lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ext4: Add markers for better debuggability

Browse Source 
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2009-01-03 20:03:21 -05:00
parent c319106723
commit ba80b1019a
3 changed files with 116 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
fs/ext4/mballoc.c
View File

@ -2878,8 +2878,9 @@ static void release_blocks_on_commit(journal_t *journal, transaction_t *txn)
discard_block = (ext4_fsblk_t) entry->group * EXT4_BLOCKS_PER_GROUP(sb)
+ entry->start_blk
+ le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
trace_mark(ext4_discard_blocks, "dev %s blk %llu count %u", sb->s_id,
(unsigned long long) discard_block, entry->count);
trace_mark(ext4_discard_blocks, "dev %s blk %llu count %u",
sb->s_id, (unsigned long long) discard_block,
entry->count);
sb_issue_discard(sb, discard_block, entry->count);
kmem_cache_free(ext4_free_ext_cachep, entry);
@ -3697,6 +3698,10 @@ ext4_mb_new_inode_pa(struct ext4_allocation_context *ac)
mb_debug("new inode pa %p: %llu/%u for %u\n", pa,
pa->pa_pstart, pa->pa_len, pa->pa_lstart);
trace_mark(ext4_mb_new_inode_pa,
"dev %s ino %lu pstart %llu len %u lstart %u",
sb->s_id, ac->ac_inode->i_ino,
pa->pa_pstart, pa->pa_len, pa->pa_lstart);
ext4_mb_use_inode_pa(ac, pa);
atomic_add(pa->pa_free, &EXT4_SB(sb)->s_mb_preallocated);
@ -3754,7 +3759,9 @@ ext4_mb_new_group_pa(struct ext4_allocation_context *ac)
pa->pa_linear = 1;
mb_debug("new group pa %p: %llu/%u for %u\n", pa,
pa->pa_pstart, pa->pa_len, pa->pa_lstart);
pa->pa_pstart, pa->pa_len, pa->pa_lstart);
trace_mark(ext4_mb_new_group_pa, "dev %s pstart %llu len %u lstart %u",
sb->s_id, pa->pa_pstart, pa->pa_len, pa->pa_lstart);
ext4_mb_use_group_pa(ac, pa);
atomic_add(pa->pa_free, &EXT4_SB(sb)->s_mb_preallocated);
@ -3807,12 +3814,14 @@ ext4_mb_release_inode_pa(struct ext4_buddy *e4b, struct buffer_head *bitmap_bh,
unsigned int next;
ext4_group_t group;
ext4_grpblk_t bit;
unsigned long long grp_blk_start;
sector_t start;
int err = 0;
int free = 0;
BUG_ON(pa->pa_deleted == 0);
ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit);
grp_blk_start = pa->pa_pstart - bit;
BUG_ON(group != e4b->bd_group && pa->pa_len != 0);
end = bit + pa->pa_len;
@ -3842,6 +3851,10 @@ ext4_mb_release_inode_pa(struct ext4_buddy *e4b, struct buffer_head *bitmap_bh,
ext4_mb_store_history(ac);
}
trace_mark(ext4_mb_release_inode_pa,
"dev %s ino %lu block %llu count %u",
sb->s_id, pa->pa_inode->i_ino, grp_blk_start + bit,
next - bit);
mb_free_blocks(pa->pa_inode, e4b, bit, next - bit);
bit = next + 1;
}
@ -3875,6 +3888,8 @@ ext4_mb_release_group_pa(struct ext4_buddy *e4b,
if (ac)
ac->ac_op = EXT4_MB_HISTORY_DISCARD;
trace_mark(ext4_mb_release_group_pa, "dev %s pstart %llu len %d",
sb->s_id, pa->pa_pstart, pa->pa_len);
BUG_ON(pa->pa_deleted == 0);
ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit);
BUG_ON(group != e4b->bd_group && pa->pa_len != 0);
@ -4040,6 +4055,8 @@ void ext4_discard_preallocations(struct inode *inode)
}
mb_debug("discard preallocation for inode %lu\n", inode->i_ino);
trace_mark(ext4_discard_preallocations, "dev %s ino %lu", sb->s_id,
inode->i_ino);
INIT_LIST_HEAD(&list);
@ -4492,6 +4509,8 @@ static int ext4_mb_discard_preallocations(struct super_block *sb, int needed)
int ret;
int freed = 0;
trace_mark(ext4_mb_discard_preallocations, "dev %s needed %d",
sb->s_id, needed);
for (i = 0; i < EXT4_SB(sb)->s_groups_count && needed > 0; i++) {
ret = ext4_mb_discard_group_preallocations(sb, i, needed);
freed += ret;
@ -4520,6 +4539,18 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
sb = ar->inode->i_sb;
sbi = EXT4_SB(sb);
trace_mark(ext4_request_blocks, "dev %s flags %u len %u ino %lu "
"lblk %llu goal %llu lleft %llu lright %llu "
"pleft %llu pright %llu ",
sb->s_id, ar->flags, ar->len,
ar->inode ? ar->inode->i_ino : 0,
(unsigned long long) ar->logical,
(unsigned long long) ar->goal,
(unsigned long long) ar->lleft,
(unsigned long long) ar->lright,
(unsigned long long) ar->pleft,
(unsigned long long) ar->pright);
if (!EXT4_I(ar->inode)->i_delalloc_reserved_flag) {
/*
* With delalloc we already reserved the blocks
@ -4622,6 +4653,19 @@ out3:
reserv_blks);
}
trace_mark(ext4_allocate_blocks,
"dev %s block %llu flags %u len %u ino %lu "
"logical %llu goal %llu lleft %llu lright %llu "
"pleft %llu pright %llu ",
sb->s_id, (unsigned long long) block,
ar->flags, ar->len, ar->inode ? ar->inode->i_ino : 0,
(unsigned long long) ar->logical,
(unsigned long long) ar->goal,
(unsigned long long) ar->lleft,
(unsigned long long) ar->lright,
(unsigned long long) ar->pleft,
(unsigned long long) ar->pright);
return block;
}
@ -4755,6 +4799,10 @@ void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
}
ext4_debug("freeing block %lu\n", block);
trace_mark(ext4_free_blocks,
"dev %s block %llu count %lu metadata %d ino %lu",
sb->s_id, (unsigned long long) block, count, metadata,
inode ? inode->i_ino : 0);
ac = kmem_cache_alloc(ext4_ac_cachep, GFP_NOFS);
if (ac) {