[PATCH 3/3] - Change ext3 to make use of percpu_counter_mod_ll()(added in patch 1/3) to prevent counter overflow, when updating the free blocks counter. Signed-Off-By: Mingming Cao <cmm@xxxxxxxxxx> --- fs/ext3/ialloc.c | 0 linux-2.6.16-cmm/fs/ext3/balloc.c | 4 ++-- linux-2.6.16-cmm/fs/ext3/resize.c | 2 +- linux-2.6.16-cmm/fs/ext3/super.c | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-) diff -puN fs/ext3/balloc.c~ext3_16tb_freeblks_counter_mod_fix fs/ext3/balloc.c --- linux-2.6.16/fs/ext3/balloc.c~ext3_16tb_freeblks_counter_mod_fix 2006-04-05 10:18:29.000000000 -0700 +++ linux-2.6.16-cmm/fs/ext3/balloc.c 2006-04-05 15:51:14.000000000 -0700 @@ -467,7 +467,7 @@ do_more: cpu_to_le16(le16_to_cpu(desc->bg_free_blocks_count) + group_freed); spin_unlock(sb_bgl_lock(sbi, block_group)); - percpu_counter_mod(&sbi->s_freeblocks_counter, count); + percpu_counter_mod_ll(&sbi->s_freeblocks_counter, count); /* We dirtied the bitmap block */ BUFFER_TRACE(bitmap_bh, "dirtied bitmap block"); @@ -1431,7 +1431,7 @@ allocated: gdp->bg_free_blocks_count = cpu_to_le16(le16_to_cpu(gdp->bg_free_blocks_count) - num); spin_unlock(sb_bgl_lock(sbi, group_no)); - percpu_counter_mod(&sbi->s_freeblocks_counter, -num); + percpu_counter_mod_ll(&sbi->s_freeblocks_counter, -num); BUFFER_TRACE(gdp_bh, "journal_dirty_metadata for group descriptor"); err = ext3_journal_dirty_metadata(handle, gdp_bh); diff -puN fs/ext3/resize.c~ext3_16tb_freeblks_counter_mod_fix fs/ext3/resize.c --- linux-2.6.16/fs/ext3/resize.c~ext3_16tb_freeblks_counter_mod_fix 2006-04-05 10:18:29.000000000 -0700 +++ linux-2.6.16-cmm/fs/ext3/resize.c 2006-04-05 10:20:45.000000000 -0700 @@ -869,7 +869,7 @@ int ext3_group_add(struct super_block *s input->reserved_blocks); /* Update the free space counts */ - percpu_counter_mod(&sbi->s_freeblocks_counter, + percpu_counter_mod_ll(&sbi->s_freeblocks_counter, input->free_blocks_count); percpu_counter_mod(&sbi->s_freeinodes_counter, EXT3_INODES_PER_GROUP(sb)); diff -puN fs/ext3/super.c~ext3_16tb_freeblks_counter_mod_fix fs/ext3/super.c --- linux-2.6.16/fs/ext3/super.c~ext3_16tb_freeblks_counter_mod_fix 2006-04-05 10:18:29.000000000 -0700 +++ linux-2.6.16-cmm/fs/ext3/super.c 2006-04-05 15:53:58.000000000 -0700 @@ -2367,7 +2367,7 @@ static int ext3_statfs (struct super_blo buf->f_type = EXT3_SUPER_MAGIC; buf->f_bsize = sb->s_blocksize; buf->f_blocks = le32_to_cpu(es->s_blocks_count) - overhead; - buf->f_bfree = percpu_counter_sum(&sbi->s_freeblocks_counter); + buf->f_bfree = (unsigned long)percpu_counter_sum_ll(&sbi->s_freeblocks_counter); buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count); if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count)) buf->f_bavail = 0; diff -puN fs/ext3/ialloc.c~ext3_16tb_freeblks_counter_mod_fix fs/ext3/ialloc.c _ - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
