From 27a7ffaccd915675c88045ba83493804a0267ab7 Mon Sep 17 00:00:00 2001 From: Ross Zwisler Date: Wed, 22 Feb 2017 15:40:00 -0800 Subject: 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 Reviewed-by: Jan Kara Acked-by: Steven Rostedt Cc: Dave Chinner Cc: Dave Jiang Cc: Matthew Wilcox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/dax.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'fs/dax.c') 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; } -- cgit v1.2.3