* [bisected] i915 regression in post 2.6.36 kernels
@ 2010-11-10 7:02 Johannes Hirte
2010-11-10 7:46 ` Chris Wilson
0 siblings, 1 reply; 6+ messages in thread
From: Johannes Hirte @ 2010-11-10 7:02 UTC (permalink / raw)
To: Chris Wilson; +Cc: Linux Kernel Mailing List
With the latest kernel, I don't get any windows in KDE displayed. After
starting kdm, I get the background picture and the mouse cursor but not the
login window. I can login blindly and a ps on console shows me that the
expected KDE processes are started but still nothing is displayed.
I've bisected this to:
5c12a07e8073295ce8b57a822f811ac34e4f8420 is the first bad commit
commit 5c12a07e8073295ce8b57a822f811ac34e4f8420
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed Sep 22 11:22:30 2010 +0100
drm/i915: Drop ring->lazy_request
We are not currently using it as intended, so remove the complication.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
hardware is a Gigabyte M912 with
00:00.0 Host bridge: Intel Corporation Mobile 945GME Express Memory Controller Hub (rev 03)
Subsystem: Giga-byte Technology Device 1999
Flags: bus master, fast devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=09 <?>
Kernel driver in use: agpgart-intel
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GME Express Integrated Graphics Controller (rev 03) (prog-if 00 [VGA controller])
Subsystem: Giga-byte Technology Device 1999
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at f2200000 (32-bit, non-prefetchable) [size=512K]
I/O ports at 18d0 [size=8]
Memory at d0000000 (32-bit, prefetchable) [size=256M]
Memory at f2300000 (32-bit, non-prefetchable) [size=256K]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Kernel driver in use: i915
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
Subsystem: Giga-byte Technology Device 1999
Flags: bus master, fast devsel, latency 0
Memory at f2280000 (32-bit, non-prefetchable) [disabled] [size=512K]
Capabilities: [d0] Power Management version 2
regards,
Johannes
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [bisected] i915 regression in post 2.6.36 kernels
2010-11-10 7:02 [bisected] i915 regression in post 2.6.36 kernels Johannes Hirte
@ 2010-11-10 7:46 ` Chris Wilson
2010-11-10 22:39 ` Johannes Hirte
0 siblings, 1 reply; 6+ messages in thread
From: Chris Wilson @ 2010-11-10 7:46 UTC (permalink / raw)
To: Johannes Hirte; +Cc: Linux Kernel Mailing List
On Wed, 10 Nov 2010 08:02:19 +0100, Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> wrote:
> With the latest kernel, I don't get any windows in KDE displayed. After
> starting kdm, I get the background picture and the mouse cursor but not the
> login window. I can login blindly and a ps on console shows me that the
> expected KDE processes are started but still nothing is displayed.
> I've bisected this to:
>
> 5c12a07e8073295ce8b57a822f811ac34e4f8420 is the first bad commit
> commit 5c12a07e8073295ce8b57a822f811ac34e4f8420
> Author: Chris Wilson <chris@chris-wilson.co.uk>
> Date: Wed Sep 22 11:22:30 2010 +0100
>
> drm/i915: Drop ring->lazy_request
>
> We are not currently using it as intended, so remove the complication.
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
May I ask you to recheck your bisection, since that was later reverted.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [bisected] i915 regression in post 2.6.36 kernels
2010-11-10 7:46 ` Chris Wilson
@ 2010-11-10 22:39 ` Johannes Hirte
2010-11-12 18:20 ` Florian Mickler
0 siblings, 1 reply; 6+ messages in thread
From: Johannes Hirte @ 2010-11-10 22:39 UTC (permalink / raw)
To: Chris Wilson; +Cc: Linux Kernel Mailing List
On Wednesday 10 November 2010 08:46:40 Chris Wilson wrote:
> On Wed, 10 Nov 2010 08:02:19 +0100, Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> wrote:
> > With the latest kernel, I don't get any windows in KDE displayed. After
> > starting kdm, I get the background picture and the mouse cursor but not the
> > login window. I can login blindly and a ps on console shows me that the
> > expected KDE processes are started but still nothing is displayed.
> > I've bisected this to:
> >
> > 5c12a07e8073295ce8b57a822f811ac34e4f8420 is the first bad commit
> > commit 5c12a07e8073295ce8b57a822f811ac34e4f8420
> > Author: Chris Wilson <chris@chris-wilson.co.uk>
> > Date: Wed Sep 22 11:22:30 2010 +0100
> >
> > drm/i915: Drop ring->lazy_request
> >
> > We are not currently using it as intended, so remove the complication.
> >
> > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
>
> May I ask you to recheck your bisection, since that was later reverted.
> -Chris
Did so. I've started with v2.6.36 for bisect good and
f6614b7bb405a9b35dd28baea989a749492c46b2 for bisect bad (was HEAD) in this
case. Again I ended in 5c12a07e8073295ce8b57a822f811ac34e4f8420 as the first
bad commit. The regression was introduced there, as the commit before is fine.
If it was reverted, the regression should be fixed by this. But I don't find
neither the fix/revert nor the reintroduction of the regression.
regrards,
Johannes
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [bisected] i915 regression in post 2.6.36 kernels
2010-11-10 22:39 ` Johannes Hirte
@ 2010-11-12 18:20 ` Florian Mickler
2010-11-12 20:08 ` Johannes Hirte
0 siblings, 1 reply; 6+ messages in thread
From: Florian Mickler @ 2010-11-12 18:20 UTC (permalink / raw)
To: Johannes Hirte; +Cc: Chris Wilson, Linux Kernel Mailing List
On Wed, 10 Nov 2010 23:39:35 +0100
Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> wrote:
> On Wednesday 10 November 2010 08:46:40 Chris Wilson wrote:
> > On Wed, 10 Nov 2010 08:02:19 +0100, Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> wrote:
> > > With the latest kernel, I don't get any windows in KDE displayed. After
> > > starting kdm, I get the background picture and the mouse cursor but not the
> > > login window. I can login blindly and a ps on console shows me that the
> > > expected KDE processes are started but still nothing is displayed.
> > > I've bisected this to:
> > >
> > > 5c12a07e8073295ce8b57a822f811ac34e4f8420 is the first bad commit
> > > commit 5c12a07e8073295ce8b57a822f811ac34e4f8420
> > > Author: Chris Wilson <chris@chris-wilson.co.uk>
> > > Date: Wed Sep 22 11:22:30 2010 +0100
> > >
> > > drm/i915: Drop ring->lazy_request
> > >
> > > We are not currently using it as intended, so remove the complication.
> > >
> > > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> >
> > May I ask you to recheck your bisection, since that was later reverted.
> > -Chris
>
> Did so. I've started with v2.6.36 for bisect good and
> f6614b7bb405a9b35dd28baea989a749492c46b2 for bisect bad (was HEAD) in this
> case. Again I ended in 5c12a07e8073295ce8b57a822f811ac34e4f8420 as the first
> bad commit. The regression was introduced there, as the commit before is fine.
> If it was reverted, the regression should be fixed by this. But I don't find
> neither the fix/revert nor the reintroduction of the regression.
>
> regrards,
> Johannes
The revert is a56ba56c275b1c2b982c8901ab92bf5a0fd0b757 .
Regards,
Flo
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [bisected] i915 regression in post 2.6.36 kernels
2010-11-12 18:20 ` Florian Mickler
@ 2010-11-12 20:08 ` Johannes Hirte
2010-11-13 22:34 ` Johannes Hirte
0 siblings, 1 reply; 6+ messages in thread
From: Johannes Hirte @ 2010-11-12 20:08 UTC (permalink / raw)
To: Florian Mickler; +Cc: Chris Wilson, Linux Kernel Mailing List
On Friday 12 November 2010 19:20:46 Florian Mickler wrote:
> On Wed, 10 Nov 2010 23:39:35 +0100
> Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> wrote:
>
> > On Wednesday 10 November 2010 08:46:40 Chris Wilson wrote:
> > > On Wed, 10 Nov 2010 08:02:19 +0100, Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> wrote:
> > > > With the latest kernel, I don't get any windows in KDE displayed. After
> > > > starting kdm, I get the background picture and the mouse cursor but not the
> > > > login window. I can login blindly and a ps on console shows me that the
> > > > expected KDE processes are started but still nothing is displayed.
> > > > I've bisected this to:
> > > >
> > > > 5c12a07e8073295ce8b57a822f811ac34e4f8420 is the first bad commit
> > > > commit 5c12a07e8073295ce8b57a822f811ac34e4f8420
> > > > Author: Chris Wilson <chris@chris-wilson.co.uk>
> > > > Date: Wed Sep 22 11:22:30 2010 +0100
> > > >
> > > > drm/i915: Drop ring->lazy_request
> > > >
> > > > We are not currently using it as intended, so remove the complication.
> > > >
> > > > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > >
> > > May I ask you to recheck your bisection, since that was later reverted.
> > > -Chris
> >
> > Did so. I've started with v2.6.36 for bisect good and
> > f6614b7bb405a9b35dd28baea989a749492c46b2 for bisect bad (was HEAD) in this
> > case. Again I ended in 5c12a07e8073295ce8b57a822f811ac34e4f8420 as the first
> > bad commit. The regression was introduced there, as the commit before is fine.
> > If it was reverted, the regression should be fixed by this. But I don't find
> > neither the fix/revert nor the reintroduction of the regression.
> >
> > regrards,
> > Johannes
>
> The revert is a56ba56c275b1c2b982c8901ab92bf5a0fd0b757 .
Thanks for the hint. This was the commit I was searching for. Unfortunately
this version shows the same regression. I've checked again, that
5c12a07e8073295ce8b57a822f811ac34e4f8420 is the first bad version.
2.6.36-rc5-00228-g2896b53 (2896b5397570f6857fd5d0e0533f640b05b1d162) works
2.6.36-rc5-00229-g5c12a07 (5c12a07e8073295ce8b57a822f811ac34e4f8420) doesn't.
Someone with knowledge of the code should have a look what's different
between 5c12a07e8073295ce8b57a822f811ac34e4f8420 and its revert.
regards,
Johannes
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [bisected] i915 regression in post 2.6.36 kernels
2010-11-12 20:08 ` Johannes Hirte
@ 2010-11-13 22:34 ` Johannes Hirte
0 siblings, 0 replies; 6+ messages in thread
From: Johannes Hirte @ 2010-11-13 22:34 UTC (permalink / raw)
To: Chris Wilson; +Cc: Linux Kernel Mailing List, Florian Mickler
On Friday 12 November 2010 21:08:34 Johannes Hirte wrote:
> On Friday 12 November 2010 19:20:46 Florian Mickler wrote:
> > On Wed, 10 Nov 2010 23:39:35 +0100
> > Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> wrote:
> >
> > > On Wednesday 10 November 2010 08:46:40 Chris Wilson wrote:
> > > > On Wed, 10 Nov 2010 08:02:19 +0100, Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de> wrote:
> > > > > With the latest kernel, I don't get any windows in KDE displayed. After
> > > > > starting kdm, I get the background picture and the mouse cursor but not the
> > > > > login window. I can login blindly and a ps on console shows me that the
> > > > > expected KDE processes are started but still nothing is displayed.
> > > > > I've bisected this to:
> > > > >
> > > > > 5c12a07e8073295ce8b57a822f811ac34e4f8420 is the first bad commit
> > > > > commit 5c12a07e8073295ce8b57a822f811ac34e4f8420
> > > > > Author: Chris Wilson <chris@chris-wilson.co.uk>
> > > > > Date: Wed Sep 22 11:22:30 2010 +0100
> > > > >
> > > > > drm/i915: Drop ring->lazy_request
> > > > >
> > > > > We are not currently using it as intended, so remove the complication.
> > > > >
> > > > > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > > >
> > > > May I ask you to recheck your bisection, since that was later reverted.
> > > > -Chris
> > >
> > > Did so. I've started with v2.6.36 for bisect good and
> > > f6614b7bb405a9b35dd28baea989a749492c46b2 for bisect bad (was HEAD) in this
> > > case. Again I ended in 5c12a07e8073295ce8b57a822f811ac34e4f8420 as the first
> > > bad commit. The regression was introduced there, as the commit before is fine.
> > > If it was reverted, the regression should be fixed by this. But I don't find
> > > neither the fix/revert nor the reintroduction of the regression.
> > >
> > > regrards,
> > > Johannes
> >
> > The revert is a56ba56c275b1c2b982c8901ab92bf5a0fd0b757 .
>
> Thanks for the hint. This was the commit I was searching for. Unfortunately
> this version shows the same regression. I've checked again, that
> 5c12a07e8073295ce8b57a822f811ac34e4f8420 is the first bad version.
> 2.6.36-rc5-00228-g2896b53 (2896b5397570f6857fd5d0e0533f640b05b1d162) works
> 2.6.36-rc5-00229-g5c12a07 (5c12a07e8073295ce8b57a822f811ac34e4f8420) doesn't.
> Someone with knowledge of the code should have a look what's different
> between 5c12a07e8073295ce8b57a822f811ac34e4f8420 and its revert.
>
> regards,
> Johannes
I've found it. 5c12a07e8073295ce8b57a822f811ac34e4f8420 contains
static void
@@ -1945,11 +1933,6 @@ i915_gem_flush_ring(struct drm_device *dev,
{
ring->flush(dev, ring, invalidate_domains, flush_domains);
i915_gem_process_flushing_list(dev, flush_domains, ring);
-
- if (ring->outstanding_lazy_request) {
- (void)i915_add_request(dev, file_priv, NULL, ring);
- ring->outstanding_lazy_request = false;
- }
}
which wasn't redone by a56ba56c275b1c2b982c8901ab92bf5a0fd0b757. After adding
those five lines it works for me.
regards,
Johannes
^ permalink raw reply [flat|nested] 6+ messages in thread
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2010-11-10 7:02 [bisected] i915 regression in post 2.6.36 kernels Johannes Hirte
2010-11-10 7:46 ` Chris Wilson
2010-11-10 22:39 ` Johannes Hirte
2010-11-12 18:20 ` Florian Mickler
2010-11-12 20:08 ` Johannes Hirte
2010-11-13 22:34 ` Johannes Hirte
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