Hi everyone, I was wondering if anyone could answer my confusion here. I am using qemu-kvm 0.12.1 installed with centos-6.5. I would like to use large pages to back my guest vm, so I did it as this: http://www.linux-kvm.org/page/UsingLargePages, and added "-mem-path /hugetlbfs" in the command to create VM. When things went well, after creating vm, I type "tail /proc/meminfo", it would show like this, which means "HugePages" was used: [root@mind domain]# tail /proc/meminfo VmallocChunk: 34359481380 kB HardwareCorrupted: 0 kB AnonHugePages: 1368064 kB HugePages_Total: 512 HugePages_Free: 384 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 6144 kB DirectMap2M: 12552192 kB
However if I add "root=/dev/vda1" in the command to create vm, which looks like "-append root=/dev/vda1 console=ttyS0" in command line, then "-mem-path /hugetlbfs" doesn't work: [root@mind domain]# tail /proc/meminfo VmallocChunk: 34359481380 kB HardwareCorrupted: 0 kB AnonHugePages: 1390592 kB HugePages_Total: 512 HugePages_Free: 512 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 6144 kB DirectMap2M: 12552192 kB Does anyone know how does "root=/dev/vda1" conflict with hugepages and how do I use both of them to create a VM? I am actually using an xml file to create VM, and those commands I mentioned above are shown in "ps aux | grep qemu". Thanks, Min-- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
