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

[Vlastimil Babka <vbabka@suse.cz>]

On 8/15/19 9:13 PM, Petr Vandrovec wrote:
> 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

Worth reporting as well, not nice regression.

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

I've been told iommu=soft might help.

> [   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
> 
>