On a brand new hardware (HP ProLiant BL460c Gen8, BIOS I31, dual Xeon E5-2670 with 64Gig's of ram) with clean minimal network install of Centos x86_64 issued problems with dma and lot's of messages about DRHD/INTR-REMAP.<br />
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Here is dmesg log after boot <a href="http://pastebin.com/FhzMsMD6">http://pastebin.com/FhzMsMD6</a> [<a href="http://pastebin.com/FhzMsMD6" target="_blank">^</a>] .<br />
Here is lspci -vv log <a href="http://pastebin.com/0i4fj3nS">http://pastebin.com/0i4fj3nS</a> [<a href="http://pastebin.com/0i4fj3nS" target="_blank">^</a>] .<br />
Kernel 2.6.32-279.2.1.el6.x86_64.<br />
Default bios settings.<br />
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After all kind of network load none of the counters in /sys/class/dma*/memcpy_count incremented.<br />
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Adding intel_iommu=off to the kernel command line in grub nothing changed.<br />
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For example Gentoo kernel branch 3.3.* works good without such errors.
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