armv7 guest on aarch64 host giving I/O errors

[Richard W.M. Jones]

https://bugzilla.redhat.com/show_bug.cgi?id=2004120

qemu-6.1.0-7.fc36.aarch64
Host kernel: 5.14.0-60.fc35.aarch64
Guest kernel: 5.14.1-300.fc35.armv7hl+lpae

Under I/O load, I get intermittent write errors inside the Fedora
armv7 guest running on aarch64 host.

[ 2063.691215] print_req_error: 6 callbacks suppressed
[ 2063.691249] blk_update_request: I/O error, dev vda, sector 8990744 op 
0x1:(WRITE) flags 0x100000 phys_seg 60 prio class 0
[ 2063.713844] blk_update_request: I/O error, dev vda, sector 8992744 op 
0x1:(WRITE) flags 0x104000 phys_seg 254 prio class 0
[ 2063.722337] blk_update_request: I/O error, dev vda, sector 8994992 op 
0x1:(WRITE) flags 0x100000 phys_seg 2 prio class 0
[ 2063.730617] blk_update_request: I/O error, dev vda, sector 8995008 op 
0x1:(WRITE) flags 0x104000 phys_seg 191 prio class 0
[ 2063.745903] blk_update_request: I/O error, dev vda, sector 8997568 op 
0x1:(WRITE) flags 0x100000 phys_seg 65 prio class 0
[ 2063.760612] blk_update_request: I/O error, dev vda, sector 8998552 op 
0x1:(WRITE) flags 0x104000 phys_seg 158 prio class 0
[ 2063.774761] blk_update_request: I/O error, dev vda, sector 9001112 op 
0x1:(WRITE) flags 0x100000 phys_seg 98 prio class 0
[ 2063.785913] blk_update_request: I/O error, dev vda, sector 9002712 op 
0x1:(WRITE) flags 0x104000 phys_seg 234 prio class 0
[ 2063.798290] blk_update_request: I/O error, dev vda, sector 9005272 op 
0x1:(WRITE) flags 0x100000 phys_seg 120 prio class 0

On the host side, no errors are seen, so it doesn't look like
this is an actual I/O error.

Is there anything I can do to debug this further?

Rich.

-- 
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