diff options
Diffstat (limited to 'fs/ext4/mballoc.c')
| -rw-r--r-- | fs/ext4/mballoc.c | 35 |
1 files changed, 18 insertions, 17 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 307d447..65329f1 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4706,9 +4706,7 @@ error_return: * @block: start physcial block to add to the block group * @count: number of blocks to free * - * This marks the blocks as free in the bitmap. We ask the - * mballoc to reload the buddy after this by setting group - * EXT4_GROUP_INFO_NEED_INIT_BIT flag + * This marks the blocks as free in the bitmap and buddy. */ void ext4_add_groupblocks(handle_t *handle, struct super_block *sb, ext4_fsblk_t block, unsigned long count) @@ -4720,6 +4718,7 @@ void ext4_add_groupblocks(handle_t *handle, struct super_block *sb, unsigned int i; struct ext4_group_desc *desc; struct ext4_sb_info *sbi = EXT4_SB(sb); + struct ext4_buddy e4b; int err = 0, ret, blk_free_count; ext4_grpblk_t blocks_freed; struct ext4_group_info *grp; @@ -4767,15 +4766,10 @@ void ext4_add_groupblocks(handle_t *handle, struct super_block *sb, err = ext4_journal_get_write_access(handle, gd_bh); if (err) goto error_return; - /* - * make sure we don't allow a parallel init on other groups in the - * same buddy cache - */ - down_write(&grp->alloc_sem); + for (i = 0, blocks_freed = 0; i < count; i++) { BUFFER_TRACE(bitmap_bh, "clear bit"); - if (!ext4_clear_bit_atomic(ext4_group_lock_ptr(sb, block_group), - bit + i, bitmap_bh->b_data)) { + if (!mb_test_bit(bit + i, bitmap_bh->b_data)) { ext4_error(sb, "bit already cleared for block %llu", (ext4_fsblk_t)(block + i)); BUFFER_TRACE(bitmap_bh, "bit already cleared"); @@ -4783,7 +4777,19 @@ void ext4_add_groupblocks(handle_t *handle, struct super_block *sb, blocks_freed++; } } + + err = ext4_mb_load_buddy(sb, block_group, &e4b); + if (err) + goto error_return; + + /* + * need to update group_info->bb_free and bitmap + * with group lock held. generate_buddy look at + * them with group lock_held + */ ext4_lock_group(sb, block_group); + mb_clear_bits(bitmap_bh->b_data, bit, count); + mb_free_blocks(NULL, &e4b, bit, count); blk_free_count = blocks_freed + ext4_free_blks_count(sb, desc); ext4_free_blks_set(sb, desc, blk_free_count); desc->bg_checksum = ext4_group_desc_csum(sbi, block_group, desc); @@ -4795,13 +4801,8 @@ void ext4_add_groupblocks(handle_t *handle, struct super_block *sb, atomic_add(blocks_freed, &sbi->s_flex_groups[flex_group].free_blocks); } - /* - * request to reload the buddy with the - * new bitmap information - */ - set_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &(grp->bb_state)); - grp->bb_free += blocks_freed; - up_write(&grp->alloc_sem); + + ext4_mb_unload_buddy(&e4b); /* We dirtied the bitmap block */ BUFFER_TRACE(bitmap_bh, "dirtied bitmap block"); |