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| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2017-05-08 16:00:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-08 17:15:15 -0700 |
| commit | c3ff68d7d1e6a24b7ad76d00ee583929858d4001 (patch) | |
| tree | e834b82b6fe8a37bc015dda345c4e60001acf57c /fs/dax.c | |
| parent | a9c42b33ed80968dd160e3be48c7e84ccf171cf9 (diff) | |
| download | linux-c3ff68d7d1e6a24b7ad76d00ee583929858d4001.tar.bz2 | |
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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/dax.c')
| -rw-r--r-- | fs/dax.c | 3 |
1 files changed, 3 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); |