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From: Alex Deucher <alexdeucher@gmail.com>
Date: Thu, 16 May 2024 14:31:58 -0400
Message-ID: <CADnq5_NmC9bYkPFUD35gBtxsk_9jYhOTugni-q4WGXggf6=rLA@mail.gmail.com>
Subject: Re: [git pull] drm urgent for 6.10-rc1
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Airlie <airlied@gmail.com>, Daniel Vetter <daniel.vetter@ffwll.ch>, 
	"Deucher, Alexander" <Alexander.Deucher@amd.com>, 
	Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>, 
	dri-devel <dri-devel@lists.freedesktop.org>, LKML <linux-kernel@vger.kernel.org>
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On Thu, May 16, 2024 at 2:02=E2=80=AFPM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> On Wed, 15 May 2024 at 19:54, Dave Airlie <airlied@gmail.com> wrote:
> >
> > Here is the buddy allocator fix I picked up from the list, please apply=
.
>
> So I removed my reverts, and am running a kernel that includes the
> merge 972a2543e3dd ("Merge tag 'drm-next-2024-05-16' of
> https://gitlab.freedesktop.org/drm/kernel") but I still see a lot of
> warnings as per below.
>
> I was going to say that the difference is that now they trigger
> through the page fault path (amdgpu_gem_fault) while previously they
> triggered through the system call path and amdgpu_drm_ioctl. But it
> turns out it's both in both cases, and it just happened to be one or
> the other in the particular warnings that I cut-and-pasted.
>
> As before, there are tens of thousands of them after being up for less
> than an hour, so this is not some kind of rare thing.
>
> The machine hasn't _crashed_ yet, though. But I'm going to be out and
> about and working on my laptop the rest of the day, so I won't be able
> to test.
>
> (And that kernel version of "6.9.0-08295-gfd39ab3b5289" that is quoted
> in the WARN isn't some official kernel, I have about ten private
> patches that I keep testing in my tree, so if you wondered what the
> heck that git version is, it's not going to match anything you see,
> but the ~ten patches also aren't relevant to this).
>
> Nothing unusual in the config, although this is clang-built. Shouldn't
> matter, never has before.

Arun is investigating and trying to repro it.  You still have a
polaris based GPU right?

Thanks,

Alex

>
>             Linus
>
> ---
> CPU: 28 PID: 3326 Comm: mutter-x11-fram Tainted: G        W
> 6.9.0-08295-gfd39ab3b5289 #64
> Hardware name: Gigabyte Technology Co., Ltd. TRX40 AORUS MASTER/TRX40
> AORUS MASTER, BIOS F7 09/07/2022
> RIP: 0010:__force_merge+0x14f/0x180 [drm_buddy]
> Code: 74 0d 49 8b 44 24 18 48 d3 e0 49 29 44 24 30 4c 89 e7 ba 01 00
> 00 00 e8 9f 00 00 00 44 39 e8 73 1f 49 8b 04 24 e9 25 ff ff ff <0f> 0b
> 4c 39 c3 75 a3 eb 99 b8 f4 ff ff ff c3 b8 f4 ff ff ff eb 02
> RSP: 0000:ffff9e350314baa0 EFLAGS: 00010246
> RAX: ffff974a227a4a00 RBX: ffff974a2d024b88 RCX: 000000000b8eb800
> RDX: ffff974a2d024bf8 RSI: ffff974a2d024bd0 RDI: ffff974a2d024bb0
> RBP: 0000000000000000 R08: ffff974a2d024b88 R09: 0000000000001000
> R10: 0000000000000800 R11: 0000000000000000 R12: ffff974a2198fa18
> R13: 0000000000000009 R14: 0000000010000000 R15: 0000000000000000
> FS:  00007f56a78b6540(0000) GS:ffff97591e700000(0000) knlGS:0000000000000=
000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f5688040000 CR3: 0000000198cc9000 CR4: 0000000000350ef0
> Call Trace:
>  <TASK>
>  ? __warn+0xc1/0x190
>  ? __force_merge+0x14f/0x180 [drm_buddy]
>  ? report_bug+0x129/0x1a0
>  ? handle_bug+0x3d/0x70
>  ? exc_invalid_op+0x16/0x40
>  ? asm_exc_invalid_op+0x16/0x20
>  ? __force_merge+0x14f/0x180 [drm_buddy]
>  drm_buddy_alloc_blocks+0x249/0x400 [drm_buddy]
>  ? __cond_resched+0x16/0x40
>  amdgpu_vram_mgr_new+0x204/0x3f0 [amdgpu]
>  ttm_resource_alloc+0x31/0x120 [ttm]
>  ttm_bo_alloc_resource+0xbc/0x260 [ttm]
>  ? memcg_account_kmem+0x4a/0xe0
>  ? ttm_resource_compatible+0xbb/0xe0 [ttm]
>  ttm_bo_validate+0x9f/0x210 [ttm]
>  ? __alloc_pages+0x129/0x210
>  amdgpu_bo_fault_reserve_notify+0x98/0x110 [amdgpu]
>  amdgpu_gem_fault+0x53/0xd0 [amdgpu]
>  __do_fault+0x41/0x140
>  do_pte_missing+0x453/0xfd0
>  handle_mm_fault+0x73c/0x1090
>  do_user_addr_fault+0x2e2/0x6f0
>  exc_page_fault+0x56/0x110
>  asm_exc_page_fault+0x22/0x30