[Bug 41838] Kernel Crash/Hanging system in connection between WebKit and Gnome-Shell

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=41838

--- Comment #30 from Peter Weber <peter.weber at ttyhoney.com> 2011-11-07 11:10:52 PST ---
(In reply to comment #29)
> Host Data Path.  It's the interface for accessing vram via the CPU.  E.g., when
> you access a buffer in vram via the PCI FB BAR, it goes through the HDP on the
> GPU.  Unfortunately, bugzilla.kernel.org is down so I don't remember exactly
> what bug the r600_ioctl_wait_idle patch fixed.  It's possible you just aren't
> hitting the case in your particular desktop scenario, but that removing it
> would regress other cases.  I'm leery of applying it until I have some
> confirmation that someone else is hitting this bug or that it doesn't regress
> any other cases.

Thanks for your description. I'm understand that you are careful.

> What sort of problems are you seeing?

The compiler complaint about something in "r300..." buth honestly I don't
remember it really.

> That's the nature of complex 3D engines.

I understand! But we are lucky to have you and your co-workers at AMD :-)




Okay. I tried to apply the patch, but I doesn't work.

[peter at cupcake linux-3.1]$ patch -p1 --dry-run < ~/flush_hdp_via_the_ring.patch 
patching file drivers/gpu/drm/radeon/evergreen_blit_kms.c
Hunk #1 FAILED at 625.
1 out of 1 hunk FAILED -- saving rejects to file
drivers/gpu/drm/radeon/evergreen_blit_kms.c.rej
patching file drivers/gpu/drm/radeon/r600.c
Hunk #1 FAILED at 2331.
Hunk #2 succeeded at 2342 (offset -11 lines).
1 out of 2 hunks FAILED -- saving rejects to file
drivers/gpu/drm/radeon/r600.c.rej
patching file drivers/gpu/drm/radeon/r600_blit_kms.c
Hunk #1 FAILED at 503.
1 out of 1 hunk FAILED -- saving rejects to file
drivers/gpu/drm/radeon/r600_blit_kms.c.rej
patching file drivers/gpu/drm/radeon/radeon_asic.c


I'm afraid you created the patch against a different kernel? Is it current git?

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