sata problem in kvm-qemu

[Dmitriy Tochansky]

Hi there!

Playing around dfly in qemu-kvm and see strange behavior with sata.
I have to identical virt-machines on one hardware host. The only 
difference is that one virtual machine emulated sata and another "uses" 
ide disk.

In dmesg of "sata"-machine appears:
------------
ahci0.0: CMD TIMEOUT state=5 slot=9
	glb-status 0x00000000
	cmd-reg 0xc017<CR,FR,FRE,POD,SUD,ST>
	port_status 0x4<DSS>
	sactive=00000200 active=00000000 expired=00000000
	   sact=00000000     ci=00000000
	    STS=50
ahci0.0: disk_rw: timeout
ahci0.0: CMD TIMEOUT state=5 slot=6
	glb-status 0x00000000
	cmd-reg 0xc017<CR,FR,FRE,POD,SUD,ST>
	port_status 0x4<DSS>
	sactive=00000040 active=00000000 expired=00000000
	   sact=00000000     ci=00000000
	    STS=50
----------
and so on.

Hardware host seems to be fine - several machines work nice, some of 
them uses "sata" but OS is linux.

toch at h2% uname -a
DragonFly h2.tochlab.net 4.2-RELEASE DragonFly 9f8828a-RELEASE #2: Fri 
Aug  7 23:02:06 MSK 2015     
toch at h2.tochlab.net:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64


-- 
dtoch