f2fs: support in batch multi blocks preallocation
This patch introduces reserve_new_blocks to make preallocation of multi blocks as in batch operation, so it can avoid lots of redundant operation, result in better performance. In virtual machine, with rotational device: time fallocate -l 32G /mnt/f2fs/file Before: real 0m4.584s user 0m0.000s sys 0m4.580s After: real 0m0.292s user 0m0.000s sys 0m0.272s In x86, with SSD: time fallocate -l 500G $MNT/testfile Before : 24.758 s After : 1.604 s Signed-off-by: Chao Yu <yuchao0@huawei.com> [Jaegeuk Kim: fix bugs and add performance numbers measured in x86.] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
Jaegeuk Kim
Родитель
0fac558b96
Коммит
46008c6d42
132
fs/f2fs/data.c
132
fs/f2fs/data.c
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@ -278,6 +278,16 @@ alloc_new:
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trace_f2fs_submit_page_mbio(fio->page, fio);
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}
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static void __set_data_blkaddr(struct dnode_of_data *dn)
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{
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struct f2fs_node *rn = F2FS_NODE(dn->node_page);
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__le32 *addr_array;
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/* Get physical address of data block */
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addr_array = blkaddr_in_node(rn);
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addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
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}
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/*
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* Lock ordering for the change of data block address:
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* ->data_page
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@ -286,19 +296,9 @@ alloc_new:
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*/
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void set_data_blkaddr(struct dnode_of_data *dn)
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{
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struct f2fs_node *rn;
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__le32 *addr_array;
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struct page *node_page = dn->node_page;
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unsigned int ofs_in_node = dn->ofs_in_node;
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f2fs_wait_on_page_writeback(node_page, NODE, true);
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rn = F2FS_NODE(node_page);
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/* Get physical address of data block */
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addr_array = blkaddr_in_node(rn);
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addr_array[ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
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if (set_page_dirty(node_page))
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f2fs_wait_on_page_writeback(dn->node_page, NODE, true);
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__set_data_blkaddr(dn);
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if (set_page_dirty(dn->node_page))
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dn->node_changed = true;
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}
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@ -309,24 +309,53 @@ void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
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f2fs_update_extent_cache(dn);
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}
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int reserve_new_block(struct dnode_of_data *dn)
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/* dn->ofs_in_node will be returned with up-to-date last block pointer */
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int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
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if (!count)
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return 0;
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if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)))
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return -EPERM;
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if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1)))
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if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count)))
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return -ENOSPC;
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trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node);
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trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
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dn->ofs_in_node, count);
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f2fs_wait_on_page_writeback(dn->node_page, NODE, true);
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for (; count > 0; dn->ofs_in_node++) {
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block_t blkaddr =
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datablock_addr(dn->node_page, dn->ofs_in_node);
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if (blkaddr == NULL_ADDR) {
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dn->data_blkaddr = NEW_ADDR;
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__set_data_blkaddr(dn);
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count--;
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}
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}
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if (set_page_dirty(dn->node_page))
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dn->node_changed = true;
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dn->data_blkaddr = NEW_ADDR;
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set_data_blkaddr(dn);
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mark_inode_dirty(dn->inode);
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sync_inode_page(dn);
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return 0;
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}
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/* Should keep dn->ofs_in_node unchanged */
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int reserve_new_block(struct dnode_of_data *dn)
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{
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unsigned int ofs_in_node = dn->ofs_in_node;
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int ret;
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ret = reserve_new_blocks(dn, 1);
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dn->ofs_in_node = ofs_in_node;
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return ret;
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}
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int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
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{
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bool need_put = dn->inode_page ? false : true;
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@ -545,6 +574,7 @@ static int __allocate_data_block(struct dnode_of_data *dn)
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struct node_info ni;
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int seg = CURSEG_WARM_DATA;
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pgoff_t fofs;
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blkcnt_t count = 1;
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if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)))
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return -EPERM;
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@ -553,7 +583,7 @@ static int __allocate_data_block(struct dnode_of_data *dn)
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if (dn->data_blkaddr == NEW_ADDR)
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goto alloc;
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if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1)))
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if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count)))
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return -ENOSPC;
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alloc:
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@ -621,8 +651,10 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
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struct dnode_of_data dn;
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA;
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pgoff_t pgofs, end_offset;
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pgoff_t pgofs, end_offset, end;
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int err = 0, ofs = 1;
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unsigned int ofs_in_node, last_ofs_in_node;
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blkcnt_t prealloc;
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struct extent_info ei;
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bool allocated = false;
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block_t blkaddr;
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@ -632,6 +664,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
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/* it only supports block size == page size */
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pgofs = (pgoff_t)map->m_lblk;
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end = pgofs + maxblocks;
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if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
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map->m_pblk = ei.blk + pgofs - ei.fofs;
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@ -659,6 +692,8 @@ next_dnode:
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goto unlock_out;
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}
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prealloc = 0;
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ofs_in_node = dn.ofs_in_node;
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end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
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next_block:
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@ -671,17 +706,20 @@ next_block:
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goto sync_out;
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}
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if (flag == F2FS_GET_BLOCK_PRE_AIO) {
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if (blkaddr == NULL_ADDR)
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err = reserve_new_block(&dn);
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if (blkaddr == NULL_ADDR) {
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prealloc++;
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last_ofs_in_node = dn.ofs_in_node;
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}
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} else {
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err = __allocate_data_block(&dn);
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if (!err)
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if (!err) {
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set_inode_flag(F2FS_I(inode),
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FI_APPEND_WRITE);
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allocated = true;
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}
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}
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if (err)
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goto sync_out;
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allocated = true;
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map->m_flags = F2FS_MAP_NEW;
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blkaddr = dn.data_blkaddr;
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} else {
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@ -700,6 +738,9 @@ next_block:
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}
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}
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if (flag == F2FS_GET_BLOCK_PRE_AIO)
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goto skip;
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if (map->m_len == 0) {
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/* preallocated unwritten block should be mapped for fiemap. */
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if (blkaddr == NEW_ADDR)
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@ -711,33 +752,50 @@ next_block:
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} else if ((map->m_pblk != NEW_ADDR &&
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blkaddr == (map->m_pblk + ofs)) ||
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(map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
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flag == F2FS_GET_BLOCK_PRE_DIO ||
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flag == F2FS_GET_BLOCK_PRE_AIO) {
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flag == F2FS_GET_BLOCK_PRE_DIO) {
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ofs++;
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map->m_len++;
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} else {
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goto sync_out;
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}
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skip:
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dn.ofs_in_node++;
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pgofs++;
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if (map->m_len < maxblocks) {
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if (dn.ofs_in_node < end_offset)
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goto next_block;
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/* preallocate blocks in batch for one dnode page */
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if (flag == F2FS_GET_BLOCK_PRE_AIO &&
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(pgofs == end || dn.ofs_in_node == end_offset)) {
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if (allocated)
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sync_inode_page(&dn);
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f2fs_put_dnode(&dn);
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dn.ofs_in_node = ofs_in_node;
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err = reserve_new_blocks(&dn, prealloc);
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if (err)
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goto sync_out;
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if (create) {
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f2fs_unlock_op(sbi);
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f2fs_balance_fs(sbi, allocated);
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map->m_len += dn.ofs_in_node - ofs_in_node;
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if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
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err = -ENOSPC;
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goto sync_out;
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}
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allocated = false;
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goto next_dnode;
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dn.ofs_in_node = end_offset;
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}
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if (pgofs >= end)
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goto sync_out;
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else if (dn.ofs_in_node < end_offset)
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goto next_block;
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if (allocated)
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sync_inode_page(&dn);
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f2fs_put_dnode(&dn);
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if (create) {
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f2fs_unlock_op(sbi);
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f2fs_balance_fs(sbi, allocated);
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}
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allocated = false;
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goto next_dnode;
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sync_out:
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if (allocated)
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sync_inode_page(&dn);
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@ -1094,7 +1094,7 @@ static inline bool f2fs_has_xattr_block(unsigned int ofs)
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}
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static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
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struct inode *inode, blkcnt_t count)
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struct inode *inode, blkcnt_t *count)
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{
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block_t valid_block_count;
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@ -1106,14 +1106,19 @@ static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi,
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}
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#endif
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valid_block_count =
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sbi->total_valid_block_count + (block_t)count;
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sbi->total_valid_block_count + (block_t)(*count);
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if (unlikely(valid_block_count > sbi->user_block_count)) {
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spin_unlock(&sbi->stat_lock);
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return false;
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*count = sbi->user_block_count - sbi->total_valid_block_count;
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if (!*count) {
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spin_unlock(&sbi->stat_lock);
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return false;
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}
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}
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inode->i_blocks += count;
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sbi->total_valid_block_count = valid_block_count;
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sbi->alloc_valid_block_count += (block_t)count;
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/* *count can be recalculated */
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inode->i_blocks += *count;
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sbi->total_valid_block_count =
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sbi->total_valid_block_count + (block_t)(*count);
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sbi->alloc_valid_block_count += (block_t)(*count);
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spin_unlock(&sbi->stat_lock);
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return true;
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}
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@ -1945,6 +1950,7 @@ int f2fs_submit_page_bio(struct f2fs_io_info *);
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void f2fs_submit_page_mbio(struct f2fs_io_info *);
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void set_data_blkaddr(struct dnode_of_data *);
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void f2fs_update_data_blkaddr(struct dnode_of_data *, block_t);
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int reserve_new_blocks(struct dnode_of_data *, blkcnt_t);
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int reserve_new_block(struct dnode_of_data *);
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int f2fs_get_block(struct dnode_of_data *, pgoff_t);
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ssize_t f2fs_preallocate_blocks(struct kiocb *, struct iov_iter *);
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@ -694,28 +694,32 @@ TRACE_EVENT(f2fs_direct_IO_exit,
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__entry->ret)
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);
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TRACE_EVENT(f2fs_reserve_new_block,
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TRACE_EVENT(f2fs_reserve_new_blocks,
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TP_PROTO(struct inode *inode, nid_t nid, unsigned int ofs_in_node),
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TP_PROTO(struct inode *inode, nid_t nid, unsigned int ofs_in_node,
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blkcnt_t count),
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TP_ARGS(inode, nid, ofs_in_node),
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TP_ARGS(inode, nid, ofs_in_node, count),
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TP_STRUCT__entry(
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__field(dev_t, dev)
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__field(nid_t, nid)
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__field(unsigned int, ofs_in_node)
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__field(blkcnt_t, count)
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),
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TP_fast_assign(
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__entry->dev = inode->i_sb->s_dev;
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__entry->nid = nid;
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__entry->ofs_in_node = ofs_in_node;
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__entry->count = count;
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),
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TP_printk("dev = (%d,%d), nid = %u, ofs_in_node = %u",
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TP_printk("dev = (%d,%d), nid = %u, ofs_in_node = %u, count = %llu",
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show_dev(__entry),
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(unsigned int)__entry->nid,
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__entry->ofs_in_node)
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__entry->ofs_in_node,
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(unsigned long long)__entry->count)
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);
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DECLARE_EVENT_CLASS(f2fs__submit_page_bio,
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