diff options
| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2017-04-27 09:58:07 +1000 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2017-04-28 16:43:54 +1000 |
| commit | e707bd1902667ede312731bef7d1a3e47551e698 (patch) | |
| tree | e03b92cee3869db0855792f9313ff0e7cfa0c18c | |
| parent | 776e459d1eefff282f3ced8cb560035f1545d394 (diff) | |
dax: add tracepoints to dax_pfn_mkwrite()
Add tracepoints to dax_pfn_mkwrite(), following the same logging
conventions as the rest of DAX.
Here is an example PTE fault followed by a pfn_mkwrite:
small_aligned-1094 [002] .... 374.084998: dax_pte_fault: dev 259:0 ino
0x1003 shared WRITE|ALLOW_RETRY|KILLABLE|USER address 0x10400000 pgoff
0x200
small_aligned-1094 [002] .... 374.085145: dax_pte_fault_done: dev 259:0
ino 0x1003 shared WRITE|ALLOW_RETRY|KILLABLE|USER address 0x10400000 pgoff
0x200 MAJOR|NOPAGE
small_aligned-1094 [002] .... 374.085165: dax_pfn_mkwrite: dev 259:0 ino
0x1003 shared WRITE|MKWRITE|ALLOW_RETRY|KILLABLE|USER address 0x10400000
pgoff 0x200 NOPAGE
Link: http://lkml.kernel.org/r/20170221195116.13278-3-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>
| -rw-r--r-- | fs/dax.c | 3 | ||||
| -rw-r--r-- | include/trace/events/fs_dax.h | 2 |
2 files changed, 5 insertions, 0 deletions
@@ -927,6 +927,7 @@ int dax_pfn_mkwrite(struct vm_fault *vmf) { struct file *file = vmf->vma->vm_file; struct address_space *mapping = file->f_mapping; + struct inode *inode = mapping->host; void *entry, **slot; pgoff_t index = vmf->pgoff; @@ -936,6 +937,7 @@ int dax_pfn_mkwrite(struct vm_fault *vmf) if (entry) put_unlocked_mapping_entry(mapping, index, entry); spin_unlock_irq(&mapping->tree_lock); + trace_dax_pfn_mkwrite_no_entry(inode, vmf, VM_FAULT_NOPAGE); return VM_FAULT_NOPAGE; } radix_tree_tag_set(&mapping->page_tree, index, PAGECACHE_TAG_DIRTY); @@ -948,6 +950,7 @@ int dax_pfn_mkwrite(struct vm_fault *vmf) */ finish_mkwrite_fault(vmf); put_locked_mapping_entry(mapping, index, entry); + trace_dax_pfn_mkwrite(inode, vmf, VM_FAULT_NOPAGE); return VM_FAULT_NOPAGE; } EXPORT_SYMBOL_GPL(dax_pfn_mkwrite); diff --git a/include/trace/events/fs_dax.h b/include/trace/events/fs_dax.h index cbcd7d64a18d..b5a520961f8d 100644 --- a/include/trace/events/fs_dax.h +++ b/include/trace/events/fs_dax.h @@ -190,6 +190,8 @@ DEFINE_EVENT(dax_pte_fault_class, name, \ DEFINE_PTE_FAULT_EVENT(dax_pte_fault); DEFINE_PTE_FAULT_EVENT(dax_pte_fault_done); +DEFINE_PTE_FAULT_EVENT(dax_pfn_mkwrite_no_entry); +DEFINE_PTE_FAULT_EVENT(dax_pfn_mkwrite); #endif /* _TRACE_FS_DAX_H */ |