On Tue, Aug 13, 2013 at 6:37 PM, Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote: > On Tue, Aug 13, 2013 at 6:34 PM, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote: >> On Tue, Aug 13, 2013 at 06:23:29PM +0200, Sedat Dilek wrote: >>> On Tue, Aug 13, 2013 at 5:59 PM, Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote: >>> > I have bisected the issue on Linux v3.11-rc5 + drm-intel-nightly: >>> > >>> > 5456fe3882812aba251886e36fe55bfefb8e8829 is the first bad commit >>> > commit 5456fe3882812aba251886e36fe55bfefb8e8829 >>> > Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> >>> > Date: Thu Aug 8 14:41:07 2013 +0100 >>> > >>> > drm/i915: Allocate LLC ringbuffers from stolen >>> > >>> > As stolen objects now behave identically (wrt to default LLC cacheing) >>> > as their normal system counterparts, we no longer have to differentiate >>> > our usage for ringbuffers. So allocate them from stolen on SNB+ as well. >>> > >>> > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> >>> > Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> >>> > Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx> >>> > >>> > :040000 040000 de063a052f39095f4d2f51b49caef9f827df41e8 >>> > 1c819aa5501a9fcc9912a5c7c037c71b9b9e9a6b M drivers >>> > >>> > See also attached files! >>> > >>> >>> With the attached revert-patch my system is OK (with my customized X stack). >> >> No indication of a GPU hang? I'm puzzled as to how this ends up with the >> scanout being misread. >> >> cat /sys/kernel/debug/dri/0/i915_gem_stolen >> cat /sys/kernel/debug/dri/0/i915_gem_framebuffer >> >> would be interesting. > > With revert-patch applied: > > $ sudo cat /sys/kernel/debug/dri/0/i915_gem_stolen > Stolen: > ffff88007f6f5200: p g 4128KiB 77 00 0 0 0 uncached (name: 1) > (pinned x 1) (display) (ggtt offset: 00072000, size: 00408000) > (stolen: 00000000) (p mappable) > Total 1 objects, 4227072 bytes, 4227072 GTT size > > $ sudo cat /sys/kernel/debug/dri/0/i915_gem_framebuffer > fbcon size: 1366 x 768, depth 24, 32 bpp, refcount 2, obj > ffff88007f6f5200: p g 4128KiB 77 00 0 0 0 uncached (name: 1) > (pinned x 1) (display) (ggtt offset: 00072000, size: 00408000) > (stolen: 00000000) (p mappable) > user size: 1366 x 768, depth 24, 32 bpp, refcount 3, obj > ffff88007f6f5080: pXg 5120KiB 36 02 124873 124873 0 uncached dirty > (name: 3) (pinned x 1) (display) (fence: 0) (ggtt offset: 0047a000, > size: 00500000) (p mappable) (blitter ring) > Attached both outputs with GOOD and BAD (BROKEN) kernel. - Sedat -
fbcon size: 1366 x 768, depth 24, 32 bpp, refcount 2, obj ffff880074492e40: p g 4128KiB 77 00 0 0 0 uncached (name: 1) (pinned x 1) (display) (ggtt offset: 00072000, size: 00408000) (stolen: 00000000) (p mappable) user size: 1366 x 768, depth 24, 32 bpp, refcount 3, obj ffff880074492840: pXg 5120KiB 36 02 158126 158126 0 uncached dirty (name: 3) (pinned x 1) (display) (fence: 0) (ggtt offset: 0047a000, size: 00500000) (p mappable) (blitter ring)
fbcon size: 1366 x 768, depth 24, 32 bpp, refcount 2, obj ffff880073995200: p g 4128KiB 77 00 0 0 0 uncached (name: 1) (pinned x 1) (display) (ggtt offset: 00072000, size: 00408000) (stolen: 00060000) (p mappable) user size: 1366 x 768, depth 24, 32 bpp, refcount 3, obj ffff8800736d8e00: pXg 5120KiB 36 02 -737 -737 0 uncached dirty (name: 3) (pinned x 1) (display) (fence: 0) (ggtt offset: 0047a000, size: 00500000) (p mappable) (blitter ring)
Stolen: ffff880074492e40: p g 4128KiB 77 00 0 0 0 uncached (name: 1) (pinned x 1) (display) (ggtt offset: 00072000, size: 00408000) (stolen: 00000000) (p mappable) Total 1 objects, 4227072 bytes, 4227072 GTT size
Stolen: ffff880073995c80: p g 128KiB 40 40 0 0 0 snooped or LLC dirty (pinned x 1) (ggtt offset: 00001000, size: 00020000) (stolen: 00000000) (p mappable) ffff880073995800: p g 128KiB 40 40 0 0 0 snooped or LLC dirty (pinned x 1) (ggtt offset: 00023000, size: 00020000) (stolen: 00020000) (p mappable) ffff880073995500: p g 128KiB 40 40 0 0 0 snooped or LLC dirty (pinned x 1) (ggtt offset: 00044000, size: 00020000) (stolen: 00040000) (p mappable) ffff880073995200: p g 4128KiB 77 00 0 0 0 uncached (name: 1) (pinned x 1) (display) (ggtt offset: 00072000, size: 00408000) (stolen: 00060000) (p mappable) Total 4 objects, 4620288 bytes, 4620288 GTT size
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