On Wed, Mar 3, 2010 at 12:06 AM, Khaled Ibrahim <kzm98@xxxxxxxxxxx> wrote: > > Hi Cam, > > I used your patches successfully to support shared memory on KVM and > used the test cases successfully, but qemu-kvm crashes when I increased the > size of the shared memory. I > applied the ivshmem patch to qemu-kvm-0.12.3 (some manual patching was > needed). It worked flawlessly for > up to 128MB of shared memory on my system. I am running on a machine with 64GB > memory running opensuse (kernel 2.6.27) on AMD opteron. > > Qemu crashes with > smp=4 and the shared memory requested in 256MB, (512MB with smp=1), even though > the shared memory file is created. I debugged the problem and it seems that > some memory corruptions happens. Can you please provide the full command-line for the smp=1 instance? > > It crashes in the subpage_register for rtl8139 pci driver!, > tracked back to rtl8139_mmio_map. The problem starts with corrupted value in > the config field in the struct for the rtl8139 driver. At offset 20 of this > field the address should indicate that the address is uninitialized at that > time of crash, but surprisingly the value changes over the course of execution > and gets the SIZE of the shared memory allocated (related to ivshmem). I failed > to identify what changes/corrupts that field. I tried some padding for > allocation but the field always gets updated with the size of the shared memory > in a very consistent way. > As far as you know does anything in the guest trigger the corruption? Does the corruption happen immediately or after running some of the test programs? Thanks, Cam -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
