From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: Question about using "qemu-kvm" to create vm including "-mem-path"
Date: Wed, 10 Sep 2014 10:04:17 +0200
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Il 10/09/2014 01:54, Min Du ha scritto:
> 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".

There should be no conflict.  Try reproducing with a more recent version
of QEMU.

Paolo