Emmanuel Dreyfus <m...@netbsd.org> wrote: > > xbd is not mpsafe, so it shouldn't be even race due to parallell > > processing on different CPUs. Maybe it would be useful to check if the > > problem still happens when you assign just single CPU to the DOMU. > > I get the crash with vcpu = 1 for the domU. I also tried to pin a single > cpu for the test domU, I still get it to crash:
I started tracing the code to see where the problem comes from. So far, I can tell that in vfs_bio.c, bread() -> bio_doread() will call VOP_STRATEGY once for the offendinf buf_t, but biodone() is called twice in interrupt context for the buf_t, leading to the biodone2 already panic later. Since you know the xbd code you could save me some time: where do we go below VOP_SRATEGY? -- Emmanuel Dreyfus http://hcpnet.free.fr/pubz m...@netbsd.org
