41a1bde367
With direct submission being disabled while the reset in progress, we have a small window where we may forgo the submission of a new request and not notice its addition during execlists_reset_finish. To close this window, always schedule the submission tasklet on coming out of reset to catch any residual work. <6> [333.144082] i915: Running intel_hangcheck_live_selftests/igt_reset_engines <3> [333.296927] i915_reset_engine(rcs0:idle): failed to idle after reset <6> [333.296932] i915 0000:00:02.0: [drm] rcs0 <6> [333.296934] i915 0000:00:02.0: [drm] Hangcheck 0:a9ddf7a5 [4157 ms] <6> [333.296936] i915 0000:00:02.0: [drm] Reset count: 36048 (global 754) <6> [333.296938] i915 0000:00:02.0: [drm] Requests: <6> [333.296997] i915 0000:00:02.0: [drm] RING_START: 0x00000000 <6> [333.296999] i915 0000:00:02.0: [drm] RING_HEAD: 0x00000000 <6> [333.297001] i915 0000:00:02.0: [drm] RING_TAIL: 0x00000000 <6> [333.297003] i915 0000:00:02.0: [drm] RING_CTL: 0x00000000 <6> [333.297005] i915 0000:00:02.0: [drm] RING_MODE: 0x00000200 [idle] <6> [333.297007] i915 0000:00:02.0: [drm] RING_IMR: fffffeff <6> [333.297010] i915 0000:00:02.0: [drm] ACTHD: 0x00000000_00000000 <6> [333.297012] i915 0000:00:02.0: [drm] BBADDR: 0x00000000_00000000 <6> [333.297015] i915 0000:00:02.0: [drm] DMA_FADDR: 0x00000000_00000000 <6> [333.297017] i915 0000:00:02.0: [drm] IPEIR: 0x00000000 <6> [333.297019] i915 0000:00:02.0: [drm] IPEHR: 0x00000000 <6> [333.297021] i915 0000:00:02.0: [drm] Execlist status: 0x00000001 00000000 <6> [333.297023] i915 0000:00:02.0: [drm] Execlist CSB read 5, write 5 [mmio:7], tasklet queued? no (enabled) <6> [333.297025] i915 0000:00:02.0: [drm] ELSP[0] idle <6> [333.297027] i915 0000:00:02.0: [drm] ELSP[1] idle <6> [333.297028] i915 0000:00:02.0: [drm] HW active? 0x0 <6> [333.297044] i915 0000:00:02.0: [drm] Queue priority hint: -8186 <6> [333.297067] i915 0000:00:02.0: [drm] Q 2afac:5f2+ prio=-8186 @ 50ms: (null) <6> [333.297068] i915 0000:00:02.0: [drm] HWSP: <6> [333.297071] i915 0000:00:02.0: [drm] [0000] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 <6> [333.297073] i915 0000:00:02.0: [drm] * <6> [333.297075] i915 0000:00:02.0: [drm] [0040] 00000001 00000000 00000018 00000002 00000001 00000000 00000018 00000000 <6> [333.297077] i915 0000:00:02.0: [drm] [0060] 00000001 00000000 00008002 00000002 00000000 00000000 00000000 00000005 <6> [333.297079] i915 0000:00:02.0: [drm] [0080] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 <6> [333.297081] i915 0000:00:02.0: [drm] * <6> [333.297083] i915 0000:00:02.0: [drm] [00c0] 00000000 00000000 00000000 00000000 a9ddf7a5 00000000 00000000 00000000 <6> [333.297085] i915 0000:00:02.0: [drm] [00e0] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 <6> [333.297087] i915 0000:00:02.0: [drm] * <6> [333.297089] i915 0000:00:02.0: [drm] Idle? no <6> [333.297090] i915_reset_engine(rcs0:idle): 3000 resets <3> [333.297092] i915/intel_hangcheck_live_selftests: igt_reset_engines failed with error -5 <3> [333.455460] i915 0000:00:02.0: Failed to idle engines, declaring wedged! ... <0> [333.491294] i915_sel-4916 1.... 333262143us : i915_reset_engine: rcs0 flags=4 <0> [333.491328] i915_sel-4916 1.... 333262143us : execlists_reset_prepare: rcs0: depth<-0 <0> [333.491362] i915_sel-4916 1.... 333262143us : intel_engine_stop_cs: rcs0 <0> [333.491396] i915_sel-4916 1d..1 333262144us : process_csb: rcs0 cs-irq head=5, tail=5 <0> [333.491424] i915_sel-4916 1.... 333262145us : intel_gpu_reset: engine_mask=1 <0> [333.491454] kworker/-214 5.... 333262184us : i915_gem_switch_to_kernel_context: awake?=yes <0> [333.491487] kworker/-214 5.... 333262192us : i915_request_add: rcs0 fence 2afac:1522 <0> [333.491520] kworker/-214 5.... 333262193us : i915_request_add: marking (null) as active <0> [333.491553] i915_sel-4916 1.... 333262199us : intel_engine_cancel_stop_cs: rcs0 <0> [333.491587] i915_sel-4916 1.... 333262199us : execlists_reset_finish: rcs0: depth->0 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190313162835.30228-1-chris@chris-wilson.co.uk
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.