Warning Messages Appear During Bootup And In Log Files (Crs 6862766, 6861903, And 6890263); Vmware Esxi 5.5 Does Not Support Mmio Regions Above 4Gb (16480679, 17013064) - Oracle Sun Fire X4800 Product Notes

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The configuration is complete but it is not yet permanent.
10. After the host has booted, open the vSphere Client and connect to the host.
11. Select the Configuration tab.
12. Change the memory properties of the ESX host to permanently reduce the RAM
assignment.
Warning Messages Appear During Bootup and in Log Files
(CRs 6862766, 6861903, and 6890263)
Various warning messages appear during bootup, and in log files such as /var/log/
vmkwarning. These can be ignored, as they have no impact on performance.
Sample messages include:
Sep 24 02:05:07 mpk12-3214-189-114 vmkernel: 0:00:00:24.984
cpu0:4096: WARNING PCI: 1861: No such device
Sep 24 02:05:07 mpk12-3214-189-114 last message repeated 9 times
Sep 24 02:05:07 mpk12-3214-189-114 vmkernel: 0:00:01:03.280 cpu49:4166)WARNING:
vmklinux26: dma_alloc_coherent: Out of memory
Sep 24 04:13:21 mpk12-3214-189-114 vmkernel: 0:00:00:38.761 cpu0:4096)WARNING:
PCI: 1861: No such device
Sep 24 04:13:21 mpk12-3214-189-114 last message repeated 9 times
Sep 24 04:13:22 mpk12-3214-189-114 vmkernel: 0:00:01:19.828 cpu16:4166)WARNING:
vmklinux26: dma_alloc_coherent: Out of memory
VMware ESXi 5.5 Does Not Support MMIO Regions Above
4GB (16480679, 17013064)
The Sun Server X4800 defaults in BIOS to 64-bit MMIO (Memory Mapped I/O). This allows
additional PCIe memory address space to be mapped above the standard 32-bit 4GB of space
for PCIe cards that include option ROMs. However, VMware ESXi is incompatible with MMIO
space above the standard 4GB. This issue can cause some PCIe cards not to function properly
with ESXi.
Workaround
As a possible workaround, disable 64-bit MMIO through the server's BIOS Setup utility (under
the IO > PCIe Subsystem Settings > PCI 64-bit Resources Allocation menu). This workaround
has limitations. With some combinations of option cards, the system will require more MMIO

Warning Messages Appear During Bootup and in Log Files (CRs 6862766, 6861903, and 6890263)

ESX Issues
69

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