Re: [Bug 204407] New: Bad page state in process Xorg

[Petr Vandrovec <petr@vandrovec.name>]

Vlastimil Babka wrote on 8/15/2019 7:32 AM:
>
> Does the issue still happen with rc4? Could you apply the 3 attached
> patches (work in progress), configure-enable CONFIG_DEBUG_PAGEALLOC and
> CONFIG_PAGE_OWNER and boot kernel with debug_pagealloc=on page_owner=on
> parameters? That should print stacktraces of allocation and first
> freeing (assuming this is a double free).

Unfortunately -rc4 does not find any my SATA disks due to some 
misunderstanding between AHCI driver and HPT642L adapter (there is no 
device 07:00.1, HPT is single-function device at 07:00.0):

[   18.003015] scsi host6: ahci
[   18.006605] DMAR: DRHD: handling fault status reg 2
[   18.006619] DMAR: [DMA Write] Request device [07:00.1] fault addr 
fffe0000 [fault reason 02] Present bit in context entry is clear
[   18.076616] DMAR: DRHD: handling fault status reg 102
[   18.085910] DMAR: [DMA Write] Request device [07:00.1] fault addr 
fffa0000 [fault reason 02] Present bit in context entry is clear
[   18.100989] DMAR: DRHD: handling fault status reg 202
[   18.110985] DMAR: [DMA Write] Request device [07:00.1] fault addr 
fffe0000 [fault reason 02] Present bit in context entry is clear

With iommu=off disks are visible, but USB keyboard (and other USB 
devices) does not work:

[   18.174802] ehci-pci 0000:00:1a.0: swiotlb buffer is full (sz: 8 
bytes), total 0 (slots), used 0 (slots)
[   18.174804] ehci-pci 0000:00:1a.0: overflow 0x0000000ffdc75ae8+8 of 
DMA mask ffffffff bus mask 0
[   18.174815] WARNING: CPU: 2 PID: 508 at kernel/dma/direct.c:35 
report_addr+0x2e/0x50
[   18.174816] Modules linked in:
[   18.174818] CPU: 2 PID: 508 Comm: kworker/2:1 Tainted: G 
   T 5.3.0-rc4-64-00058-gd717b092e0b2 #77
[   18.174819] Hardware name: Dell Inc. Precision T3610/09M8Y8, BIOS A16 
02/05/2018
[   18.174822] Workqueue: usb_hub_wq hub_event

I'll try to find -rc4 configuration that has enabled debugging and can boot. 


Petr