From b4440734583c3addf80558e8fde2b61e2d76328c Mon Sep 17 00:00:00 2001 From: Ross Zwisler Date: Mon, 8 May 2017 16:00:16 -0700 Subject: 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 Reviewed-by: Jan Kara Cc: Alexander Viro Cc: Dan Williams Cc: Ingo Molnar Cc: Matthew Wilcox Cc: Steven Rostedt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/dax.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/dax.c') diff --git a/fs/dax.c b/fs/dax.c index 9bec30e06211..66d79067eedf 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -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); } -- cgit