| Summary: | unable to handle kernel NULL pointer dereference at (null) | ||||||
|---|---|---|---|---|---|---|---|
| Product: | xorg | Reporter: | bugs.freedesktop.org | ||||
| Component: | Driver/nouveau | Assignee: | Nouveau Project <nouveau> | ||||
| Status: | RESOLVED FIXED | QA Contact: | Xorg Project Team <xorg-team> | ||||
| Severity: | normal | ||||||
| Priority: | medium | ||||||
| Version: | 7.4 (2008.09) | ||||||
| Hardware: | x86-64 (AMD64) | ||||||
| OS: | Linux (All) | ||||||
| Whiteboard: | |||||||
| i915 platform: | i915 features: | ||||||
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NULL pointer dereference in nv50_vm_map_sg was fixed in 3.1-rc4 (commits 8d3bb23609d4ae22803a15d232289fc09a7b61c4 and eac2095398668f989a3dd8d00be1b87850d78c01) I'm not sure about the other errors. It looks like there is a VRAM leak somewhere. Can you test Nouveau Linux tree (*), with kmemleak enabled (if possible)? (*) http://nouveau.freedesktop.org/wiki/InstallDRM Yes, a kernel update fixed the NULL pointer dereference for me. I do not experience the memory problem any more since I use kwin 4.8.0. I still can not explain why killing kwin/X did not release the occupied memory, but since I do not experience problems any more and I can not give more detail, I mark this bug as resolved. |
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Created attachment 50801 [details] Important parts of my logs. I am getting the attached Errors since I am using kwin 4.7.0 with OpenGL-ES. I am not sure if the following is related: When I am changing window sizes several times my memory gets filled up. The memory is not released by restarting kwin or X. When I filled my memory by doing this, I do not have to wait long for the attached Error, but I do not know what triggers it exactly. Occasionally, I also have thousands of messages of the following form in my logs: Aug 08 18:06:09 [kernel] [ 3810.714471] [TTM] Failed to find memory space for buffer 0xffff8800bc392000 eviction. Aug 08 18:06:09 [kernel] [ 3810.714476] [TTM] No space for ffff8800bc392000 (96 pages, 384K, 0M) Aug 08 18:06:09 [kernel] [ 3810.714479] [TTM] placement[0]=0x00070002 (1) Aug 08 18:06:09 [kernel] [ 3810.714480] [TTM] has_type: 1 Aug 08 18:06:09 [kernel] [ 3810.714482] [TTM] use_type: 1 Aug 08 18:06:09 [kernel] [ 3810.714484] [TTM] flags: 0x0000000A Aug 08 18:06:09 [kernel] [ 3810.714485] [TTM] gpu_offset: 0x00000000 Aug 08 18:06:09 [kernel] [ 3810.714487] [TTM] size: 131072 Aug 08 18:06:09 [kernel] [ 3810.714489] [TTM] available_caching: 0x00070000 Aug 08 18:06:09 [kernel] [ 3810.714491] [TTM] default_caching: 0x00010000 This is the reason, why I did not upload full logs (all in all 40MB). Nevertheless, I can upload more logs if you wish so. As you can see in the logs, I have this problem since several kernel versions. My graphics card: GeForce 8600 GT Some version information (only applicable for the last logged crash): sys-kernel/gentoo-sources-3.0.1 x11-base/xorg-x11-7.4-r1 x11-drivers/xf86-video-nouveau-0.0.16_pre20110801 x11-libs/libdrm-2.4.26 media-libs/mesa-7.11