Re: [Qemu-devel] Qemu crashed with lsi booting

[Paolo Bonzini]

Il 26/07/2012 10:31, Frediano Ziglio ha scritto:
> sudo ./x86_64-softmmu/qemu-system-x86_64 -m 1024 -hda test.qcow
> -device lsi -drive file=/dev/sdb,if=none,id=XXX -device
> scsi-block,drive=XXX -enable-kvm -bios ~/seabios/out/bios.bin -serial
> file:out.txt
> lsi_scsi: error: Multiple IO pending for request 0x7fd1075bf100
> qemu-system-x86_64: /home/fredianoz/qemu/hw/lsi53c895a.c:774:
> lsi_do_command: Assertion `s->current == ((void *)0)' failed.
> 
> (sometimes I don't get the "Multiple IO ending" line).
> 
> I'm using a recent SeaBIOS which support booting from LSI SCSI.
> 
> Qemu version
> 
> $ git branch -v
> * master 61dc008 Revert "audio: Make PC speaker audio card available by 
> default"
> 
> I'm using SeaBIOS commit 9d6bac1d32b72cdf7c0ad009c1371a2e69084de3
> (some minor changes in order to support 4k sectors).

Can you share them?  4k sectors are not supported by BIOS at all
AFAIK...  Does virtio-scsi work with those changes?

> Adding some debugging to SeaBIOS lsi code seems that drivers send
> initial INQUIRY request but after that all requests have some problems
> and lead to a lot of reset command.

Can you gather tracing output for the following events:

scsi_req_data
scsi_req_dequeue
scsi_req_parsed
scsi_req_parse_bad
scsi_req_build_sense
scsi_inquiry
scsi_test_unit_ready

(Perhaps you can also instrument scsi_req_cancel for tracing).

The timing doesn't matter, so you can use the stderr backend:

--enable-trace-backend=stderr

Place the above list in a file (one tracepoint per line) and then start
QEMU with -trace events=/path/to/file.txt.

You could also try github.com/bonzini/qemu.git, branch scsi-next (it
shouldn't fix anything, but I added a couple more assertions).

Paolo