Package: qemu-system-x86_64 root@libvirt-debian-9:/home/qemu# qemu-system-x86_64 -version QEMU emulator version 2.8.1(Debian 1:2.8+dfsg-6+deb9u5)
While host is in load, (repoduced 100% while doing kernel compilation) if I try
to run qemu with tcg mode it crashes consistently:
ex: Set guest startup RAM size to X megs with:
root@libvirt-debian-9:/home/qemu# gdb --args qemu-system-x86_64 -machine
accel=tcg -m 1000000
(gdb) bt
#0 tcg_out_opc (opc=opc@entry=85, r=r@entry=0, rm=<optimized out>, x=x@entry=0,
s=<optimized out>) at ./tcg/i386/tcg-target.inc.c:460
#1 0x0000555555829ed4 in tcg_out_push (reg=<optimized out>, s=0x5555561c6440
<tcg_ctx>)
at ./tcg/i386/tcg-target.inc.c:703
#2 tcg_target_qemu_prologue (s=0x5555561c6440 <tcg_ctx>) at
./tcg/i386/tcg-target.inc.c:2343
#3 tcg_prologue_init (s=s@entry=0x5555561c6440 <tcg_ctx>) at ./tcg/tcg.c:394
#4 0x000055555582052e in tcg_exec_init (tb_size=<optimized out>) at
./translate-all.c:831
#5 0x0000555555945c35 in tcg_init (ms=<optimized out>) at ./accel.c:42
#6 0x0000555555945d6e in accel_init_machine (ms=0x5555566df080,
acc=0x5555566a82b0)
at ./accel.c:70
#7 configure_accelerator (ms=0x5555566df080) at ./accel.c:109
#8 0x000055555580fda9 in main (argc=<optimized out>, argv=<optimized out>,
envp=<optimized out>) at ./vl.c:4359
When host is not in load there is not problem, it works as expected.
root@libvirt-debian-9:/home/qemu# qemu-system-x86_64 -machine accel=tcg -m
1000000
qemu-system-x86_64: cannot set up guest memory 'pc.ram': Cannot allocate memory
I am using Debian 9.
In debian-testing this is already fixed, so qemu version is the problem
here. I didn't bisect the commit that fixed it, if anyone is interesting
in backporting I can do that.
Thanks,
Katerina
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