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ext4: Add markers for better debuggability 

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
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9
fs/ext4/ialloc.c
View File

@ -210,6 +210,11 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
ino = inode->i_ino;
ext4_debug("freeing inode %lu\n", ino);
trace_mark(ext4_free_inode,
"dev %s ino %lu mode %d uid %lu gid %lu bocks %llu",
sb->s_id, inode->i_ino, inode->i_mode,
(unsigned long) inode->i_uid, (unsigned long) inode->i_gid,
(unsigned long long) inode->i_blocks);
/*
* Note: we must free any quota before locking the superblock,
@ -698,6 +703,8 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
return ERR_PTR(-EPERM);
sb = dir->i_sb;
trace_mark(ext4_request_inode, "dev %s dir %lu mode %d", sb->s_id,
dir->i_ino, mode);
inode = new_inode(sb);
if (!inode)
return ERR_PTR(-ENOMEM);
@ -925,6 +932,8 @@ got:
}
ext4_debug("allocating inode %lu\n", inode->i_ino);
trace_mark(ext4_allocate_inode, "dev %s ino %lu dir %lu mode %d",
sb->s_id, inode->i_ino, dir->i_ino, mode);
goto really_out;
fail:
ext4_std_error(sb, err);

56
fs/ext4/inode.c
View File

@ -1351,6 +1351,10 @@ static int ext4_write_begin(struct file *file, struct address_space *mapping,
pgoff_t index;
unsigned from, to;
trace_mark(ext4_write_begin,
"dev %s ino %lu pos %llu len %u flags %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, flags);
index = pos >> PAGE_CACHE_SHIFT;
from = pos & (PAGE_CACHE_SIZE - 1);
to = from + len;
@ -1422,6 +1426,10 @@ static int ext4_ordered_write_end(struct file *file,
struct inode *inode = mapping->host;
int ret = 0, ret2;
trace_mark(ext4_ordered_write_end,
"dev %s ino %lu pos %llu len %u copied %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, copied);
ret = ext4_jbd2_file_inode(handle, inode);
if (ret == 0) {
@ -1460,6 +1468,10 @@ static int ext4_writeback_write_end(struct file *file,
int ret = 0, ret2;
loff_t new_i_size;
trace_mark(ext4_writeback_write_end,
"dev %s ino %lu pos %llu len %u copied %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, copied);
new_i_size = pos + copied;
if (new_i_size > EXT4_I(inode)->i_disksize) {
ext4_update_i_disksize(inode, new_i_size);
@ -1495,6 +1507,10 @@ static int ext4_journalled_write_end(struct file *file,
unsigned from, to;
loff_t new_i_size;
trace_mark(ext4_journalled_write_end,
"dev %s ino %lu pos %llu len %u copied %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, copied);
from = pos & (PAGE_CACHE_SIZE - 1);
to = from + len;
@ -2311,6 +2327,9 @@ static int ext4_da_writepage(struct page *page,
struct buffer_head *page_bufs;
struct inode *inode = page->mapping->host;
trace_mark(ext4_da_writepage,
"dev %s ino %lu page_index %lu",
inode->i_sb->s_id, inode->i_ino, page->index);
size = i_size_read(inode);
if (page->index == size >> PAGE_CACHE_SHIFT)
len = size & ~PAGE_CACHE_MASK;
@ -2421,6 +2440,20 @@ static int ext4_da_writepages(struct address_space *mapping,
int needed_blocks, ret = 0, nr_to_writebump = 0;
struct ext4_sb_info *sbi = EXT4_SB(mapping->host->i_sb);
trace_mark(ext4_da_writepages,
"dev %s ino %lu nr_t_write %ld "
"pages_skipped %ld range_start %llu "
"range_end %llu nonblocking %d "
"for_kupdate %d for_reclaim %d "
"for_writepages %d range_cyclic %d",
inode->i_sb->s_id, inode->i_ino,
wbc->nr_to_write, wbc->pages_skipped,
(unsigned long long) wbc->range_start,
(unsigned long long) wbc->range_end,
wbc->nonblocking, wbc->for_kupdate,
wbc->for_reclaim, wbc->for_writepages,
wbc->range_cyclic);
/*
* No pages to write? This is mainly a kludge to avoid starting
* a transaction for special inodes like journal inode on last iput()
@ -2539,6 +2572,14 @@ out_writepages:
if (!no_nrwrite_index_update)
wbc->no_nrwrite_index_update = 0;
wbc->nr_to_write -= nr_to_writebump;
trace_mark(ext4_da_writepage_result,
"dev %s ino %lu ret %d pages_written %d "
"pages_skipped %ld congestion %d "
"more_io %d no_nrwrite_index_update %d",
inode->i_sb->s_id, inode->i_ino, ret,
pages_written, wbc->pages_skipped,
wbc->encountered_congestion, wbc->more_io,
wbc->no_nrwrite_index_update);
return ret;
}
@ -2590,6 +2631,11 @@ static int ext4_da_write_begin(struct file *file, struct address_space *mapping,
len, flags, pagep, fsdata);
}
*fsdata = (void *)0;
trace_mark(ext4_da_write_begin,
"dev %s ino %lu pos %llu len %u flags %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, flags);
retry:
/*
* With delayed allocation, we don't log the i_disksize update
@ -2679,6 +2725,10 @@ static int ext4_da_write_end(struct file *file,
}
}
trace_mark(ext4_da_write_end,
"dev %s ino %lu pos %llu len %u copied %u",
inode->i_sb->s_id, inode->i_ino,
(unsigned long long) pos, len, copied);
start = pos & (PAGE_CACHE_SIZE - 1);
end = start + copied - 1;
@ -2892,6 +2942,9 @@ static int ext4_normal_writepage(struct page *page,
loff_t size = i_size_read(inode);
loff_t len;
trace_mark(ext4_normal_writepage,
"dev %s ino %lu page_index %lu",
inode->i_sb->s_id, inode->i_ino, page->index);
J_ASSERT(PageLocked(page));
if (page->index == size >> PAGE_CACHE_SHIFT)
len = size & ~PAGE_CACHE_MASK;
@ -2977,6 +3030,9 @@ static int ext4_journalled_writepage(struct page *page,
loff_t size = i_size_read(inode);
loff_t len;
trace_mark(ext4_journalled_writepage,
"dev %s ino %lu page_index %lu",
inode->i_sb->s_id, inode->i_ino, page->index);
J_ASSERT(PageLocked(page));
if (page->index == size >> PAGE_CACHE_SHIFT)
len = size & ~PAGE_CACHE_MASK;

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) {