Home » Mailing list archives » linux-kernel » 2008 » August » 28

Re: 2.6.25 DMA: Out of SW-IOMMU space - Asus M2N32 AMD 8GB memory

Previous thread: Too many stupid questions about the block layer by Roni Feldman on Thursday, August 28, 2008 - 1:38 pm. (1 message)

Next thread: [RFC] export irq_set/get_affinity() for multiqueue network drivers by Brice Goglin on Thursday, August 28, 2008 - 1:21 pm. (7 messages)
[view original message]
From: Jari Aalto
Subject: Re: 2.6.25 DMA: Out of SW-IOMMU space - Asus M2N32 AMD 8GB memory
Date: Thursday, August 28, 2008 - 1:49 pm

REF: http://article.gmane.org/gmane.linux.kernel/725293 (thread start)

I regret to report that:

- Upgraded to kernel 2.6.26-1-amd64 (Debian/unstable 2.6.26-3)

$ grep -Ei 'iommu|agp' /boot/config-2.6.26-1-amd64
CONFIG_GART_IOMMU=y
CONFIG_CALGARY_IOMMU=y
CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT=y
CONFIG_IOMMU_HELPER=y
CONFIG_AGP=y
CONFIG_AGP_AMD64=y
CONFIG_AGP_INTEL=m
CONFIG_AGP_SIS=m
CONFIG_AGP_VIA=m
# CONFIG_IOMMU_DEBUG is not set

- Rebooted without 'iommu' parameter. dmesg:

[    0.000000] Kernel command line: root=UUID=cb9d814f-d885-435b-8e6d-ac17c0ac5aa1 ro quiet vga=0x317 swiotlb=32768
[    0.004000] Checking aperture...
[    0.004000] Node 0: aperture @ 4000000 size 32 MB
[    0.004000] Aperture pointing to e820 RAM. Ignoring.
[    0.004000] No AGP bridge found
[    0.004000] Your BIOS doesn't leave a aperture memory hole
[    0.004000] Please enable the IOMMU option in the BIOS setup
[    0.004000] This costs you 64 MB of RAM
[    0.004000] Mapping aperture over 65536 KB of RAM @ 4000000
...
[    0.374935] PCI-DMA: Disabling AGP.
[    0.374935] PCI-DMA: aperture base @ 4000000 size 65536 KB
[    0.374935] PCI-DMA: using GART IOMMU.
[    0.374935] PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture


- The syslog after boot reads:

Aug 28 20:18:28 jondo kernel: [972060.192696] DMA: Out of SW-IOMMU space for 24576 bytes at device 0000:00:0d.0
Aug 28 20:18:28 jondo kernel: [972060.192760] ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Aug 28 20:18:28 jondo kernel: [972060.196705] ata3.00: cmd ca/00:60:c1:91:5f/00:00:00:00:00/e8 tag 0 dma 49152 out
Aug 28 20:18:28 jondo kernel: [972060.196707]          res 50/00:00:bf:cf:b5/00:00:71:00:00/ea Emask 0x40 (internal error)
Aug 28 20:18:28 jondo kernel: [972060.200700] ata3.00: status: { DRDY }
Aug 28 20:18:28 jondo kernel: [972060.231128] ata3.00: configured for UDMA/133
Aug 28 20:18:28 jondo kernel: [972060.231137] ata3: EH complete
Aug 28 20:18:28 jondo kernel: [972060.231148] DMA: Out of ...
[ message continues ]
[view original message]
From: Yinghai Lu
Subject: Re: 2.6.25 DMA: Out of SW-IOMMU space - Asus M2N32 AMD 8GB memory
Date: Thursday, August 28, 2008 - 1:59 pm

can you send out whole boot log? with "debug initcall_debug"

http://people.redhat.com/mingo/tip.git/readme.txt

YH
--


[ message continues ]
Previous thread: Too many stupid questions about the block layer by Roni Feldman on Thursday, August 28, 2008 - 1:38 pm. (1 message)

Next thread: [RFC] export irq_set/get_affinity() for multiqueue network drivers by Brice Goglin on Thursday, August 28, 2008 - 1:21 pm. (7 messages)