[Crash-utility] Re: [PATCH v3 3/4] xarray: add large folio support
On Wed, Mar 04, 2026 at 02:45:10PM +1300, Tao Liu wrote:
Hi Huang,
I still encounter some regressions for v3:
crash: invalid structure member offset: folio__flags_1
FILE: memory.c LINE: 20445 FUNCTION: folio_order()
[/root/crash-dev/crash] error trace: 9be19e => a12519 => a05a6f => adf8fd
Detaching from process 3369535
adf8fd: OFFSET_verify+164
Detaching from process 3369536
a05a6f: folio_order+156
Detaching from process 3369537
a12519: do_xarray_count+48
Detaching from process 3369538
9be19e: do_xarray_iter+334
Child exited with status 1
Thread 1 "crash" hit Breakpoint 1, folio_order
(folio=18446626868456917760) at memory.c:20445
20445 readmem(folio + OFFSET(folio__flags_1), KVADDR, &v, sizeof(ulong),
By the
way, your vmlinux/vmcore is for 4.18.
In the v3 code for folio_order:
int
folio_order(ulong folio)
{
ulong v = 0;
int PG_head = 16;
if (THIS_KERNEL_VERSION < LINUX(5,17,0))
return 0; <---- return here.
The code should not run to the line:
readmem(folio + OFFSET(folio__flags_1), KVADDR, &v, sizeof(ulong),
Thanks
Huang Shijie