[PATCH v4 1/7] mm/dax: Dump start address in fault handler

Peter Xu
2024-08-07T19:48:20Z

Currently the dax fault handler dumps the vma range when dynamic debugging
enabled. That's mostly not useful. Dump the (aligned) address instead
with the order info.

Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
drivers/dax/device.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index 2051e4f73c8a..9c1a729cd77e 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -235,9 +235,9 @@ static vm_fault_t dev_dax_huge_fault(struct vm_fault *vmf, unsigned int order)
int id;
struct dev_dax *dev_dax = filp->private_data;

- dev_dbg(&dev_dax->dev, "%s: %s (%#lx - %#lx) order:%d\n", current->comm,
- (vmf->flags & FAULT_FLAG_WRITE) ? "write" : "read",
- vmf->vma->vm_start, vmf->vma->vm_end, order);
+ dev_dbg(&dev_dax->dev, "%s: op=%s addr=%#lx order=%d\n", current->comm,
+ (vmf->flags & FAULT_FLAG_WRITE) ? "write" : "read",
+ vmf->address & ~((1UL << (order + PAGE_SHIFT)) - 1), order);

id = dax_read_lock();
if (order == 0)
--
2.45.0