Hehe, i cant. I dont have any CPU only servers :)


Should 2MB and 1GB one act the same ?


--

tel. 790 202 300

*Tytus Rogalewski*

Dolina Krzemowa 6A

83-010 Jagatowo

NIP: 9570976234


czw., 5 lut 2026 o 13:44 David Hildenbrand (Arm) <david@kernel.org>
napisał(a):

> On 2/4/26 23:50, Tytus Rogalewski wrote:
> > Just had another crash and it is still happening in 6.18.8 . Here is
> > claude output this time as i am lazy :)
>
> I'm lazy and ignore AI slop. :)
>
> [...]
>
> >
> >    Feb 04 21:42:16 pve12 kernel: BUG: unable to handle page fault for
> > address: ff164aee00000000
> >    Feb 04 21:42:16 pve12 kernel: #PF: supervisor read access in kernel
> mode
> >    Feb 04 21:42:16 pve12 kernel: #PF: error_code(0x0000) - not-present
> page
> >    Feb 04 21:42:16 pve12 kernel: PGD 4602067 P4D 0
> >    Feb 04 21:42:16 pve12 kernel: Oops: Oops: 0000 [#1] SMP NOPTI
> >    Feb 04 21:42:16 pve12 kernel: CPU: 125 UID: 0 PID: 783442 Comm: qm
> > Not tainted 6.18.8-pbk #1 PREEMPT(voluntary)
> >    Feb 04 21:42:16 pve12 kernel: Hardware name:  TURIN2D24G-2L+/500W/
> > TURIN2D24G-2L+/500W, BIOS 10.12 11/14/2024
> >    Feb 04 21:42:16 pve12 kernel: RIP: 0010:walk_pgd_range+0x6ff/0xbb0
> >    Feb 04 21:42:16 pve12 kernel: Code: 08 49 39 dd 0f 84 8c 01 00 00 49
> > 89 de 49 8d 9e 00 00 20 00 48 8b 75 b8 48 81 e3 00 00 e0 ff 48 8d 43 ff
> > 48 39 f0 49 0f 43 dd <49> f7 04 24 9f ff ff ff 0f 84 e2 fd ff ff 48 8b
> > 45 c0 41 c7 47 20
> >    Feb 04 21:42:16 pve12 kernel: RSP: 0018:ff643a4c403439a8 EFLAGS:
> 00010287
> >    Feb 04 21:42:16 pve12 kernel: RAX: 000071afc01fffff RBX:
> > 000071afc0200000 RCX: 0000000000000000
> >    Feb 04 21:42:16 pve12 kernel: RDX: 0000000000000000 RSI:
> > 000071afffffffff RDI: 80002fd0000002b7
> >    Feb 04 21:42:16 pve12 kernel: RBP: ff643a4c40343a88 R08:
> > 0000000000000080 R09: 0000000000000000
> >    Feb 04 21:42:16 pve12 kernel: R10: ffffffffb84588c0 R11:
> > 0000000000000000 R12: ff164aee00000000
> >    Feb 04 21:42:16 pve12 kernel: R13: 000071b000000000 R14:
> > 000071afc0000000 R15: ff643a4c40343b08
> >    Feb 04 21:42:16 pve12 kernel: FS:  0000767454f93b80(0000)
> > GS:ff161c21bdefe000(0000) knlGS:0000000000000000
> >    Feb 04 21:42:16 pve12 kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
> > 0000000080050033
> >    Feb 04 21:42:16 pve12 kernel: CR2: ff164aee00000000 CR3:
> > 00000080dff18005 CR4: 0000000000f71ef0
> >    Feb 04 21:42:16 pve12 kernel: PKRU: 55555554
> >    Feb 04 21:42:16 pve12 kernel: Call Trace:
> >    Feb 04 21:42:16 pve12 kernel:  <TASK>
> >    Feb 04 21:42:16 pve12 kernel:  __walk_page_range+0x8e/0x220
> >    Feb 04 21:42:16 pve12 kernel:  walk_page_vma+0x92/0xe0
> >    Feb 04 21:42:16 pve12 kernel:  smap_gather_stats.part.0+0x8c/0xd0
> >    Feb 04 21:42:16 pve12 kernel:  show_smaps_rollup+0x258/0x420
> >    Feb 04 21:42:16 pve12 kernel:  seq_read_iter+0x137/0x4c0
> >    Feb 04 21:42:16 pve12 kernel:  seq_read+0xf5/0x140
> >    Feb 04 21:42:16 pve12 kernel:  vfs_read+0xbb/0x350
> >    Feb 04 21:42:16 pve12 kernel:  ksys_read+0x69/0xf0
> >    Feb 04 21:42:16 pve12 kernel:  __x64_sys_read+0x19/0x30
> >    Feb 04 21:42:16 pve12 kernel:  x64_sys_call+0x2180/0x25a0
> >    Feb 04 21:42:16 pve12 kernel:  do_syscall_64+0x80/0xce0
> >    Feb 04 21:42:16 pve12 kernel:
>  entry_SYSCALL_64_after_hwframe+0x76/0x7e
> >    Feb 04 21:42:16 pve12 kernel:  </TASK>
> >    Feb 04 21:42:16 pve12 kernel: Modules linked in: sctp ip6_udp_tunnel
>
>
> Yeah, same thing again.
>
> Can you retry without vfio passthrough to see whether it's triggered by
> that?
>
> vfio recently gained support for installing huge mappings into user page
> tables. I wonder whether it is related to that.
>
> --
> Cheers,
>
> David
>