Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) client-ip=2620:137:e000::1:18;
MIME-Version: 1.0
References: <20220527090039.pdrazo5e6mwgo3d3@lion.mk-sys.cz> <20220527124459.mfo4tjdsjohamsvy@lion.mk-sys.cz>
In-Reply-To: <20220527124459.mfo4tjdsjohamsvy@lion.mk-sys.cz>
From:   Alex Deucher <alexdeucher@gmail.com>
Date:   Wed, 1 Jun 2022 10:55:28 -0400
Message-ID: <CADnq5_PHR3NMhMAWDLy3SGyzn4bHedWDerXVmaFANbooYhZE0w@mail.gmail.com>
Subject: Re: (REGRESSION bisected) Re: amdgpu errors (VM fault / GPU fault
 detected) with 5.19 merge window snapshots
To:     Michal Kubecek <mkubecek@suse.cz>,
        "Yang, Philip" <Philip.Yang@amd.com>
Cc:     amd-gfx list <amd-gfx@lists.freedesktop.org>,
        Alex Deucher <alexander.deucher@amd.com>,
        Felix Kuehling <Felix.Kuehling@amd.com>,
        =?UTF-8?Q?Christian_K=C3=B6nig?= <christian.koenig@amd.com>,
        LKML <linux-kernel@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Fri, May 27, 2022 at 8:58 AM Michal Kubecek <mkubecek@suse.cz> wrote:
>
> On Fri, May 27, 2022 at 11:00:39AM +0200, Michal Kubecek wrote:
> > Hello,
> >
> > while testing 5.19 merge window snapshots (commits babf0bb978e3 and
> > 7e284070abe5), I keep getting errors like below. I have not seen them
> > with 5.18 final or older.
> >
> > ------------------------------------------------------------------------
> > [  247.150333] gmc_v8_0_process_interrupt: 46 callbacks suppressed
> > [  247.150336] amdgpu 0000:0c:00.0: amdgpu: GPU fault detected: 147 0x00020802 for process firefox pid 6101 thread firefox:cs0 pid 6116
> > [  247.150339] amdgpu 0000:0c:00.0: amdgpu:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00107800
> > [  247.150340] amdgpu 0000:0c:00.0: amdgpu:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0D008002
> > [  247.150341] amdgpu 0000:0c:00.0: amdgpu: VM fault (0x02, vmid 6, pasid 32780) at page 1079296, write from 'TC2' (0x54433200) (8)
> [...]
> > [  249.925909] amdgpu 0000:0c:00.0: amdgpu: IH ring buffer overflow (0x000844C0, 0x00004A00, 0x000044D0)
> > [  250.434986] [drm] Fence fallback timer expired on ring sdma0
> > [  466.621568] gmc_v8_0_process_interrupt: 122 callbacks suppressed
> [...]
> > ------------------------------------------------------------------------
> >
> > There does not seem to be any apparent immediate problem with graphics
> > but when running commit babf0bb978e3, there seemed to be a noticeable
> > lag in some operations, e.g. when moving a window or repainting large
> > part of the terminal window in konsole (no idea if it's related).
> >
> > My GPU is Radeon Pro WX 2100 (1002:6995). What other information should
> > I collect to help debugging the issue?
>
> Bisected to commit 5255e146c99a ("drm/amdgpu: rework TLB flushing").
> There seem to be later commits depending on it so I did not test
> a revert on top of current mainline.
>

@Christian Koenig, @Yang, Philip Any ideas?  I think there were some
fix ups for this.  Maybe those just haven't hit the tree yet?

Alex


> I should also mention that most commits tested as "bad" during the
> bisect did behave much worse than current mainline (errors starting as
> early as with sddm, visibly damaged screen content, sometimes even
> crashes). But all of them issued messages similar to those above into
> kernel log.
>
> Michal Kubecek