On 31 October 2014 03:46, Wangkai (Kevin,C) <wangka...@huawei.com> wrote: > Hi all, > I am using qemu-system-arm emulate armv7 with 2 cpus on x86_64 host, when I > do the command tar -xf xxx.tar or rm -r xxx, after a while, > Guest system hang up on file system: > > When mmc request a block, that cannot receive a request done event, it seems > request done irq loss. > After I change the cpu to single core, the problem was solved. > > Is there some problem on qemu multi-core emulation?
I forget if we have fixed any bugs on the 32 bit SMP emulation recently. I suggest trying a current QEMU master build, though, to see if your problem has been fixed. Note that emulating more than one guest core is always going to be slower than a "-smp 1" configuration if you're not using KVM, though, so often it's better to just use -smp 1 anyway. -- PMM
