On Tue, Jan 24, 2017 at 05:45:25PM +0300, Alexander Nusov wrote: > Yes, it was FreeBSD 11.0-STABLE Dom0 with xen-kernel/xen-tools built from the > ports tree (head) > > > > It seems there is an issue with xen pci devices, since booting from QCOW2 > images actually works (even on FreeBSD 11.0-RELEASE branch) except > communication with /xen/vbd devices from the guest.
Yes, I'm seeing exactly the same. The QEMU process is killed with a segmentation fault. Akshay, here is the full debug output: Program terminated with signal 11, Segmentation fault. [...] #0 blk_handle_requests (blkdev=0x807463c00) at hw/block/xen_disk.c:862 862 rp = blkdev->rings.common.sring->req_prod; [New Thread 8087f9000 (LWP 100947/<unknown>)] [New Thread 807418800 (LWP 100945/<unknown>)] [New Thread 807418300 (LWP 100944/<unknown>)] [New Thread 807417e00 (LWP 100943/<unknown>)] [New Thread 807417900 (LWP 100942/<unknown>)] [New Thread 807417400 (LWP 100941/<unknown>)] [New Thread 807416a00 (LWP 100940/<unknown>)] [New Thread 807416500 (LWP 100939/<unknown>)] [New Thread 807416000 (LWP 100091/<unknown>)] (gdb) bt #0 blk_handle_requests (blkdev=0x807463c00) at hw/block/xen_disk.c:862 #1 0x00000000005f9dcd in blk_bh (opaque=0x807463c00) at hw/block/xen_disk.c:918 #2 0x000000000080ba69 in aio_bh_call (bh=0x80780d810) at async.c:87 #3 0x000000000080bb10 in aio_bh_poll (ctx=0x8074a0680) at async.c:115 #4 0x000000000081c099 in aio_dispatch (ctx=0x8074a0680) at aio-posix.c:303 #5 0x000000000080c2cd in aio_ctx_dispatch (source=0x8074a0680, callback=0, user_data=0x0) at async.c:254 #6 0x0000000802e3903b in g_main_context_dispatch () from /usr/local/lib/libglib-2.0.so.0 #7 0x000000000081a34c in glib_pollfds_poll () at main-loop.c:259 #8 0x0000000000819dc5 in os_host_main_loop_wait (timeout=0) at main-loop.c:306 #9 0x0000000000819c29 in main_loop_wait (nonblocking=0) at main-loop.c:556 #10 0x0000000000588ed7 in main_loop () at vl.c:1966 #11 0x0000000000583b59 in main (argc=38, argv=0x7fffffffe750, envp=0x7fffffffe888) at vl.c:4684 Current language: auto; currently minimal It seems like the device is not properly mapping the grants, and QEMU gets a SEGFAULT when trying to access the ring page. Roger. _______________________________________________ email@example.com mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"