On 16/05/2023 11.27, Alexander Bulekov wrote:
On 230516 1105, Thomas Huth wrote:
While trying to use a SCSI disk on the LSI controller with an
older version of Fedora (25), I'm getting:
qemu: warning: Blocked re-entrant IO on MemoryRegion: lsi-mmio at addr: 0x34
Do you have a gdb backtrace for this one or is there some easy way to
reproduce with just a LiveCD or something?
I reproduced it like this:
./qemu-system-x86_64 -accel kvm -m 2G -machine q35 \
-device lsi53c810,id=lsi1 -device scsi-hd,drive=d0 \
-drive if=none,id=d0,file=.../somedisk.qcow2 \
-cdrom Fedora-Everything-netinst-i386-25-1.3.iso
Where somedisk.qcow2 is an image that contains already some partitions and
file systems.
In the boot menu of Fedora, go to "Troubleshooting" -> "Rescue a Fedora
system" -> "3) Skip to shell"
Then check "dmesg | grep -i 53c" for failure messages, and try to mount a
partition from somedisk.qcow2
Marking mmio_io re-entrancy
safe would bring back https://gitlab.com/qemu-project/qemu/-/issues/1563
Maybe there is some other workaround here?
I think we manually have to disallow endless reentrancy in
lsi_execute_script() ... I'm currently doing some experiments there...
Thomas
