def _check_free_area(self, area: gdb.Value, is_pcp: bool) -> None:
nr_free = 0
if is_pcp:
list_array_name = "lists"
error_desc = "pcplist"
else:
list_array_name = "free_list"
error_desc = "free area"
for free_list in array_for_each(area[list_array_name]):
try:
for page_obj in list_for_each_entry(free_list,
self.types.page_type,
"lru"):
page = crash.types.page.Page.from_obj(page_obj)
nr_free += 1
if page.get_nid() != self.nid or page.get_zid(
) != self.zid:
print(
f"page 0x{int(page_obj.address):x} misplaced on "
f"{error_desc} of node {self.nid} zone {self.zid}, "
f"has flags for node {page.get_nid()} zone {page.get_zid()}"
)
except BufferError as e:
print(f"Error traversing free area: {e}")
nr_expected = area["count"] if is_pcp else area["nr_free"]
if nr_free != nr_expected:
print(f"nr_free mismatch in {error_desc} 0x{int(area.address):x}: "
f"expected {nr_expected}, counted {nr_free}")
def _check_free_area(self, area: gdb.Value, is_pcp: bool) -> None:
nr_free = 0
list_array_name = "lists" if is_pcp else "free_list"
for free_list in array_for_each(area[list_array_name]):
for page_obj in list_for_each_entry(free_list,
self.types.page_type, "lru"):
page = crash.types.page.Page.from_obj(page_obj)
nr_free += 1
if page.get_nid() != self.nid or page.get_zid() != self.zid:
print(
"page {:#x} misplaced on {} of zone {}:{}, has flags for zone {}:{}"
.format(int(page_obj.address),
"pcplist" if is_pcp else "freelist", self.nid,
self.zid, page.get_nid(), page.get_zid()))
nr_expected = area["count"] if is_pcp else area["nr_free"]
if nr_free != nr_expected:
print("nr_free mismatch in {} {}: expected {}, counted {}".format(
"pcplist" if is_pcp else "area", area.address, nr_expected,
nr_free))
def check_free_pages(self) -> None:
for area in array_for_each(self.gdb_obj["free_area"]):
self._check_free_area(area, False)
for cpu in for_each_online_cpu():
pageset = get_percpu_var(self.gdb_obj["pageset"], cpu)
self._check_free_area(pageset["pcp"], True)