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From: "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
To: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org,
	"Thomas Hellström (VMware)" <thomas_os@shipmail.org>
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
	"Christian König" <christian.koenig@amd.com>,
	"Dan Williams" <dan.j.williams@intel.com>,
	"Jérôme Glisse" <jglisse@redhat.com>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	linux-graphics-maintainer@vmware.com,
	"Michal Hocko" <mhocko@suse.com>,
	pv-drivers@vmware.com, "Ralph Campbell" <rcampbell@nvidia.com>,
	"Roland Scheidegger" <sroland@vmware.com>,
	"Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: Re: Bad rss-counter state from drm/ttm, drm/vmwgfx: Support huge TTM pagefaults
Date: Tue, 07 Apr 2020 11:36:39 -0400
Message-ID: <1586273767.0q72rozj3x.none@localhost> (raw)
In-Reply-To: <37624a1f-8e6b-fe9c-8e0e-a9139e1bbe18@shipmail.org>

Excerpts from Thomas Hellström (VMware)'s message of April 7, 2020 7:26 am:
> On 4/7/20 2:38 AM, Alex Xu (Hello71) wrote:
>> Excerpts from Thomas Hellström (VMware)'s message of April 6, 2020 5:04 pm:
>>> Hi,
>>>
>>> On 4/6/20 9:51 PM, Alex Xu (Hello71) wrote:
>>>> Using 314b658 with amdgpu, starting sway and firefox causes "BUG: Bad
>>>> rss-counter state" and "BUG: non-zero pgtables_bytes on freeing mm" to
>>>> start filling dmesg, and then closing programs causes more BUGs and
>>>> hangs, and then everything grinds to a halt (can't start more programs,
>>>> can't even reboot through systemd).
>>>>
>>>> Using master and reverting that branch up to that point fixes the
>>>> problem.
>>>>
>>>> I'm using a Ryzen 1600 and AMD Radeon RX 480 on an ASRock B450 Pro4
>>>> board with IOMMU enabled.
>>> If you could try the attached patch, that'd be great!
>>>
>>> Thanks,
>>>
>>> Thomas
>>>
>> Yeah, that works too. Kernel config sent off-list.
>>
>> Regards,
>> Alex.
> 
> Thanks. Do you want me to add your
> 
> Reported-by: and Tested-by: To this patch?
> 
> /Thomas
> 
> 

Sure. Shouldn't we fix it properly though?

  reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1586138158.v5u7myprlp.none.ref@localhost>
2020-04-06 19:51 ` Alex Xu (Hello71)
2020-04-06 20:25   ` Thomas Hellström (VMware)
2020-04-06 21:04   ` Thomas Hellström (VMware)
2020-04-07  0:38     ` Alex Xu (Hello71)
2020-04-07 11:26       ` Thomas Hellström (VMware)
2020-04-07 15:36         ` Alex Xu (Hello71) [this message]
2020-04-07 19:57           ` Thomas Hellström (VMware)

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