Messages in this thread | | | From | Jari Aalto <> | Subject | Re: 2.6.25 DMA: Out of SW-IOMMU space - Asus M2N32 AMD 8GB memory | Date | Fri, 29 Aug 2008 09:20:05 +0300 |
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Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar> writes:
> When booted kernel with no iommu parameter, it uses the iommu gart > (from amd) and the size of the aperture is 64MB You can try to grow > this size with iommu=memaper=2 for 128MB or 3 for 256MB. I don't have > experience with this, but i read that this, solves the problem.
See my original bug report, which included experiences with memaper. Unofrtunately they didn't help:
REF: http://article.gmane.org/gmane.linux.kernel/725293 (thread start)
but I'll try that once more with this 2.6.26 kernel to double check.
> I have the similar hardware, but when boot in 64 bits, limit the > memory with mem=4G (discarded 0.5G that are (remaped from pci space) > beyond 4G) and iommu=noaperture. (This is not option for you, will be > discard 4G of RAM)
Interestingly 'noaperture' together with 'noagp' has been the best option so far. It gives workign system for about week, but eventually the "out of IOMMU space" messages start appear.
The system has always seen the full 8 GB memory without problems.
> Asus M2N32-SLI DELUXE (BIOS Phoenix ver 1603 [12/17/2007]) > 4 x 1GB OCZ DDR2 PC2-6400 Platinum Rev2 ( OCZ2P800R21G ) > AMD Athlon 64 X2 5200+ ( ADA5200IAA6CS ) (stepping F2)
The only difference to your system is more recent CPU:
$ cat/proc/cpuinfo
processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 107 model name : AMD Athlon(tm) X2 Dual Core Processor BE-2400 stepping : 2 cpu MHz : 2310.516 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow rep_good pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowprefetch bogomips : 4625.06 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp tm stc ...
> I have realiced some test an posted here (sorry in spanish): http://www.pcmasmas.com/viewtopic.php?t=31445
Could you explain this a bit more. Is the mentioned "tip-latest" the current kernel development tree? Should I try to compile this kernel and use it for testing?
Jari
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