num_bytes, u64 parent,
goto out;
}
}
+ add_pinned_bytes(root->fs_info, -num_bytes, owner_objectid,
+ root_objectid);
} else {
if (found_extent) {
BUG_ON(is_data && refs_to_drop !=
u64 parent, int last_ref)
{
struct btrfs_block_group_cache *cache = NULL;
+ int pin = 1;
int ret;
if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
btrfs_add_free_space(cache, buf->start, buf->len);
btrfs_update_reserved_bytes(cache, buf->len, RESERVE_FREE);
+ pin = 0;
}
out:
+ if (pin)
+ add_pinned_bytes(root->fs_info, buf->len,
+ btrfs_header_level(buf),
+ root->root_key.objectid);
+
/*
* Deleting the buffer, clear the corrupt flag since it doesn't matter
* anymore.
int ret;
struct btrfs_fs_info *fs_info = root->fs_info;
+ add_pinned_bytes(root->fs_info, num_bytes, owner, root_objectid);
+
/*
* tree log blocks never actually go into the extent allocation
* tree, just update pinning info and exit early.
struct btrfs_space_info *space_info;
struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;
struct btrfs_device *device;
+ struct btrfs_trans_handle *trans;
u64 min_free;
u64 dev_min = 1;
u64 dev_nr = 0;
do_div(min_free, dev_min);
}
+ /* We need to do this so that we can look at pending chunks */
+ trans = btrfs_join_transaction(root);
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ goto out;
+ }
+
mutex_lock(&root->fs_info->chunk_mutex);
list_for_each_entry(device, &fs_devices->alloc_list, dev_alloc_list) {
u64 dev_offset;
*/
if (device->total_bytes > device->bytes_used + min_free &&
!device->is_tgtdev_for_dev_replace) {
- ret = find_free_dev_extent(device, min_free,
+ ret = find_free_dev_extent(trans, device, min_free,
&dev_offset, NULL);
if (!ret)
dev_nr++;
}
}
mutex_unlock(&root->fs_info->chunk_mutex);
+ btrfs_end_transaction(trans, root);
out:
btrfs_put_block_group(block_group);
return ret;
dump_space_info(space_info, 0, 0);
}
}
+ percpu_counter_destroy(&space_info->total_bytes_pinned);
list_del(&space_info->list);
kfree(space_info);
}
sizeof(item));
if (ret)
btrfs_abort_transaction(trans, extent_root, ret);
+ ret = btrfs_finish_chunk_alloc(trans, extent_root,
+ key.objectid, key.offset);
+ if (ret)
+ btrfs_abort_transaction(trans, extent_root, ret);
}
}
projects / deliverable / linux.git / blobdiff