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