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-rw-r--r--fs/btrfs/delayed-ref.c22
-rw-r--r--fs/btrfs/delayed-ref.h10
-rw-r--r--fs/btrfs/extent-tree.c46
-rw-r--r--fs/btrfs/inode.c25
-rw-r--r--fs/btrfs/transaction.c4
5 files changed, 83 insertions, 24 deletions
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index 6d16bea94e1c..8f8ed7d20bac 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -489,11 +489,13 @@ update_existing_ref(struct btrfs_trans_handle *trans,
* existing and update must have the same bytenr
*/
static noinline void
-update_existing_head_ref(struct btrfs_delayed_ref_node *existing,
+update_existing_head_ref(struct btrfs_delayed_ref_root *delayed_refs,
+ struct btrfs_delayed_ref_node *existing,
struct btrfs_delayed_ref_node *update)
{
struct btrfs_delayed_ref_head *existing_ref;
struct btrfs_delayed_ref_head *ref;
+ int old_ref_mod;
existing_ref = btrfs_delayed_node_to_head(existing);
ref = btrfs_delayed_node_to_head(update);
@@ -541,7 +543,20 @@ update_existing_head_ref(struct btrfs_delayed_ref_node *existing,
* only need the lock for this case cause we could be processing it
* currently, for refs we just added we know we're a-ok.
*/
+ old_ref_mod = existing_ref->total_ref_mod;
existing->ref_mod += update->ref_mod;
+ existing_ref->total_ref_mod += update->ref_mod;
+
+ /*
+ * If we are going to from a positive ref mod to a negative or vice
+ * versa we need to make sure to adjust pending_csums accordingly.
+ */
+ if (existing_ref->is_data) {
+ if (existing_ref->total_ref_mod >= 0 && old_ref_mod < 0)
+ delayed_refs->pending_csums -= existing->num_bytes;
+ if (existing_ref->total_ref_mod < 0 && old_ref_mod >= 0)
+ delayed_refs->pending_csums += existing->num_bytes;
+ }
spin_unlock(&existing_ref->lock);
}
@@ -605,6 +620,7 @@ add_delayed_ref_head(struct btrfs_fs_info *fs_info,
head_ref->is_data = is_data;
head_ref->ref_root = RB_ROOT;
head_ref->processing = 0;
+ head_ref->total_ref_mod = count_mod;
spin_lock_init(&head_ref->lock);
mutex_init(&head_ref->mutex);
@@ -614,7 +630,7 @@ add_delayed_ref_head(struct btrfs_fs_info *fs_info,
existing = htree_insert(&delayed_refs->href_root,
&head_ref->href_node);
if (existing) {
- update_existing_head_ref(&existing->node, ref);
+ update_existing_head_ref(delayed_refs, &existing->node, ref);
/*
* we've updated the existing ref, free the newly
* allocated ref
@@ -622,6 +638,8 @@ add_delayed_ref_head(struct btrfs_fs_info *fs_info,
kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);
head_ref = existing;
} else {
+ if (is_data && count_mod < 0)
+ delayed_refs->pending_csums += num_bytes;
delayed_refs->num_heads++;
delayed_refs->num_heads_ready++;
atomic_inc(&delayed_refs->num_entries);
diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h
index a764e2340d48..5eb0892396d0 100644
--- a/fs/btrfs/delayed-ref.h
+++ b/fs/btrfs/delayed-ref.h
@@ -88,6 +88,14 @@ struct btrfs_delayed_ref_head {
struct rb_node href_node;
struct btrfs_delayed_extent_op *extent_op;
+
+ /*
+ * This is used to track the final ref_mod from all the refs associated
+ * with this head ref, this is not adjusted as delayed refs are run,
+ * this is meant to track if we need to do the csum accounting or not.
+ */
+ int total_ref_mod;
+
/*
* when a new extent is allocated, it is just reserved in memory
* The actual extent isn't inserted into the extent allocation tree
@@ -138,6 +146,8 @@ struct btrfs_delayed_ref_root {
/* total number of head nodes ready for processing */
unsigned long num_heads_ready;
+ u64 pending_csums;
+
/*
* set when the tree is flushing before a transaction commit,
* used by the throttling code to decide if new updates need
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 41e5812c131f..a6f88eb57b39 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2538,6 +2538,12 @@ static noinline int __btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
* list before we release it.
*/
if (btrfs_delayed_ref_is_head(ref)) {
+ if (locked_ref->is_data &&
+ locked_ref->total_ref_mod < 0) {
+ spin_lock(&delayed_refs->lock);
+ delayed_refs->pending_csums -= ref->num_bytes;
+ spin_unlock(&delayed_refs->lock);
+ }
btrfs_delayed_ref_unlock(locked_ref);
locked_ref = NULL;
}
@@ -2626,11 +2632,31 @@ static inline u64 heads_to_leaves(struct btrfs_root *root, u64 heads)
return div_u64(num_bytes, BTRFS_LEAF_DATA_SIZE(root));
}
+/*
+ * Takes the number of bytes to be csumm'ed and figures out how many leaves it
+ * would require to store the csums for that many bytes.
+ */
+static u64 csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes)
+{
+ u64 csum_size;
+ u64 num_csums_per_leaf;
+ u64 num_csums;
+
+ csum_size = BTRFS_LEAF_DATA_SIZE(root) - sizeof(struct btrfs_item);
+ num_csums_per_leaf = div64_u64(csum_size,
+ (u64)btrfs_super_csum_size(root->fs_info->super_copy));
+ num_csums = div64_u64(csum_bytes, root->sectorsize);
+ num_csums += num_csums_per_leaf - 1;
+ num_csums = div64_u64(num_csums, num_csums_per_leaf);
+ return num_csums;
+}
+
int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_block_rsv *global_rsv;
u64 num_heads = trans->transaction->delayed_refs.num_heads_ready;
+ u64 csum_bytes = trans->transaction->delayed_refs.pending_csums;
u64 num_bytes;
int ret = 0;
@@ -2639,6 +2665,7 @@ int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
if (num_heads > 1)
num_bytes += (num_heads - 1) * root->nodesize;
num_bytes <<= 1;
+ num_bytes += csum_bytes_to_leaves(root, csum_bytes) * root->nodesize;
global_rsv = &root->fs_info->global_block_rsv;
/*
@@ -5065,30 +5092,19 @@ static u64 calc_csum_metadata_size(struct inode *inode, u64 num_bytes,
int reserve)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
- u64 csum_size;
- int num_csums_per_leaf;
- int num_csums;
- int old_csums;
+ u64 old_csums, num_csums;
if (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM &&
BTRFS_I(inode)->csum_bytes == 0)
return 0;
- old_csums = (int)div_u64(BTRFS_I(inode)->csum_bytes, root->sectorsize);
+ old_csums = csum_bytes_to_leaves(root, BTRFS_I(inode)->csum_bytes);
+
if (reserve)
BTRFS_I(inode)->csum_bytes += num_bytes;
else
BTRFS_I(inode)->csum_bytes -= num_bytes;
- csum_size = BTRFS_LEAF_DATA_SIZE(root) - sizeof(struct btrfs_item);
- num_csums_per_leaf = (int)div_u64(csum_size,
- sizeof(struct btrfs_csum_item) +
- sizeof(struct btrfs_disk_key));
- num_csums = (int)div_u64(BTRFS_I(inode)->csum_bytes, root->sectorsize);
- num_csums = num_csums + num_csums_per_leaf - 1;
- num_csums = num_csums / num_csums_per_leaf;
-
- old_csums = old_csums + num_csums_per_leaf - 1;
- old_csums = old_csums / num_csums_per_leaf;
+ num_csums = csum_bytes_to_leaves(root, BTRFS_I(inode)->csum_bytes);
/* No change, no need to reserve more */
if (old_csums == num_csums)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index e3fe137fb826..cec23cf812ee 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4197,9 +4197,10 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
int extent_type = -1;
int ret;
int err = 0;
- int be_nice = 0;
u64 ino = btrfs_ino(inode);
u64 bytes_deleted = 0;
+ bool be_nice = 0;
+ bool should_throttle = 0;
BUG_ON(new_size > 0 && min_type != BTRFS_EXTENT_DATA_KEY);
@@ -4405,19 +4406,20 @@ delete:
btrfs_header_owner(leaf),
ino, extent_offset, 0);
BUG_ON(ret);
- if (be_nice && pending_del_nr &&
- (pending_del_nr % 16 == 0) &&
- bytes_deleted > 1024 * 1024) {
+ if (btrfs_should_throttle_delayed_refs(trans, root))
btrfs_async_run_delayed_refs(root,
trans->delayed_ref_updates * 2, 0);
- }
}
if (found_type == BTRFS_INODE_ITEM_KEY)
break;
+ should_throttle =
+ btrfs_should_throttle_delayed_refs(trans, root);
+
if (path->slots[0] == 0 ||
- path->slots[0] != pending_del_slot) {
+ path->slots[0] != pending_del_slot ||
+ (be_nice && should_throttle)) {
if (pending_del_nr) {
ret = btrfs_del_items(trans, root, path,
pending_del_slot,
@@ -4430,6 +4432,15 @@ delete:
pending_del_nr = 0;
}
btrfs_release_path(path);
+ if (be_nice && should_throttle) {
+ unsigned long updates = trans->delayed_ref_updates;
+ if (updates) {
+ trans->delayed_ref_updates = 0;
+ ret = btrfs_run_delayed_refs(trans, root, updates * 2);
+ if (ret && !err)
+ err = ret;
+ }
+ }
goto search_again;
} else {
path->slots[0]--;
@@ -4449,7 +4460,7 @@ error:
btrfs_free_path(path);
- if (be_nice && bytes_deleted > 32 * 1024 * 1024) {
+ if (be_nice && btrfs_should_throttle_delayed_refs(trans, root)) {
unsigned long updates = trans->delayed_ref_updates;
if (updates) {
trans->delayed_ref_updates = 0;
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index ba831ee41891..8b9eea8f2406 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -64,6 +64,9 @@ void btrfs_put_transaction(struct btrfs_transaction *transaction)
if (atomic_dec_and_test(&transaction->use_count)) {
BUG_ON(!list_empty(&transaction->list));
WARN_ON(!RB_EMPTY_ROOT(&transaction->delayed_refs.href_root));
+ if (transaction->delayed_refs.pending_csums)
+ printk(KERN_ERR "pending csums is %llu\n",
+ transaction->delayed_refs.pending_csums);
while (!list_empty(&transaction->pending_chunks)) {
struct extent_map *em;
@@ -223,6 +226,7 @@ loop:
cur_trans->delayed_refs.href_root = RB_ROOT;
atomic_set(&cur_trans->delayed_refs.num_entries, 0);
cur_trans->delayed_refs.num_heads_ready = 0;
+ cur_trans->delayed_refs.pending_csums = 0;
cur_trans->delayed_refs.num_heads = 0;
cur_trans->delayed_refs.flushing = 0;
cur_trans->delayed_refs.run_delayed_start = 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-15 15:09:46 +0000