[Xen-users] [Xen-Users] Issues with root NFS on Dom0

[Brandon Perez <a0225893@xxxxxx>]

Hello All,

    Here's a quick overview of my setup:
    - Hardware: TI DRA72 Chip, Arm Cortex A15
    - Xen:
        - Version: 4.6-unstable
        - Compiled from source, with some local changes
        - Branch: master
        - Commit: ecdae1cfaa7f6123decaa1b9d7205c3ff726b941
        - Repo URL: git://xenbits.xen.org/xen.git
    - Linux Kernel:
        - Version: 3.14
        - Compiled From source, with some local changes
        - Branch: android-3.14-6AL.1.0
        - Commit: 7b2f1133857414b96927c06f08ed6c440f5472e7
        - Repo URL: git://git.omapzoom.org/kernel/omap.git

    I'm attempting to get an root NFS boot working with a Linux Dom0. 
The boot works, but is horrendously slow. A /bin/sh boot takes several 
minutes, and an init boot takes hours (I gave up on init after 20 
minutes). For comparison, a boot from an SD card takes about 15 seconds.
Also, with a native Linux root NFS boot, the total boot time is about 25 
seconds, so the issue seems to be related with Xen or my Xen configuration.
    I haven't done a lot of debugging yet, so I don't have much 
additional information. Before I go deep into debugging this, I was 
wondering if this is an issue you guys have heard of before. Also, I was 
wondering if there was any immediate things you can think of that might 
be causing this problem.
    One thing I have quickly looked over is /proc/interrupts. For a 
native boot, there are several hundred ethernet transmit interrupts. On 
the Xen boot, there are several million transmit interrupts.
Thanks,

    Brandon Perez

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