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| author |   Theodore Ts'o <tytso@mit.edu> | 2020-07-15 11:48:55 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2020-08-07 14:12:35 -0400 |
| commit | ab74c7b23f3770935016e3eb3ecdf1e42b73efaa (patch) | |
| tree | e84a3eb7db2f6df1a67dd870328856d5bec81de1 | |
| parent | jbd2: remove unused parameter in jbd2_journal_try_to_free_buffers() (diff) | |
| download | wireguard-linux-ab74c7b23f3770935016e3eb3ecdf1e42b73efaa.tar.xz wireguard-linux-ab74c7b23f3770935016e3eb3ecdf1e42b73efaa.zip | |
ext4: indicate via a block bitmap read is prefetched via a tracepoint
Modify the ext4_read_block_bitmap_load tracepoint so that it tells us
whether a block bitmap is being prefetched.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
| -rw-r--r-- | fs/ext4/balloc.c | 2 | ||||
| -rw-r--r-- | include/trace/events/ext4.h | 24 |
2 files changed, 21 insertions, 5 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index 1e2b1b4093aa..48c3df47748d 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -494,7 +494,7 @@ ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group, * submit the buffer_head for reading */ set_buffer_new(bh); - trace_ext4_read_block_bitmap_load(sb, block_group); + trace_ext4_read_block_bitmap_load(sb, block_group, ignore_locked); bh->b_end_io = ext4_end_bitmap_read; get_bh(bh); submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO | diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h index cc41d692ae8e..cbcd2e1a608d 100644 --- a/include/trace/events/ext4.h +++ b/include/trace/events/ext4.h @@ -1312,18 +1312,34 @@ DEFINE_EVENT(ext4__bitmap_load, ext4_mb_buddy_bitmap_load, TP_ARGS(sb, group) ); -DEFINE_EVENT(ext4__bitmap_load, ext4_read_block_bitmap_load, +DEFINE_EVENT(ext4__bitmap_load, ext4_load_inode_bitmap, TP_PROTO(struct super_block *sb, unsigned long group), TP_ARGS(sb, group) ); -DEFINE_EVENT(ext4__bitmap_load, ext4_load_inode_bitmap, +TRACE_EVENT(ext4_read_block_bitmap_load, + TP_PROTO(struct super_block *sb, unsigned long group, bool prefetch), - TP_PROTO(struct super_block *sb, unsigned long group), + TP_ARGS(sb, group, prefetch), - TP_ARGS(sb, group) + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( __u32, group ) + __field( bool, prefetch ) + + ), + + TP_fast_assign( + __entry->dev = sb->s_dev; + __entry->group = group; + __entry->prefetch = prefetch; + ), + + TP_printk("dev %d,%d group %u prefetch %d", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->group, __entry->prefetch) ); TRACE_EVENT(ext4_direct_IO_enter, |