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Date:   Thu, 29 Dec 2016 08:28:04 +0100
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Chris Wilson <chris@...is-wilson.co.uk>,
        intel-gfx <intel-gfx@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Mika Kuoppala <mika.kuoppala@...ux.intel.com>,
        Jani Nikula <jani.nikula@...el.com>, linux-pm@...r.kernel.org,
        Pavel Machek <pavel@....cz>
Subject: Re: [Linux v4.10.0-rc1] call-traces after suspend-resume (pm? i915? cpu/hotplug?)

[ Hope I have not dropped people from the CC list ]

Anyway, I tried a bit more with drm-intel-nightly (drm-tip:
2016y-12m-28d-13h-55m-14s UTC integration manifest) on top of Linux
v4.10-rc1.
This has the cpuhp-revert of drm-intel folks but not the
post-cpuhp-fixes of Thomas.

Now, I only see on booting...

[   29.558350] BUG: sleeping function called from invalid context at
drivers/base/power/runtime.c:1032
[   29.558356] in_atomic(): 1, irqs_disabled(): 0, pid: 1507, name: Xorg
[   29.558359] 1 lock held by Xorg/1507:
[   29.558360]  #0:  (&dev->struct_mutex){+.+.+.}, at:
[<ffffffffa0660df3>] i915_mutex_lock_interruptible+0x43/0x140 [i915]
[   29.558456] CPU: 3 PID: 1507 Comm: Xorg Not tainted
4.10.0-rc1-4-iniza-amd64 #1
[   29.558461] Hardware name: SAMSUNG ELECTRONICS CO., LTD.
530U3BI/530U4BI/530U4BH/530U3BI/530U4BI/530U4BH, BIOS 13XK 03/28/2013
[   29.558464] Call Trace:
[   29.558472]  dump_stack+0x85/0xc2
[   29.558478]  ___might_sleep+0x196/0x260
[   29.558484]  __might_sleep+0x53/0xb0
[   29.558488]  __pm_runtime_resume+0x7a/0x90
[   29.558511]  intel_runtime_pm_get+0x25/0x90 [i915]
[   29.558534]  aliasing_gtt_bind_vma+0xaa/0xf0 [i915]
[   29.558558]  i915_vma_bind+0xaf/0x1e0 [i915]
[   29.558580]  i915_gem_execbuffer_relocate_entry+0x513/0x6f0 [i915]
[   29.558584]  ? find_get_entry+0x5/0x240
[   29.558605]  i915_gem_execbuffer_relocate_vma.isra.34+0x188/0x250 [i915]
[   29.558638]  ? i915_vma_bind+0xaf/0x1e0 [i915]
[   29.558673]  ? __i915_vma_do_pin+0x30f/0x550 [i915]
[   29.558706]  ? i915_gem_execbuffer_reserve_vma.isra.31+0x152/0x1f0 [i915]
[   29.558727]  ? i915_gem_execbuffer_reserve.isra.32+0x372/0x3a0 [i915]
[   29.558748]  i915_gem_do_execbuffer.isra.38+0xb50/0x1a80 [i915]
[   29.558752]  ? __might_fault+0x4e/0xb0
[   29.558772]  i915_gem_execbuffer2+0xc5/0x260 [i915]
[   29.558775]  ? __might_fault+0x4e/0xb0
[   29.558791]  drm_ioctl+0x20b/0x460 [drm]
[   29.558811]  ? i915_gem_execbuffer+0x340/0x340 [i915]
[   29.558816]  ? __fget+0x5/0x200
[   29.558819]  do_vfs_ioctl+0x91/0x6f0
[   29.558822]  ? __fget+0x111/0x200
[   29.558824]  ? __fget+0x5/0x200
[   29.558827]  SyS_ioctl+0x79/0x90
[   29.558832]  entry_SYSCALL_64_fastpath+0x23/0xc6

...and after suspend/resume (looks like the same call-trace)...

[  108.502938] PM: resume of devices complete after 792.728 msecs
[  108.506825] Restarting tasks ... done.
[  110.410210] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[  110.412520] ata1.00: configured for UDMA/133
[  110.909622] BUG: sleeping function called from invalid context at
drivers/base/power/runtime.c:1032
[  110.909639] in_atomic(): 1, irqs_disabled(): 0, pid: 1507, name: Xorg
[  110.909649] 1 lock held by Xorg/1507:
[  110.909652]  #0:  (&dev->struct_mutex){+.+.+.}, at:
[<ffffffffa0660df3>] i915_mutex_lock_interruptible+0x43/0x140 [i915]
[  110.909775] CPU: 1 PID: 1507 Comm: Xorg Tainted: G        W
4.10.0-rc1-4-iniza-amd64 #1
[  110.909779] Hardware name: SAMSUNG ELECTRONICS CO., LTD.
530U3BI/530U4BI/530U4BH/530U3BI/530U4BI/530U4BH, BIOS 13XK 03/28/2013
[  110.909783] Call Trace:
[  110.909800]  dump_stack+0x85/0xc2
[  110.909810]  ___might_sleep+0x196/0x260
[  110.909818]  __might_sleep+0x53/0xb0
[  110.909827]  __pm_runtime_resume+0x7a/0x90
[  110.909902]  intel_runtime_pm_get+0x25/0x90 [i915]
[  110.909976]  aliasing_gtt_bind_vma+0xaa/0xf0 [i915]
[  110.910057]  i915_vma_bind+0xaf/0x1e0 [i915]
[  110.910133]  i915_gem_execbuffer_relocate_entry+0x513/0x6f0 [i915]
[  110.910144]  ? free_hot_cold_page+0x1c1/0x390
[  110.910216]  i915_gem_execbuffer_relocate_vma.isra.34+0x188/0x250 [i915]
[  110.910226]  ? free_pages+0x13/0x20
[  110.910305]  ? __i915_vma_do_pin+0x30f/0x550 [i915]
[  110.910380]  ? i915_gem_execbuffer_reserve_vma.isra.31+0x152/0x1f0 [i915]
[  110.910453]  ? i915_gem_execbuffer_reserve.isra.32+0x372/0x3a0 [i915]
[  110.910506]  i915_gem_do_execbuffer.isra.38+0xb50/0x1a80 [i915]
[  110.910513]  ? __might_fault+0x4e/0xb0
[  110.910559]  i915_gem_execbuffer2+0xc5/0x260 [i915]
[  110.910563]  ? __might_fault+0x4e/0xb0
[  110.910594]  drm_ioctl+0x20b/0x460 [drm]
[  110.910640]  ? i915_gem_execbuffer+0x340/0x340 [i915]
[  110.910646]  ? __fget+0x5/0x200
[  110.910651]  do_vfs_ioctl+0x91/0x6f0
[  110.910655]  ? __fget+0x111/0x200
[  110.910658]  ? __fget+0x5/0x200
[  110.910663]  SyS_ioctl+0x79/0x90
[  110.910671]  entry_SYSCALL_64_fastpath+0x23/0xc6
[  110.910675] RIP: 0033:0x7fb9370e9bb7
[  110.910678] RSP: 002b:00007fff34e97208 EFLAGS: 00003202 ORIG_RAX:
0000000000000010
[  110.910684] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fb9370e9bb7
[  110.910686] RDX: 00007fff34e97308 RSI: 0000000040406469 RDI: 0000000000000009
[  110.910689] RBP: 0000563782f58c78 R08: 0000000000000040 R09: 0101010101010101
[  110.910691] R10: 00007fff34e90000 R11: 0000000000003202 R12: 00007fff34e96420
[  110.910693] R13: 0000000000000032 R14: 0000000000000010 R15: 0000000000000031

Here the snippet referred above...

[ drivers/base/power/runtime.c ]
...
/**
 * __pm_runtime_resume - Entry point for runtime resume operations.
 * @dev: Device to resume.
 * @rpmflags: Flag bits.
 *
 * If the RPM_GET_PUT flag is set, increment the device's usage count.  Then
 * carry out a resume, either synchronous or asynchronous.
 *
 * This routine may be called in atomic context if the RPM_ASYNC flag is set,
 * or if pm_runtime_irq_safe() has been called.
 */
int __pm_runtime_resume(struct device *dev, int rpmflags)
{
        unsigned long flags;
        int retval;

        might_sleep_if(!(rpmflags & RPM_ASYNC) &&
!dev->power.irq_safe); <--- XXX: Line #1032

        if (rpmflags & RPM_GET_PUT)
                atomic_inc(&dev->power.usage_count);

        spin_lock_irqsave(&dev->power.lock, flags);
        retval = rpm_resume(dev, rpmflags);
        spin_unlock_irqrestore(&dev->power.lock, flags);

        return retval;
}
EXPORT_SYMBOL_GPL(__pm_runtime_resume);
...

Hope this helps.

- Sedat -

View attachment "dmesg_4.10.0-rc1-4-iniza-amd64_after-suspend-resume.txt" of type "text/plain" (69309 bytes)

Download attachment "config-4.10.0-rc1-4-iniza-amd64" of type "application/octet-stream" (140058 bytes)

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