[Qemu-devel] [Bug 897193] Re: virtfs: kernel compile fails

[Avishay Traeger]

Hi,

I am running qemu as root.

The output from strace for the command that you requested shows that this is 
the problem:
rename(".tmpconfig.h", "include/generated/autoconf.h") = -1 ENOENT (No such 
file or directory)

The command fails because the directory 'include/generated' doesn't
exist because I ran only the command you mentioned, and not 'make'.

So I attached the output for: strace -f make &> /tmp/strace.out

Hope that helps, and thanks!

** Attachment added: "strace output for make"
   
https://bugs.launchpad.net/qemu/+bug/897193/+attachment/2612472/+files/strace.out

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https://bugs.launchpad.net/bugs/897193

Title:
  virtfs: kernel compile fails

Status in QEMU:
  New

Bug description:
  I am trying to compile a kernel under virtfs, and am getting an error.
  The error does not occur when compiling outside of the virtfs mount.

  Both guest and host are running the 3.0.4 kernel.
  QEMU is latest from git: bc75c9e50d308b2ec6623a40179c5cdc84b63dae

  QEMU command line:
  /usr/local/bin/qemu-system-x86_64 -nographic -boot c -m 1024 -machine 
type=pc,accel=kvm -drive file=/root/hdd1.img,if=virtio -drive 
file=/root/test1.img,if=virtio -drive file=/root/test2.img,if=virtio -virtfs 
local,path=/mnt/virtfs,security_model=none,mount_tag=virtfs -net 
nic,model=virtio,macaddr=DE:AD:BE:EF:AA:BB -net tap,ifname=qtap0,script=no

  virtfs line in /etc/fstab:
  virtfs                  /mnt/virtfs             9p      
defaults,noauto,trans=virtio    0 0

  Steps to reproduce and output:

  address@hidden linux-3.0.4]# make mrproper
    CLEAN   scripts/basic
    CLEAN   scripts/kconfig
    CLEAN   include/config include/generated
    CLEAN   .config .config.old
  address@hidden linux-3.0.4]# make defconfig
    HOSTCC  scripts/basic/fixdep
    HOSTCC  scripts/kconfig/conf.o
    SHIPPED scripts/kconfig/zconf.tab.c
    SHIPPED scripts/kconfig/lex.zconf.c
    SHIPPED scripts/kconfig/zconf.hash.c
    HOSTCC  scripts/kconfig/zconf.tab.o
    HOSTLD  scripts/kconfig/conf
  *** Default configuration is based on 'x86_64_defconfig'
  #
  # configuration written to .config
  #
  address@hidden linux-3.0.4]# make
  scripts/kconfig/conf --silentoldconfig Kconfig

  *** Error during update of the configuration.

  make[2]: *** [silentoldconfig] Error 1
  make[1]: *** [silentoldconfig] Error 2
  make: *** No rule to make target `include/config/auto.conf', needed by 
`include/config/kernel.release'.  Stop.

  
  Please let me know if you need any other information.  Thanks!

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