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| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2017-05-08 16:00:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-08 17:15:16 -0700 |
| commit | f9bc3a07539bc80b4da9ff2f5d6c13d5c7a4f073 (patch) | |
| tree | 9e810d6f0e0dea3f83c8fba495981d10f862b952 | |
| parent | d14a3f48a152b75a1e690d443f509c07c7b06c0e (diff) | |
| download | linux-f9bc3a07539bc80b4da9ff2f5d6c13d5c7a4f073.tar.bz2 | |
dax: add tracepoint to dax_writeback_one()
Add a tracepoint to dax_writeback_one(), following the same logging
conventions as the rest of DAX.
Here is an example range writeback which ends up flushing one PMD and
one PTE:
test-1265 [003] ....
496.615250: dax_writeback_range: dev 259:0 ino 0x1003 pgoff 0x0-0x7ffffffffffff
test-1265 [003] ....
496.616263: dax_writeback_one: dev 259:0 ino 0x1003 pgoff 0x0 pglen 0x200
test-1265 [003] ....
496.616270: dax_writeback_one: dev 259:0 ino 0x1003 pgoff 0x305 pglen 0x1
test-1265 [003] ....
496.616272: dax_writeback_range_done: dev 259:0 ino 0x1003 pgoff 0x0-0x7ffffffffffff
[akpm@linux-foundation.org: struct blk_dax_ctl has disappeared]
Link: http://lkml.kernel.org/r/20170221195116.13278-6-ross.zwisler@linux.intel.com
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/dax.c | 1 | ||||
| -rw-r--r-- | include/trace/events/fs_dax.h | 24 |
2 files changed, 25 insertions, 0 deletions
@@ -823,6 +823,7 @@ static int dax_writeback_one(struct block_device *bdev, spin_lock_irq(&mapping->tree_lock); radix_tree_tag_clear(page_tree, index, PAGECACHE_TAG_DIRTY); spin_unlock_irq(&mapping->tree_lock); + trace_dax_writeback_one(mapping->host, index, size >> PAGE_SHIFT); dax_unlock: dax_read_unlock(id); put_locked_mapping_entry(mapping, index, entry); diff --git a/include/trace/events/fs_dax.h b/include/trace/events/fs_dax.h index 9afe8c8f0bef..292a4719edd0 100644 --- a/include/trace/events/fs_dax.h +++ b/include/trace/events/fs_dax.h @@ -226,6 +226,30 @@ DEFINE_EVENT(dax_writeback_range_class, name, \ DEFINE_WRITEBACK_RANGE_EVENT(dax_writeback_range); DEFINE_WRITEBACK_RANGE_EVENT(dax_writeback_range_done); +TRACE_EVENT(dax_writeback_one, + TP_PROTO(struct inode *inode, pgoff_t pgoff, pgoff_t pglen), + TP_ARGS(inode, pgoff, pglen), + TP_STRUCT__entry( + __field(unsigned long, ino) + __field(pgoff_t, pgoff) + __field(pgoff_t, pglen) + __field(dev_t, dev) + ), + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->ino = inode->i_ino; + __entry->pgoff = pgoff; + __entry->pglen = pglen; + ), + TP_printk("dev %d:%d ino %#lx pgoff %#lx pglen %#lx", + MAJOR(__entry->dev), + MINOR(__entry->dev), + __entry->ino, + __entry->pgoff, + __entry->pglen + ) +) + #endif /* _TRACE_FS_DAX_H */ /* This part must be outside protection */ |