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f2fs: check the largest extent at look-up time

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Because of the extent shrinker or other -ENOMEM scenarios, it cannot guarantee
that the largest extent would be cached in the tree all the time.

Instead of relying on extent_tree, we can simply check the cached one in extent
tree accordingly.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2015-06-29 16:01:14 -07:00
parent 3e72f72139
commit 84bc926c07
2 changed files with 20 additions and 8 deletions
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include/trace/events/f2fs.h
+6 -6
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@@ -1099,11 +1099,11 @@ TRACE_EVENT(f2fs_lookup_extent_tree_start,
TRACE_EVENT_CONDITION(f2fs_lookup_extent_tree_end,
TP_PROTO(struct inode *inode, unsigned int pgofs,
struct extent_node *en),
struct extent_info *ei),
TP_ARGS(inode, pgofs, en),
TP_ARGS(inode, pgofs, ei),
TP_CONDITION(en),
TP_CONDITION(ei),
TP_STRUCT__entry(
__field(dev_t, dev)
@@ -1118,9 +1118,9 @@ TRACE_EVENT_CONDITION(f2fs_lookup_extent_tree_end,
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->pgofs = pgofs;
__entry->fofs = en->ei.fofs;
__entry->blk = en->ei.blk;
__entry->len = en->ei.len;
__entry->fofs = ei->fofs;
__entry->blk = ei->blk;
__entry->len = ei->len;
),
TP_printk("dev = (%d,%d), ino = %lu, pgofs = %u, "