I'm seeing a qtest hang in the /x86_64/ahci/io/ncq/simple
test case. It looks like QEMU is running OK, but the qtest test
is busy-looping in ahci_command_wait():
#0 ahci_command_wait (ahci=0x1003f3f9400, cmd=0x1003f401810) at
/home/pm215/qemu/tests/libqos/ahci.c:929
#1 0x000000001001ba10 in ahci_command_issue (ahci=0x1003f3f9400,
cmd=0x1003f401810)
at /home/pm215/qemu/tests/libqos/ahci.c:937
#2 0x0000000010019f18 in ahci_guest_io (ahci=0x1003f3f9400, port=5
'\005', ide_cmd=97 'a', buffer=1097728,
bufsize=4096, sector=0) at /home/pm215/qemu/tests/libqos/ahci.c:632
#3 0x000000001000b640 in ahci_test_io_rw_simple (ahci=0x1003f3f9400,
bufsize=4096, sector=0, read_cmd=
96 '`', write_cmd=97 'a') at /home/pm215/qemu/tests/ahci-test.c:886
#4 0x000000001000d434 in test_ncq_simple () at
/home/pm215/qemu/tests/ahci-test.c:1439
#5 0x00000080753db01c in 000000ca.plt_call.strncasecmp@@GLIBC_2.3+0
() from /lib64/libglib-2.0.so.0
#6 0x00000080753db1f8 in 000000ca.plt_call.strncasecmp@@GLIBC_2.3+0
() from /lib64/libglib-2.0.so.0
#7 0x00000080753db1f8 in 000000ca.plt_call.strncasecmp@@GLIBC_2.3+0
() from /lib64/libglib-2.0.so.0
#8 0x00000080753db1f8 in 000000ca.plt_call.strncasecmp@@GLIBC_2.3+0
() from /lib64/libglib-2.0.so.0
#9 0x00000080753db1f8 in 000000ca.plt_call.strncasecmp@@GLIBC_2.3+0
() from /lib64/libglib-2.0.so.0
#10 0x00000080753db6c0 in .g_test_run_suite () from /lib64/libglib-2.0.so.0
#11 0x00000080753db778 in .g_test_run () from /lib64/libglib-2.0.so.0
#12 0x000000001000de70 in main (argc=1, argv=0x3fffeeb5a578) at
/home/pm215/qemu/tests/ahci-test.c:1703
If you singlestep, we just loop round and round. Presumably
the condition we're expecting just never becomes true.
I've only seen this on a ppc64 host system; my x86-64 and arm
'make check' runs have been fine. Have you tested your AHCI
qtest code on a big endian system? (Not necessarily the
problem, Paolo also said he'd seen an intermittent failure
in one of these ahci tests on an x86 host. But the ppc fail
seems to be reliably always on the same test.)
thanks
-- PMM
