[PATCH -next v5 29/32] ext4: add tracepoints for DISKSIZE_GROW_PENDING set, clear, and wait
From: Zhang Yi <hidden>
Date: 2026-08-14 09:40:11
Also in:
linux-fsdevel, lkml
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest, tracing · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
From: Zhang Yi <yi.zhang@huawei.com> Add trace events ext4_iomap_mark_disksize_pending(), ext4_iomap_clear_disksize_pending(), and ext4_iomap_wait_disksize_pending() to track disksize-grow-pending state changes and waiting. Signed-off-by: Zhang Yi <yi.zhang@huawei.com> --- fs/ext4/inode.c | 6 +++++- include/trace/events/ext4.h | 35 +++++++++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 2ec69e8abe54..bca7d5c33919 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c@@ -133,6 +133,7 @@ void ext4_inode_csum_set(struct inode *inode, struct ext4_inode *raw, */ void ext4_iomap_clear_disksize_pending(struct inode *inode) { + trace_ext4_iomap_clear_disksize_pending(inode); ext4_clear_inode_state(inode, EXT4_STATE_DISKSIZE_GROW_PENDING); /* * Make sure clearing of EXT4_STATE_DISKSIZE_GROW_PENDING is
@@ -151,6 +152,7 @@ void ext4_iomap_clear_disksize_pending(struct inode *inode) */ void ext4_iomap_wait_disksize_pending(struct inode *inode) { + trace_ext4_iomap_wait_disksize_pending(inode); wait_on_bit(ext4_inode_state_wait_word(inode), ext4_inode_state_wait_bit(EXT4_STATE_DISKSIZE_GROW_PENDING), TASK_UNINTERRUPTIBLE);
@@ -4895,8 +4897,10 @@ static int ext4_iomap_mark_disksize_pending(struct inode *inode, loff_t from) */ if (likely(folio_test_dirty(folio) && !ext4_test_inode_state(inode, - EXT4_STATE_DISKSIZE_GROW_PENDING))) + EXT4_STATE_DISKSIZE_GROW_PENDING))) { + trace_ext4_iomap_mark_disksize_pending(inode); ext4_set_inode_state(inode, EXT4_STATE_DISKSIZE_GROW_PENDING); + } folio_unlock(folio); folio_put(folio);
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 69596a216dcb..4539ef8e5f86 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h@@ -3202,6 +3202,41 @@ DEFINE_SET_IOMAP_EVENT(ext4_iomap_buffered_write_begin); DEFINE_SET_IOMAP_EVENT(ext4_iomap_map_writeback_range); DEFINE_SET_IOMAP_EVENT(ext4_iomap_zero_begin); +DECLARE_EVENT_CLASS(ext4_iomap_disksize_pending, + TP_PROTO(struct inode *inode), + TP_ARGS(inode), + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u64, ino) + __field(loff_t, i_size) + __field(loff_t, i_disksize) + ), + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->i_size = i_size_read(inode); + __entry->i_disksize = READ_ONCE(EXT4_I(inode)->i_disksize); + ), + TP_printk("dev %d:%d ino %llu i_size %lld i_disksize %lld", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->ino, __entry->i_size, __entry->i_disksize) +); + +DEFINE_EVENT(ext4_iomap_disksize_pending, ext4_iomap_mark_disksize_pending, + TP_PROTO(struct inode *inode), + TP_ARGS(inode) +); + +DEFINE_EVENT(ext4_iomap_disksize_pending, ext4_iomap_clear_disksize_pending, + TP_PROTO(struct inode *inode), + TP_ARGS(inode) +); + +DEFINE_EVENT(ext4_iomap_disksize_pending, ext4_iomap_wait_disksize_pending, + TP_PROTO(struct inode *inode), + TP_ARGS(inode) +); + #endif /* _TRACE_EXT4_H */ /* This part must be outside protection */
--
2.52.0