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authorRoss Zwisler <ross.zwisler@linux.intel.com>2017-02-23 02:40:00 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-23 03:41:26 +0300
commit27a7ffaccd915675c88045ba83493804a0267ab7 (patch)
treef53228b40b5d4901b86a21fe84bbe7a321372619 /fs/dax.c
parent653b2ea3396fda0b5e23a37b3356dd2ca82fe5c1 (diff)
downloadlinux-27a7ffaccd915675c88045ba83493804a0267ab7.tar.xz
dax: add tracepoints to dax_pmd_insert_mapping()
Add tracepoints to dax_pmd_insert_mapping(), following the same logging conventions as the tracepoints in dax_iomap_pmd_fault(). Here is an example PMD fault showing the new tracepoints: big-1504 [001] .... 326.960743: xfs_filemap_pmd_fault: dev 259:0 ino 0x1003 big-1504 [001] .... 326.960753: dax_pmd_fault: dev 259:0 ino 0x1003 shared WRITE|ALLOW_RETRY|KILLABLE|USER address 0x10505000 vm_start 0x10200000 vm_end 0x10700000 pgoff 0x200 max_pgoff 0x1400 big-1504 [001] .... 326.960981: dax_pmd_insert_mapping: dev 259:0 ino 0x1003 shared write address 0x10505000 length 0x200000 pfn 0x100600 DEV|MAP radix_entry 0xc000e big-1504 [001] .... 326.960986: dax_pmd_fault_done: dev 259:0 ino 0x1003 shared WRITE|ALLOW_RETRY|KILLABLE|USER address 0x10505000 vm_start 0x10200000 vm_end 0x10700000 pgoff 0x200 max_pgoff 0x1400 NOPAGE Link: http://lkml.kernel.org/r/1484085142-2297-6-git-send-email-ross.zwisler@linux.intel.com Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Jan Kara <jack@suse.cz> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> 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.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/dax.c b/fs/dax.c
index a622961a717c..06c5dffaa7bc 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1262,15 +1262,16 @@ static int dax_pmd_insert_mapping(struct vm_area_struct *vma, pmd_t *pmd,
{
struct address_space *mapping = vma->vm_file->f_mapping;
struct block_device *bdev = iomap->bdev;
+ struct inode *inode = mapping->host;
struct blk_dax_ctl dax = {
.sector = dax_iomap_sector(iomap, pos),
.size = PMD_SIZE,
};
long length = dax_map_atomic(bdev, &dax);
- void *ret;
+ void *ret = NULL;
if (length < 0) /* dax_map_atomic() failed */
- return VM_FAULT_FALLBACK;
+ goto fallback;
if (length < PMD_SIZE)
goto unmap_fallback;
if (pfn_t_to_pfn(dax.pfn) & PG_PMD_COLOUR)
@@ -1283,13 +1284,18 @@ static int dax_pmd_insert_mapping(struct vm_area_struct *vma, pmd_t *pmd,
ret = dax_insert_mapping_entry(mapping, vmf, *entryp, dax.sector,
RADIX_DAX_PMD);
if (IS_ERR(ret))
- return VM_FAULT_FALLBACK;
+ goto fallback;
*entryp = ret;
+ trace_dax_pmd_insert_mapping(inode, vma, address, write, length,
+ dax.pfn, ret);
return vmf_insert_pfn_pmd(vma, address, pmd, dax.pfn, write);
unmap_fallback:
dax_unmap_atomic(bdev, &dax);
+fallback:
+ trace_dax_pmd_insert_mapping_fallback(inode, vma, address, write,
+ length, dax.pfn, ret);
return VM_FAULT_FALLBACK;
}