From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 62959] r600g (HD 6950 Cayman) fails piglit tests and hangs system
Date: Fri, 05 Apr 2013 23:45:18 +0000
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Date: Fri, 5 Apr 2013 23:45:18 +0000
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https://bugs.freedesktop.org/show_bug.cgi?id=3D62959
--- Comment #13 from Marek Ol=C5=A1=C3=A1k ---
This kernel patch fixes everything:
diff --git a/drivers/gpu/drm/radeon/radeon_cs.c
b/drivers/gpu/drm/radeon/radeon_cs.c
index 70d3824..748a933 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -459,6 +459,7 @@ static int radeon_cs_ib_vm_chunk(struct radeon_device
*rdev,
if (r) {
goto out;
}
+ radeon_fence_wait(vm->fence, false);
radeon_cs_sync_rings(parser);
radeon_ib_sync_to(&parser->ib, vm->fence);
radeon_ib_sync_to(&parser->ib, radeon_vm_grab_id(
It's merely a workaround and it kills performance, but it's now pretty clear
there is a synchronization issue in the kernel affecting all NI chips with
virtual memory, and it should now be easier to find the bug. I'm not really
familiar with the kernel code. I had to do some code reading before I found=
the
right place to put the wait call in.
--=20
You are receiving this mail because:
You are the assignee for the bug.
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Date: Fri, 5 Apr 2013 23:45:18 +0000
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Commen=
t # 13
on bug 62959<=
/a>
from Marek Ol=C5=A1=C3=A1k
This kernel patch fixes everything:
diff --git a/drivers/gpu/drm/radeon/radeon_cs.c
b/drivers/gpu/drm/radeon/radeon_cs.c
index 70d3824..748a933 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -459,6 +459,7 @@ static int radeon_cs_ib_vm_chunk(struct=
radeon_device
*rdev,
if (r) {
goto out;
}
+ radeon_fence_wait(vm->fence, false);
radeon_cs_sync_rings(parser);
radeon_ib_sync_to(&parser->ib, vm->fence);
radeon_ib_sync_to(&parser->ib, radeon_vm_grab_id(
It's merely a workaround and it kills performance, but it's now pretty clear
there is a synchronization issue in the kernel affecting all NI chips with
virtual memory, and it should now be easier to find the bug. I'm not really
familiar with the kernel code. I had to do some code reading before I found=
the
right place to put the wait call in.
You are receiving this mail because:
=20=20=20=20=20=20
- You are the assignee for the bug.
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