seabios unable to boot from iscsi disk in a vm with 11 virtio disks and 1 iscsi disk.

[Yiguang Chen]

The seabios version is ref-1.13.0.
I have a qemu vm with 11 virtio disks and 1 iscsi disk. The iscsi disk has a bootable windows system and the bootorder is '1'. When the vm start, the seabios show me "No bootable device". 

[Yiguang Chen]

The 00:07.0 refers to the iscsi disk. The seabios debug info is as follows:
-----------------------------------
init virtio-scsi
phys_alloc zone=0x7ffbfe78 size=4096 align=1000 ret=7ffa7000 (detail=0x7ffa9390)
/7ffa7000\ Start thread
|7ffa7000| found virtio-scsi at 00:07.0
|7ffa7000| phys_alloc zone=0x7ffbfe84 size=55 align=10 ret=7ffdffc0 (detail=0x7ffa8760)
|7ffa7000| pci dev 00:07.0 virtio cap at 0x84 type 5 [pci cfg access]
|7ffa7000| pci dev 00:07.0 virtio cap at 0x70 type 2 bar 4 at 0xfea00000 off +0x3000 [mmio]
|7ffa7000| pci dev 00:07.0 virtio cap at 0x60 type 4 bar 4 at 0xfea00000 off +0x2000 [mmio]
|7ffa7000| pci dev 00:07.0 virtio cap at 0x50 type 3 bar 4 at 0xfea00000 off +0x1000 [mmio]
|7ffa7000| pci dev 00:07.0 virtio cap at 0x40 type 1 bar 4 at 0xfea00000 off +0x0000 [mmio]
|7ffa7000| pci dev 00:07.0 using modern (1.0) virtio mode
|7ffa7000| vp write&nbsp; fea00014 (1) <- 0x0
|7ffa7000| vp read&nbsp; &nbsp;fea01000 (1) -&gt; 0x0
|7ffa7000| vp write&nbsp; fea00014 (1) <- 0x3
|7ffa7000| vp write&nbsp; fea00000 (4) <- 0x0
|7ffa7000| vp read&nbsp; &nbsp;fea00004 (4) -&gt; 0x30000006
|7ffa7000| vp write&nbsp; fea00000 (4) <- 0x1
|7ffa7000| vp read&nbsp; &nbsp;fea00004 (4) -&gt; 0x1
|7ffa7000| vp write&nbsp; fea00008 (4) <- 0x0
|7ffa7000| vp write&nbsp; fea0000c (4) <- 0x0
|7ffa7000| vp write&nbsp; fea00008 (4) <- 0x1
|7ffa7000| vp write&nbsp; fea0000c (4) <- 0x1
|7ffa7000| vp write&nbsp; fea00014 (1) <- 0xb
|7ffa7000| vp read&nbsp; &nbsp;fea00014 (1) -&gt; 0xb
|7ffa7000| WARNING - Unable to allocate resource at vp_find_vq:301!
|7ffa7000| fail to find vq for virtio-scsi 00:07.0
|7ffa7000| vp write&nbsp; fea00014 (1) <- 0x0
|7ffa7000| vp read&nbsp; &nbsp;fea01000 (1) -&gt; 0x0
|7ffa7000| phys_free 7ffdffc0 (detail=0x7ffa8760)
\7ffa7000/ End thread
phys_free 7ffa7000 (detail=0x7ffa9390)

-----------------------------------
I wonder how can I diagnose this problem and how to deal with?
Best Regards,
Yiguang

[Gerd Hoffmann]

> |7ffa7000| WARNING - Unable to allocate resource at vp_find_vq:301!
> I wonder how can I diagnose this problem and how to deal with?

seabios runs out of memory.

You can try update to 1.14 and use "qemu -boot strict=on".  seabios will
only initialize devices with bootindex then, which should reduce the
amount of memory needed to manage disks.

HTH,
  Gerd