[PATCH v4 1/7] mm/dax: Dump start address in fault handler
From: Peter Xu <peterx@redhat.com>
Date: 2024-08-07 19:48:20
Also in:
lkml
Subsystem:
device direct access (dax), the rest · Maintainers:
Dan Williams, Vishal Verma, Dave Jiang, Linus Torvalds
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 <redacted> 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