Messages in this thread | | | From | Chris Wilson <> | Subject | Re: [PATCH 1/2] drm/i915: Preallocate our mmu notifier workequeu to unbreak cpu hotplug deadlock | Date | Fri, 06 Oct 2017 10:23:46 +0100 |
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Quoting Daniel Vetter (2017-10-06 10:06:36) > 4.14-rc1 gained the fancy new cross-release support in lockdep, which > seems to have uncovered a few more rules about what is allowed and > isn't. > > This one here seems to indicate that allocating a work-queue while > holding mmap_sem is a no-go, so let's try to preallocate it.
But you haven't mentioned why we might want to preallocate to reduce the mmap/mm_lock coverage anyway. -Chris
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