From: Rodrigo Vivi <rodrigo.vivi@intel.com>
To: Alexander Coffin <alex@cyberialabs.net>
Cc: <intel-gfx@lists.freedesktop.org>,
Jani Nikula <jani.nikula@linux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Subject: Re: i915 potential deadlock
Date: Fri, 1 Nov 2024 16:08:41 -0400 [thread overview]
Message-ID: <ZyU1SQjAfUQBgbPF@intel.com> (raw)
In-Reply-To: <50b67f9f-e615-414d-abf5-4ee82e35a353@cyberialabs.net>
On Thu, Oct 31, 2024 at 10:24:45AM -0700, Alexander Coffin wrote:
>
> Hello again,
Hi Alexander,
> I attempted to send a potential deadlock issue from my work email (acoffin@sfcompute.com) and suspect that using gmail with a very long email was causing issues as it didn't seem to show up from what I can see on the mailing list. I am retrying from my personal email now. Apologizes to anyone who receives this message twice.
I'm sorry for that. Our list is moderated for non-subscribers because of the
amount of spams we receive daily. But I eventually got to your msg and
allowed it to go through.
> I was attempting to investigate an issue that I believe may be related to iwlwifi, but managed to stumble across this lockdep report first when I was attempting to debug the kernel in general. This is from Linux Kernel version v6.1.112 (technically the Debian patched version, but I don't think that is relevant to this issue).
Could you please file a bug in our gitlab?
https://drm.pages.freedesktop.org/intel-docs/how-to-file-i915-bugs.html
The report in the emails are easily ignored and lost.
>
>
>
>
> I haven't had a chance to read this code yet, but I thought that I would report it so that someone more familiar with this code base could have a chance to investigate before I do (if I have time). As far as I can see there weren't any changes to i915 after 6.1.112 that were relevant (I only see "drm/i915/gem: fix bitwise and logical AND mixup") so unless a backport is missing I believe that this issue would also affect mainline version, but as I don't know the steps to reproduce this issue I can't easily test the mainline version.
Well, so many things changed from 6.1... Is it possible to test with a drm-tip
kernel and see if it is still reproduced?
https://gitlab.freedesktop.org/drm/tip
With a more recent from your distro at least, it would be already better
than this old 6.1.
Thanks,
Rodrigo.
>
>
>
>
> I am including 2 text snippets.
>
>
> 1. A releveant log snippet from `journalctl -k`
>
>
> 2. An annotated version of the prior relevant portion (passed through `./scripts/decode_stacktrace.sh -r 6.1.112`).
>
>
>
>
> Please let me know if anyone wants the full dmesg log and I will attempt to figure out how to send it without making email clients angry.
>
>
>
>
> File 1:
>
>
>
>
> ```
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ======================================================
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: WARNING: possible circular locking dependency detected
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: 6.1.112 #2 Not tainted
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ------------------------------------------------------
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Xorg/1263 is trying to acquire lock:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ffffffff871e3380 (fs_reclaim){+.+.}-{0:0}, at: __kmem_cache_alloc_node+0x4a/0x290
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> but task is already holding lock:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ffff9e0694bdc810 (wakeref.mutex#2/1){+.+.}-{3:3}, at: __intel_wakeref_get_first+0x1f/0x90 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> which lock already depends on the new lock.
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> the existing dependency chain (in reverse order) is:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> -> #2 (wakeref.mutex#2/1){+.+.}-{3:3}:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __mutex_lock+0xbe/0xb90
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __intel_wakeref_get_first+0x1f/0x90 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __i915_vma_active+0xa3/0xb0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_active_acquire+0x56/0xd0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_vma_pin_ww+0x1b2/0x9c0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_pin_fb_obj_dpt.constprop.0+0x209/0x350 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_plane_pin_fb+0xb2/0x100 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_prepare_plane_fb+0xf5/0x2f0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_atomic_helper_prepare_planes+0x71/0x160 [drm_kms_helper]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_atomic_commit+0x8e/0x3c0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_atomic_helper_page_flip+0x5f/0xd0 [drm_kms_helper]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_mode_page_flip_ioctl+0x604/0x6d0 [drm]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl_kernel+0xcd/0x170 [drm]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl+0x22f/0x410 [drm]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __x64_sys_ioctl+0x8d/0xd0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_syscall_64+0x55/0xb0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: entry_SYSCALL_64_after_hwframe+0x6e/0xd8
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> -> #1 (i915_active){+.+.}-{3:3}:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_vma_instance+0x13c/0x580 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_alloc_initial_plane_obj.isra.0+0x15d/0x520 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_crtc_initial_plane_config+0x86/0x2d0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_modeset_init_nogem+0x359/0xeb0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_driver_probe+0x604/0xe60 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: local_pci_probe+0x3e/0x80
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: pci_device_probe+0xc3/0x240
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: really_probe+0xdb/0x380
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __driver_probe_device+0x78/0x120
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: driver_probe_device+0x1f/0x90
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __driver_attach+0xd2/0x1c0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: bus_for_each_dev+0x87/0xd0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: bus_add_driver+0x1b1/0x200
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: driver_register+0x89/0xe0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: get_max_energy_counter+0x1f/0x50 [intel_rapl_common]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_one_initcall+0x6d/0x280
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_init_module+0x4a/0x1f0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __do_sys_finit_module+0xac/0x120
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_syscall_64+0x55/0xb0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: entry_SYSCALL_64_after_hwframe+0x6e/0xd8
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> -> #0 (fs_reclaim){+.+.}-{0:0}:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __lock_acquire+0x12f4/0x2000
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock_acquire+0xc4/0x2a0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: fs_reclaim_acquire+0xa2/0xe0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __kmem_cache_alloc_node+0x4a/0x290
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __kmalloc+0x4d/0x150
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_internalize_name+0x93/0xf0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_get_node_unlocked+0x80/0x110
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_get_node+0x3a/0x60
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_get_handle+0x57/0xb0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_has_method+0x29/0x50
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_pci_set_power_state+0x44/0x110
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: pci_power_up+0x2e/0x180
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: pci_pm_runtime_resume+0x2f/0xe0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __rpm_callback+0x41/0x170
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: rpm_callback+0x5d/0x70
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: rpm_resume+0x5e7/0x830
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __pm_runtime_resume+0x47/0x90
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_runtime_pm_get+0x1a/0x80 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __intel_wakeref_get_first+0x31/0x90 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_gem_do_execbuffer+0x2417/0x2cc0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_gem_execbuffer2_ioctl+0x11a/0x2b0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl_kernel+0xcd/0x170 [drm]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl+0x22f/0x410 [drm]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __x64_sys_ioctl+0x8d/0xd0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_syscall_64+0x55/0xb0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: entry_SYSCALL_64_after_hwframe+0x6e/0xd8
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> other info that might help us debug this:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Chain exists of:
>
>
> fs_reclaim --> i915_active --> wakeref.mutex#2/1
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Possible unsafe locking scenario:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: CPU0 CPU1
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ---- ----
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock(wakeref.mutex#2/1);
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock(i915_active);
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock(wakeref.mutex#2/1);
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock(fs_reclaim);
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> *** DEADLOCK ***
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: 1 lock held by Xorg/1263:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: #0: ffff9e0694bdc810 (wakeref.mutex#2/1){+.+.}-{3:3}, at: __intel_wakeref_get_first+0x1f/0x90 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> stack backtrace:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: CPU: 8 PID: 1263 Comm: Xorg Not tainted 6.1.112 #2
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Hardware name: Dell Inc. XPS 15 9530/013F3N, BIOS 1.15.0 07/08/2024
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Call Trace:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: <TASK>
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: dump_stack_lvl+0x5b/0x77
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: check_noncircular+0x11c/0x130
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __lock_acquire+0x12f4/0x2000
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock_acquire+0xc4/0x2a0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? __kmem_cache_alloc_node+0x4a/0x290
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? save_trace+0x3e/0x2c0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: fs_reclaim_acquire+0xa2/0xe0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? __kmem_cache_alloc_node+0x4a/0x290
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __kmem_cache_alloc_node+0x4a/0x290
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? acpi_ns_internalize_name+0x93/0xf0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? acpi_ns_internalize_name+0x93/0xf0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __kmalloc+0x4d/0x150
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_internalize_name+0x93/0xf0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? lock_acquire+0xc4/0x2a0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_get_node_unlocked+0x80/0x110
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? down_timeout+0x4b/0x70
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? acpi_ns_get_node+0x3a/0x60
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_get_node+0x3a/0x60
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_get_handle+0x57/0xb0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_has_method+0x29/0x50
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_pci_set_power_state+0x44/0x110
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: pci_power_up+0x2e/0x180
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: pci_pm_runtime_resume+0x2f/0xe0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? pci_pm_restore_noirq+0xc0/0xc0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __rpm_callback+0x41/0x170
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? pci_pm_restore_noirq+0xc0/0xc0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: rpm_callback+0x5d/0x70
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? pci_pm_restore_noirq+0xc0/0xc0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: rpm_resume+0x5e7/0x830
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __pm_runtime_resume+0x47/0x90
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_runtime_pm_get+0x1a/0x80 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __intel_wakeref_get_first+0x31/0x90 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_gem_do_execbuffer+0x2417/0x2cc0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_gem_execbuffer2_ioctl+0x11a/0x2b0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? i915_gem_do_execbuffer+0x2cc0/0x2cc0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl_kernel+0xcd/0x170 [drm]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl+0x22f/0x410 [drm]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? i915_gem_do_execbuffer+0x2cc0/0x2cc0 [i915]
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __x64_sys_ioctl+0x8d/0xd0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_syscall_64+0x55/0xb0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? kfree+0x107/0x140
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? ___sys_recvmsg+0x9c/0xe0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? __sys_recvmsg+0xa7/0xc0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? exit_to_user_mode_prepare+0x19e/0x250
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? lockdep_hardirqs_on_prepare+0xdc/0x190
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? do_syscall_64+0x61/0xb0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: entry_SYSCALL_64_after_hwframe+0x6e/0xd8
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: RIP: 0033:0x7f258ef06c5b
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: RSP: 002b:00007ffcd0ee2350 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: RAX: ffffffffffffffda RBX: 0000557019e70950 RCX: 00007f258ef06c5b
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: RDX: 00007ffcd0ee2400 RSI: 0000000040406469 RDI: 0000000000000012
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: RBP: 00007ffcd0ee2490 R08: 0000000000000007 R09: 000055701b5d64f0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: R10: 3002f0996e1d00f9 R11: 0000000000000246 R12: 0000000000000000
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: R13: 00007ffcd0ee2400 R14: 0000000000000012 R15: 000055701b743fd0
>
>
> ```
>
>
>
>
> File 2:
>
>
>
>
> ```
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ======================================================
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: WARNING: possible circular locking dependency detected
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: 6.1.112 #2 Not tainted
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ------------------------------------------------------
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Xorg/1263 is trying to acquire lock:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ffffffff871e3380 (fs_reclaim){+.+.}-{0:0}, at: __kmem_cache_alloc_node (./include/linux/sched/mm.h:272 mm/slab.h:710 mm/slub.c:3318 mm/slub.c:3437)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> but task is already holding lock:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ffff9e0694bdc810 (wakeref.mutex#2/1){+.+.}-{3:3}, at: __intel_wakeref_get_first (./arch/x86/include/asm/atomic.h:29 ./include/linux/atomic/atomic-instrumented.h:28 drivers/gpu/drm/i915/intel_wakeref.c:34) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> which lock already depends on the new lock.
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> the existing dependency chain (in reverse order) is:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> -> #2 (wakeref.mutex#2/1){+.+.}-{3:3}:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __mutex_lock (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/lock.h:95 kernel/locking/mutex.c:605 kernel/locking/mutex.c:747)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __intel_wakeref_get_first (./arch/x86/include/asm/atomic.h:29 ./include/linux/atomic/atomic-instrumented.h:28 drivers/gpu/drm/i915/intel_wakeref.c:34) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __i915_vma_active (./drivers/gpu/drm/i915/intel_wakeref.h:85 drivers/gpu/drm/i915/gt/intel_gt_pm.h:21 drivers/gpu/drm/i915/i915_vma.c:112) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_active_acquire (drivers/gpu/drm/i915/i915_active.c:520 drivers/gpu/drm/i915/i915_active.c:503) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_vma_pin_ww (drivers/gpu/drm/i915/i915_vma.c:1506) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_pin_fb_obj_dpt.constprop.0 (drivers/gpu/drm/i915/display/intel_fb_pin.c:85) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_plane_pin_fb (drivers/gpu/drm/i915/display/intel_fb_pin.c:269) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_prepare_plane_fb (drivers/gpu/drm/i915/display/intel_atomic_plane.c:1032) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_atomic_helper_prepare_planes (drivers/gpu/drm/drm_atomic_helper.c:2571 drivers/gpu/drm/drm_atomic_helper.c:2547) drm_kms_helper
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_atomic_commit (drivers/gpu/drm/i915/display/intel_display.c:6964 drivers/gpu/drm/i915/display/intel_display.c:7757) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_atomic_helper_page_flip (drivers/gpu/drm/drm_atomic_helper.c:3596) drm_kms_helper
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_mode_page_flip_ioctl (drivers/gpu/drm/drm_plane.c:1368) drm
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl_kernel (drivers/gpu/drm/drm_ioctl.c:788) drm
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl (./include/linux/thread_info.h:199 ./include/linux/thread_info.h:235 ./include/linux/uaccess.h:168 drivers/gpu/drm/drm_ioctl.c:892) drm
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:870 fs/ioctl.c:856 fs/ioctl.c:856)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_syscall_64 (arch/x86/entry/common.c:51 arch/x86/entry/common.c:81)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> -> #1 (i915_active){+.+.}-{3:3}:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_vma_instance (drivers/gpu/drm/i915/i915_vma.c:159 drivers/gpu/drm/i915/i915_vma.c:325) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_alloc_initial_plane_obj.isra.0 (drivers/gpu/drm/i915/display/intel_plane_initial.c:139 drivers/gpu/drm/i915/display/intel_plane_initial.c:183) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_crtc_initial_plane_config (drivers/gpu/drm/i915/display/intel_plane_initial.c:229 drivers/gpu/drm/i915/display/intel_plane_initial.c:320) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_modeset_init_nogem (drivers/gpu/drm/i915/display/intel_display.c:8794 (discriminator 2)) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_driver_probe (drivers/gpu/drm/i915/i915_driver.c:951) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: local_pci_probe (drivers/pci/pci-driver.c:324)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: pci_device_probe (drivers/pci/pci-driver.c:392 drivers/pci/pci-driver.c:417 drivers/pci/pci-driver.c:460)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: really_probe (drivers/base/dd.c:560 drivers/base/dd.c:639)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __driver_probe_device (drivers/base/dd.c:785)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: driver_probe_device (drivers/base/dd.c:815)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __driver_attach (drivers/base/dd.c:1202)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: bus_for_each_dev (drivers/base/bus.c:301)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: bus_add_driver (drivers/base/bus.c:618)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: driver_register (drivers/base/driver.c:246)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: get_max_energy_counter (drivers/powercap/intel_rapl_common.c:643 drivers/powercap/intel_rapl_common.c:194) intel_rapl_common
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_one_initcall (init/main.c:1298)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_init_module (kernel/module/main.c:2469)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __do_sys_finit_module (kernel/module/main.c:2978)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_syscall_64 (arch/x86/entry/common.c:51 arch/x86/entry/common.c:81)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> -> #0 (fs_reclaim){+.+.}-{0:0}:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __lock_acquire (kernel/locking/lockdep.c:3091 kernel/locking/lockdep.c:3209 kernel/locking/lockdep.c:3825 kernel/locking/lockdep.c:5049)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5664 kernel/locking/lockdep.c:5627)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: fs_reclaim_acquire (mm/page_alloc.c:4682 mm/page_alloc.c:4695)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __kmem_cache_alloc_node (./include/linux/sched/mm.h:272 mm/slab.h:710 mm/slub.c:3318 mm/slub.c:3437)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __kmalloc (mm/slab_common.c:937 mm/slab_common.c:949)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_internalize_name (./include/linux/slab.h:562 ./include/linux/slab.h:693 ./include/acpi/platform/aclinuxex.h:57 drivers/acpi/acpica/nsutils.c:331)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_get_node_unlocked (drivers/acpi/acpica/nsutils.c:666)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_get_node (drivers/acpi/acpica/nsutils.c:729)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_get_handle (drivers/acpi/acpica/nsxfname.c:99)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_has_method (drivers/acpi/utils.c:591)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_pci_set_power_state (drivers/pci/pci-acpi.c:1069 (discriminator 1))
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: pci_power_up (drivers/pci/pci.c:1212)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: pci_pm_runtime_resume (drivers/pci/pci-driver.c:570 (discriminator 4) drivers/pci/pci-driver.c:575 (discriminator 4) drivers/pci/pci-driver.c:1349 (discriminator 4))
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __rpm_callback (drivers/base/power/runtime.c:395)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: rpm_callback (drivers/base/power/runtime.c:532)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: rpm_resume (drivers/base/power/runtime.c:912)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __pm_runtime_resume (./include/linux/spinlock.h:406 drivers/base/power/runtime.c:1171)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_runtime_pm_get (drivers/gpu/drm/i915/intel_runtime_pm.c:358 drivers/gpu/drm/i915/intel_runtime_pm.c:402) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __intel_wakeref_get_first (drivers/gpu/drm/i915/intel_wakeref.c:39) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_gem_do_execbuffer (./drivers/gpu/drm/i915/intel_wakeref.h:85 ./drivers/gpu/drm/i915/gt/intel_gt_pm.h:21 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c:2710 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c:3430) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_gem_execbuffer2_ioctl (drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c:3580) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl_kernel (drivers/gpu/drm/drm_ioctl.c:788) drm
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl (./include/linux/thread_info.h:199 ./include/linux/thread_info.h:235 ./include/linux/uaccess.h:168 drivers/gpu/drm/drm_ioctl.c:892) drm
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:870 fs/ioctl.c:856 fs/ioctl.c:856)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_syscall_64 (arch/x86/entry/common.c:51 arch/x86/entry/common.c:81)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> other info that might help us debug this:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Chain exists of:
>
>
> fs_reclaim --> i915_active --> wakeref.mutex#2/1
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Possible unsafe locking scenario:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: CPU0 CPU1
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ---- ----
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock(wakeref.mutex#2/1);
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock(i915_active);
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock(wakeref.mutex#2/1);
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock(fs_reclaim);
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> *** DEADLOCK ***
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: 1 lock held by Xorg/1263:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: #0: ffff9e0694bdc810 (wakeref.mutex#2/1){+.+.}-{3:3}, at: __intel_wakeref_get_first (./arch/x86/include/asm/atomic.h:29 ./include/linux/atomic/atomic-instrumented.h:28 drivers/gpu/drm/i915/intel_wakeref.c:34) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel:
>
>
> stack backtrace:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: CPU: 8 PID: 1263 Comm: Xorg Not tainted 6.1.112 #2
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Hardware name: Dell Inc. XPS 15 9530/013F3N, BIOS 1.15.0 07/08/2024
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Call Trace:
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: <TASK>
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: dump_stack_lvl (lib/dump_stack.c:110 (discriminator 4))
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: check_noncircular (kernel/locking/lockdep.c:2173)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __lock_acquire (kernel/locking/lockdep.c:3091 kernel/locking/lockdep.c:3209 kernel/locking/lockdep.c:3825 kernel/locking/lockdep.c:5049)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5664 kernel/locking/lockdep.c:5627)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? __kmem_cache_alloc_node (./include/linux/sched/mm.h:272 mm/slab.h:710 mm/slub.c:3318 mm/slub.c:3437)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? save_trace (kernel/locking/lockdep.c:584)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: fs_reclaim_acquire (mm/page_alloc.c:4682 mm/page_alloc.c:4695)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? __kmem_cache_alloc_node (./include/linux/sched/mm.h:272 mm/slab.h:710 mm/slub.c:3318 mm/slub.c:3437)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __kmem_cache_alloc_node (./include/linux/sched/mm.h:272 mm/slab.h:710 mm/slub.c:3318 mm/slub.c:3437)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? acpi_ns_internalize_name (./include/linux/slab.h:562 ./include/linux/slab.h:693 ./include/acpi/platform/aclinuxex.h:57 drivers/acpi/acpica/nsutils.c:331)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? acpi_ns_internalize_name (./include/linux/slab.h:562 ./include/linux/slab.h:693 ./include/acpi/platform/aclinuxex.h:57 drivers/acpi/acpica/nsutils.c:331)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __kmalloc (mm/slab_common.c:937 mm/slab_common.c:949)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_internalize_name (./include/linux/slab.h:562 ./include/linux/slab.h:693 ./include/acpi/platform/aclinuxex.h:57 drivers/acpi/acpica/nsutils.c:331)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5664 kernel/locking/lockdep.c:5627)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_get_node_unlocked (drivers/acpi/acpica/nsutils.c:666)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? down_timeout (kernel/locking/semaphore.c:173)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? acpi_ns_get_node (drivers/acpi/acpica/nsutils.c:729)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_ns_get_node (drivers/acpi/acpica/nsutils.c:729)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_get_handle (drivers/acpi/acpica/nsxfname.c:99)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_has_method (drivers/acpi/utils.c:591)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: acpi_pci_set_power_state (drivers/pci/pci-acpi.c:1069 (discriminator 1))
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: pci_power_up (drivers/pci/pci.c:1212)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: pci_pm_runtime_resume (drivers/pci/pci-driver.c:570 (discriminator 4) drivers/pci/pci-driver.c:575 (discriminator 4) drivers/pci/pci-driver.c:1349 (discriminator 4))
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? pci_pm_restore_noirq (drivers/pci/pci-driver.c:1338)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __rpm_callback (drivers/base/power/runtime.c:395)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? pci_pm_restore_noirq (drivers/pci/pci-driver.c:1338)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: rpm_callback (drivers/base/power/runtime.c:532)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? pci_pm_restore_noirq (drivers/pci/pci-driver.c:1338)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: rpm_resume (drivers/base/power/runtime.c:912)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __pm_runtime_resume (./include/linux/spinlock.h:406 drivers/base/power/runtime.c:1171)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: intel_runtime_pm_get (drivers/gpu/drm/i915/intel_runtime_pm.c:358 drivers/gpu/drm/i915/intel_runtime_pm.c:402) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __intel_wakeref_get_first (drivers/gpu/drm/i915/intel_wakeref.c:39) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_gem_do_execbuffer (./drivers/gpu/drm/i915/intel_wakeref.h:85 ./drivers/gpu/drm/i915/gt/intel_gt_pm.h:21 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c:2710 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c:3430) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: i915_gem_execbuffer2_ioctl (drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c:3580) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? i915_gem_do_execbuffer (drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c:3548) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl_kernel (drivers/gpu/drm/drm_ioctl.c:788) drm
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: drm_ioctl (./include/linux/thread_info.h:199 ./include/linux/thread_info.h:235 ./include/linux/uaccess.h:168 drivers/gpu/drm/drm_ioctl.c:892) drm
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? i915_gem_do_execbuffer (drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c:3548) i915
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:870 fs/ioctl.c:856 fs/ioctl.c:856)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: do_syscall_64 (arch/x86/entry/common.c:51 arch/x86/entry/common.c:81)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? kfree (./include/trace/events/kmem.h:94 mm/slab_common.c:975)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? ___sys_recvmsg (net/socket.c:2778)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? __sys_recvmsg (./include/linux/file.h:33 net/socket.c:2807)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? exit_to_user_mode_prepare (./arch/x86/include/asm/entry-common.h:57 kernel/entry/common.c:212)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4256 kernel/locking/lockdep.c:4315 kernel/locking/lockdep.c:4267)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: ? do_syscall_64 (arch/x86/entry/common.c:88)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: RIP: 0033:0x7f258ef06c5b
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
>
>
> All code
>
>
> ========
>
>
> 0: 00 48 89 add %cl,-0x77(%rax)
>
>
> 3: 44 24 18 rex.R and $0x18,%al
>
>
> 6: 31 c0 xor %eax,%eax
>
>
> 8: 48 8d 44 24 60 lea 0x60(%rsp),%rax
>
>
> d: c7 04 24 10 00 00 00 movl $0x10,(%rsp)
>
>
> 14: 48 89 44 24 08 mov %rax,0x8(%rsp)
>
>
> 19: 48 8d 44 24 20 lea 0x20(%rsp),%rax
>
>
> 1e: 48 89 44 24 10 mov %rax,0x10(%rsp)
>
>
> 23: b8 10 00 00 00 mov $0x10,%eax
>
>
> 28: 0f 05 syscall
>
>
> 2a:* 89 c2 mov %eax,%edx <-- trapping instruction
>
>
> 2c: 3d 00 f0 ff ff cmp $0xfffff000,%eax
>
>
> 31: 77 1c ja 0x4f
>
>
> 33: 48 8b 44 24 18 mov 0x18(%rsp),%rax
>
>
> 38: 64 fs
>
>
> 39: 48 rex.W
>
>
> 3a: 2b .byte 0x2b
>
>
> 3b: 04 25 add $0x25,%al
>
>
> 3d: 28 00 sub %al,(%rax)
>
>
> ...
>
>
>
>
> Code starting with the faulting instruction
>
>
> ===========================================
>
>
> 0: 89 c2 mov %eax,%edx
>
>
> 2: 3d 00 f0 ff ff cmp $0xfffff000,%eax
>
>
> 7: 77 1c ja 0x25
>
>
> 9: 48 8b 44 24 18 mov 0x18(%rsp),%rax
>
>
> e: 64 fs
>
>
> f: 48 rex.W
>
>
> 10: 2b .byte 0x2b
>
>
> 11: 04 25 add $0x25,%al
>
>
> 13: 28 00 sub %al,(%rax)
>
>
> ...
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: RSP: 002b:00007ffcd0ee2350 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: RAX: ffffffffffffffda RBX: 0000557019e70950 RCX: 00007f258ef06c5b
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: RDX: 00007ffcd0ee2400 RSI: 0000000040406469 RDI: 0000000000000012
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: RBP: 00007ffcd0ee2490 R08: 0000000000000007 R09: 000055701b5d64f0
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: R10: 3002f0996e1d00f9 R11: 0000000000000246 R12: 0000000000000000
>
>
> Oct 30 12:06:41 acoffin-xps-15 kernel: R13: 00007ffcd0ee2400 R14: 0000000000000012 R15: 000055701b743fd0
>
>
> ```
>
>
>
>
> Regards,
>
>
>
>
> Alex Coffin
>
>
>
next prev parent reply other threads:[~2024-11-01 20:08 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-31 17:24 i915 potential deadlock Alexander Coffin
2024-11-01 20:08 ` Rodrigo Vivi [this message]
2024-11-02 1:46 ` Alexander Coffin
2024-11-05 2:34 ` Rodrigo Vivi
2024-11-06 17:19 ` Saarinen, Jani
-- strict thread matches above, loose matches on Subject: below --
2024-10-30 22:40 Alexander Coffin
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