提交 287a0ab9 编写于 作者: J Josef Bacik 提交者: Chris Mason

Btrfs: kill max_extent mount option

As Yan pointed out, theres not much reason for all this complicated math to
account for file extents being split up into max_extent chunks, since they are
likely to all end up in the same leaf anyway.  Since there isn't much reason to
use max_extent, just remove the option altogether so we have one less thing we
need to test.
Signed-off-by: NJosef Bacik <josef@redhat.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>
上级 1b1d1f66
...@@ -834,7 +834,6 @@ struct btrfs_fs_info { ...@@ -834,7 +834,6 @@ struct btrfs_fs_info {
u64 last_trans_log_full_commit; u64 last_trans_log_full_commit;
u64 open_ioctl_trans; u64 open_ioctl_trans;
unsigned long mount_opt; unsigned long mount_opt;
u64 max_extent;
u64 max_inline; u64 max_inline;
u64 alloc_start; u64 alloc_start;
struct btrfs_transaction *running_transaction; struct btrfs_transaction *running_transaction;
......
...@@ -1634,7 +1634,6 @@ struct btrfs_root *open_ctree(struct super_block *sb, ...@@ -1634,7 +1634,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
atomic_set(&fs_info->async_submit_draining, 0); atomic_set(&fs_info->async_submit_draining, 0);
atomic_set(&fs_info->nr_async_bios, 0); atomic_set(&fs_info->nr_async_bios, 0);
fs_info->sb = sb; fs_info->sb = sb;
fs_info->max_extent = (u64)-1;
fs_info->max_inline = 8192 * 1024; fs_info->max_inline = 8192 * 1024;
fs_info->metadata_ratio = 0; fs_info->metadata_ratio = 0;
......
...@@ -2846,7 +2846,7 @@ int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root, ...@@ -2846,7 +2846,7 @@ int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root,
} }
spin_unlock(&BTRFS_I(inode)->accounting_lock); spin_unlock(&BTRFS_I(inode)->accounting_lock);
BTRFS_I(inode)->reserved_extents--; BTRFS_I(inode)->reserved_extents -= num_items;
BUG_ON(BTRFS_I(inode)->reserved_extents < 0); BUG_ON(BTRFS_I(inode)->reserved_extents < 0);
if (meta_sinfo->bytes_delalloc < num_bytes) { if (meta_sinfo->bytes_delalloc < num_bytes) {
...@@ -3111,7 +3111,7 @@ int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root, ...@@ -3111,7 +3111,7 @@ int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root,
return -ENOSPC; return -ENOSPC;
} }
BTRFS_I(inode)->reserved_extents++; BTRFS_I(inode)->reserved_extents += num_items;
check_force_delalloc(meta_sinfo); check_force_delalloc(meta_sinfo);
spin_unlock(&meta_sinfo->lock); spin_unlock(&meta_sinfo->lock);
......
...@@ -796,7 +796,7 @@ static noinline int cow_file_range(struct inode *inode, ...@@ -796,7 +796,7 @@ static noinline int cow_file_range(struct inode *inode,
while (disk_num_bytes > 0) { while (disk_num_bytes > 0) {
unsigned long op; unsigned long op;
cur_alloc_size = min(disk_num_bytes, root->fs_info->max_extent); cur_alloc_size = disk_num_bytes;
ret = btrfs_reserve_extent(trans, root, cur_alloc_size, ret = btrfs_reserve_extent(trans, root, cur_alloc_size,
root->sectorsize, 0, alloc_hint, root->sectorsize, 0, alloc_hint,
(u64)-1, &ins, 1); (u64)-1, &ins, 1);
...@@ -1227,30 +1227,9 @@ static int run_delalloc_range(struct inode *inode, struct page *locked_page, ...@@ -1227,30 +1227,9 @@ static int run_delalloc_range(struct inode *inode, struct page *locked_page,
static int btrfs_split_extent_hook(struct inode *inode, static int btrfs_split_extent_hook(struct inode *inode,
struct extent_state *orig, u64 split) struct extent_state *orig, u64 split)
{ {
struct btrfs_root *root = BTRFS_I(inode)->root;
u64 size;
if (!(orig->state & EXTENT_DELALLOC)) if (!(orig->state & EXTENT_DELALLOC))
return 0; return 0;
size = orig->end - orig->start + 1;
if (size > root->fs_info->max_extent) {
u64 num_extents;
u64 new_size;
new_size = orig->end - split + 1;
num_extents = div64_u64(size + root->fs_info->max_extent - 1,
root->fs_info->max_extent);
/*
* if we break a large extent up then leave oustanding_extents
* be, since we've already accounted for the large extent.
*/
if (div64_u64(new_size + root->fs_info->max_extent - 1,
root->fs_info->max_extent) < num_extents)
return 0;
}
spin_lock(&BTRFS_I(inode)->accounting_lock); spin_lock(&BTRFS_I(inode)->accounting_lock);
BTRFS_I(inode)->outstanding_extents++; BTRFS_I(inode)->outstanding_extents++;
spin_unlock(&BTRFS_I(inode)->accounting_lock); spin_unlock(&BTRFS_I(inode)->accounting_lock);
...@@ -1268,38 +1247,10 @@ static int btrfs_merge_extent_hook(struct inode *inode, ...@@ -1268,38 +1247,10 @@ static int btrfs_merge_extent_hook(struct inode *inode,
struct extent_state *new, struct extent_state *new,
struct extent_state *other) struct extent_state *other)
{ {
struct btrfs_root *root = BTRFS_I(inode)->root;
u64 new_size, old_size;
u64 num_extents;
/* not delalloc, ignore it */ /* not delalloc, ignore it */
if (!(other->state & EXTENT_DELALLOC)) if (!(other->state & EXTENT_DELALLOC))
return 0; return 0;
old_size = other->end - other->start + 1;
if (new->start < other->start)
new_size = other->end - new->start + 1;
else
new_size = new->end - other->start + 1;
/* we're not bigger than the max, unreserve the space and go */
if (new_size <= root->fs_info->max_extent) {
spin_lock(&BTRFS_I(inode)->accounting_lock);
BTRFS_I(inode)->outstanding_extents--;
spin_unlock(&BTRFS_I(inode)->accounting_lock);
return 0;
}
/*
* If we grew by another max_extent, just return, we want to keep that
* reserved amount.
*/
num_extents = div64_u64(old_size + root->fs_info->max_extent - 1,
root->fs_info->max_extent);
if (div64_u64(new_size + root->fs_info->max_extent - 1,
root->fs_info->max_extent) > num_extents)
return 0;
spin_lock(&BTRFS_I(inode)->accounting_lock); spin_lock(&BTRFS_I(inode)->accounting_lock);
BTRFS_I(inode)->outstanding_extents--; BTRFS_I(inode)->outstanding_extents--;
spin_unlock(&BTRFS_I(inode)->accounting_lock); spin_unlock(&BTRFS_I(inode)->accounting_lock);
...@@ -1328,6 +1279,7 @@ static int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end, ...@@ -1328,6 +1279,7 @@ static int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end,
BTRFS_I(inode)->outstanding_extents++; BTRFS_I(inode)->outstanding_extents++;
spin_unlock(&BTRFS_I(inode)->accounting_lock); spin_unlock(&BTRFS_I(inode)->accounting_lock);
btrfs_delalloc_reserve_space(root, inode, end - start + 1); btrfs_delalloc_reserve_space(root, inode, end - start + 1);
spin_lock(&root->fs_info->delalloc_lock); spin_lock(&root->fs_info->delalloc_lock);
BTRFS_I(inode)->delalloc_bytes += end - start + 1; BTRFS_I(inode)->delalloc_bytes += end - start + 1;
root->fs_info->delalloc_bytes += end - start + 1; root->fs_info->delalloc_bytes += end - start + 1;
...@@ -1356,6 +1308,7 @@ static int btrfs_clear_bit_hook(struct inode *inode, ...@@ -1356,6 +1308,7 @@ static int btrfs_clear_bit_hook(struct inode *inode,
if (bits & EXTENT_DO_ACCOUNTING) { if (bits & EXTENT_DO_ACCOUNTING) {
spin_lock(&BTRFS_I(inode)->accounting_lock); spin_lock(&BTRFS_I(inode)->accounting_lock);
WARN_ON(!BTRFS_I(inode)->outstanding_extents);
BTRFS_I(inode)->outstanding_extents--; BTRFS_I(inode)->outstanding_extents--;
spin_unlock(&BTRFS_I(inode)->accounting_lock); spin_unlock(&BTRFS_I(inode)->accounting_lock);
btrfs_unreserve_metadata_for_delalloc(root, inode, 1); btrfs_unreserve_metadata_for_delalloc(root, inode, 1);
...@@ -5384,7 +5337,6 @@ void btrfs_destroy_inode(struct inode *inode) ...@@ -5384,7 +5337,6 @@ void btrfs_destroy_inode(struct inode *inode)
void btrfs_drop_inode(struct inode *inode) void btrfs_drop_inode(struct inode *inode)
{ {
struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_root *root = BTRFS_I(inode)->root;
if (inode->i_nlink > 0 && btrfs_root_refs(&root->root_item) == 0) if (inode->i_nlink > 0 && btrfs_root_refs(&root->root_item) == 0)
generic_delete_inode(inode); generic_delete_inode(inode);
else else
...@@ -5788,18 +5740,15 @@ static int prealloc_file_range(struct inode *inode, u64 start, u64 end, ...@@ -5788,18 +5740,15 @@ static int prealloc_file_range(struct inode *inode, u64 start, u64 end,
struct btrfs_trans_handle *trans; struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_key ins; struct btrfs_key ins;
u64 alloc_size;
u64 cur_offset = start; u64 cur_offset = start;
u64 num_bytes = end - start; u64 num_bytes = end - start;
int ret = 0; int ret = 0;
u64 i_size; u64 i_size;
while (num_bytes > 0) { while (num_bytes > 0) {
alloc_size = min(num_bytes, root->fs_info->max_extent);
trans = btrfs_start_transaction(root, 1); trans = btrfs_start_transaction(root, 1);
ret = btrfs_reserve_extent(trans, root, alloc_size, ret = btrfs_reserve_extent(trans, root, num_bytes,
root->sectorsize, 0, alloc_hint, root->sectorsize, 0, alloc_hint,
(u64)-1, &ins, 1); (u64)-1, &ins, 1);
if (ret) { if (ret) {
......
...@@ -303,6 +303,7 @@ static int __btrfs_remove_ordered_extent(struct inode *inode, ...@@ -303,6 +303,7 @@ static int __btrfs_remove_ordered_extent(struct inode *inode,
struct btrfs_ordered_extent *entry) struct btrfs_ordered_extent *entry)
{ {
struct btrfs_ordered_inode_tree *tree; struct btrfs_ordered_inode_tree *tree;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct rb_node *node; struct rb_node *node;
tree = &BTRFS_I(inode)->ordered_tree; tree = &BTRFS_I(inode)->ordered_tree;
...@@ -312,12 +313,13 @@ static int __btrfs_remove_ordered_extent(struct inode *inode, ...@@ -312,12 +313,13 @@ static int __btrfs_remove_ordered_extent(struct inode *inode,
set_bit(BTRFS_ORDERED_COMPLETE, &entry->flags); set_bit(BTRFS_ORDERED_COMPLETE, &entry->flags);
spin_lock(&BTRFS_I(inode)->accounting_lock); spin_lock(&BTRFS_I(inode)->accounting_lock);
WARN_ON(!BTRFS_I(inode)->outstanding_extents);
BTRFS_I(inode)->outstanding_extents--; BTRFS_I(inode)->outstanding_extents--;
spin_unlock(&BTRFS_I(inode)->accounting_lock); spin_unlock(&BTRFS_I(inode)->accounting_lock);
btrfs_unreserve_metadata_for_delalloc(BTRFS_I(inode)->root, btrfs_unreserve_metadata_for_delalloc(BTRFS_I(inode)->root,
inode, 1); inode, 1);
spin_lock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock); spin_lock(&root->fs_info->ordered_extent_lock);
list_del_init(&entry->root_extent_list); list_del_init(&entry->root_extent_list);
/* /*
...@@ -329,7 +331,7 @@ static int __btrfs_remove_ordered_extent(struct inode *inode, ...@@ -329,7 +331,7 @@ static int __btrfs_remove_ordered_extent(struct inode *inode,
!mapping_tagged(inode->i_mapping, PAGECACHE_TAG_DIRTY)) { !mapping_tagged(inode->i_mapping, PAGECACHE_TAG_DIRTY)) {
list_del_init(&BTRFS_I(inode)->ordered_operations); list_del_init(&BTRFS_I(inode)->ordered_operations);
} }
spin_unlock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock); spin_unlock(&root->fs_info->ordered_extent_lock);
return 0; return 0;
} }
......
...@@ -64,10 +64,9 @@ static void btrfs_put_super(struct super_block *sb) ...@@ -64,10 +64,9 @@ static void btrfs_put_super(struct super_block *sb)
enum { enum {
Opt_degraded, Opt_subvol, Opt_subvolid, Opt_device, Opt_nodatasum, Opt_degraded, Opt_subvol, Opt_subvolid, Opt_device, Opt_nodatasum,
Opt_nodatacow, Opt_max_extent, Opt_max_inline, Opt_alloc_start, Opt_nodatacow, Opt_max_inline, Opt_alloc_start, Opt_nobarrier, Opt_ssd,
Opt_nobarrier, Opt_ssd, Opt_nossd, Opt_ssd_spread, Opt_thread_pool, Opt_nossd, Opt_ssd_spread, Opt_thread_pool, Opt_noacl, Opt_compress,
Opt_noacl, Opt_compress, Opt_compress_force, Opt_notreelog, Opt_ratio, Opt_compress_force, Opt_notreelog, Opt_ratio, Opt_flushoncommit,
Opt_flushoncommit,
Opt_discard, Opt_err, Opt_discard, Opt_err,
}; };
...@@ -79,7 +78,6 @@ static match_table_t tokens = { ...@@ -79,7 +78,6 @@ static match_table_t tokens = {
{Opt_nodatasum, "nodatasum"}, {Opt_nodatasum, "nodatasum"},
{Opt_nodatacow, "nodatacow"}, {Opt_nodatacow, "nodatacow"},
{Opt_nobarrier, "nobarrier"}, {Opt_nobarrier, "nobarrier"},
{Opt_max_extent, "max_extent=%s"},
{Opt_max_inline, "max_inline=%s"}, {Opt_max_inline, "max_inline=%s"},
{Opt_alloc_start, "alloc_start=%s"}, {Opt_alloc_start, "alloc_start=%s"},
{Opt_thread_pool, "thread_pool=%d"}, {Opt_thread_pool, "thread_pool=%d"},
...@@ -188,18 +186,6 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) ...@@ -188,18 +186,6 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
info->thread_pool_size); info->thread_pool_size);
} }
break; break;
case Opt_max_extent:
num = match_strdup(&args[0]);
if (num) {
info->max_extent = memparse(num, NULL);
kfree(num);
info->max_extent = max_t(u64,
info->max_extent, root->sectorsize);
printk(KERN_INFO "btrfs: max_extent at %llu\n",
(unsigned long long)info->max_extent);
}
break;
case Opt_max_inline: case Opt_max_inline:
num = match_strdup(&args[0]); num = match_strdup(&args[0]);
if (num) { if (num) {
...@@ -529,9 +515,6 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs) ...@@ -529,9 +515,6 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
seq_puts(seq, ",nodatacow"); seq_puts(seq, ",nodatacow");
if (btrfs_test_opt(root, NOBARRIER)) if (btrfs_test_opt(root, NOBARRIER))
seq_puts(seq, ",nobarrier"); seq_puts(seq, ",nobarrier");
if (info->max_extent != (u64)-1)
seq_printf(seq, ",max_extent=%llu",
(unsigned long long)info->max_extent);
if (info->max_inline != 8192 * 1024) if (info->max_inline != 8192 * 1024)
seq_printf(seq, ",max_inline=%llu", seq_printf(seq, ",max_inline=%llu",
(unsigned long long)info->max_inline); (unsigned long long)info->max_inline);
......
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