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author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2017-05-08 16:00:16 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-08 17:15:16 -0700 |
commit | b4440734583c3addf80558e8fde2b61e2d76328c (patch) | |
tree | ca70107c520065f047a62288e5b0c5f877ab3628 /fs/dax.c | |
parent | f9bc3a07539bc80b4da9ff2f5d6c13d5c7a4f073 (diff) | |
download | linux-stable-b4440734583c3addf80558e8fde2b61e2d76328c.tar.gz linux-stable-b4440734583c3addf80558e8fde2b61e2d76328c.tar.bz2 linux-stable-b4440734583c3addf80558e8fde2b61e2d76328c.zip |
dax: add tracepoint to dax_insert_mapping()
Add a tracepoint to dax_insert_mapping(), following the same logging
conventions as the rest of DAX. This tracepoint, along with the one in
dax_load_hole(), lets us know how a DAX PTE fault was serviced.
Here is an example DAX fault that inserts a PTE mapping:
small-1126 [007] ....
145.451604: dax_pte_fault: dev 259:0 ino 0x1003 shared WRITE|ALLOW_RETRY|KILLABLE|USER address 0x10420000 pgoff 0x220
small-1126 [007] ....
145.452317: dax_insert_mapping: dev 259:0 ino 0x1003 shared write address 0x10420000 radix_entry 0x100006
small-1126 [007] ....
145.452399: dax_pte_fault_done: dev 259:0 ino 0x1003 shared WRITE|ALLOW_RETRY|KILLABLE|USER address 0x10420000 pgoff 0x220 MAJOR|NOPAGE
Link: http://lkml.kernel.org/r/20170221195116.13278-7-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 | 1 |
1 files changed, 1 insertions, 0 deletions
@@ -925,6 +925,7 @@ static int dax_insert_mapping(struct address_space *mapping, return PTR_ERR(ret); *entryp = ret; + trace_dax_insert_mapping(mapping->host, vmf, ret); return vm_insert_mixed(vma, vaddr, pfn); } |