Re: PR/52438 CVS commit: src/sys/external/bsd/drm2/dist/drm/ttm

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

The following reply was made to PR kern/52438; it has been noted by GNATS.

From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
To: Hauke Fath <hf%spg.tu-darmstadt.de@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, gnats-admin%netbsd.org@localhost
Subject: Re: PR/52438 CVS commit: src/sys/external/bsd/drm2/dist/drm/ttm
Date: Thu, 3 Aug 2017 15:10:23 +0000

 > Date: Thu, 3 Aug 2017 16:16:27 +0200
 > From: Hauke Fath <hf%spg.tu-darmstadt.de@localhost>
 > 
 > Took a while - put debug code in place, and the problem is gone.
 > 
 > Aug  3 14:42:21 Gstoder /netbsd: ttm_dma_tt_init: 
 > bus_dmamap_create(dmat=0xc1114200, size=0x40000, nsegs=64, 
 > maxsegsz=4096, boundary=0, flags=BUS_DMA_WAITOK) failed: 12
 > Aug  3 14:42:21 Gstoder /netbsd: DRM error in radeon_gem_object_create: 
 > Failed to allocate GEM object (262144, 2, 4096, -12)
 
 Interesting.  Not clear to me why bus_dmamap_create(BUS_DMA_WAITOK)
 could fail like this.  Will need to dive into x86/bus_dma.c to make
 some hypotheses.