[lkml]   [2018]   [Dec]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] drm/i915: Fix i915_gem_wait_for_idle oops due to active_requests check
Quoting Bin Yang (2018-12-20 08:01:35)
> Normally, i915_request_alloc() and i915_request_add() will be called
> in sequence with drm.struct_mutex locked. But in
> intel_vgpu_create_workload(), it will pre-allocate the request and
> call i915_request_add() in the workload thread for performance
> optimization. The above issue will be triggered.

That's your bug. It's not normally, it's a strict requirement that the
struct_mutex (request generation mutex) be held over the course of
generating the request.

 \ /
  Last update: 2018-12-20 09:36    [W:0.035 / U:2.616 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site