On Thu, Oct 25, 2012 at 06:12:06PM +0200, Avi Kivity wrote: > On 10/25/2012 04:39 PM, Aurelien Jarno wrote: > > On Thu, Oct 25, 2012 at 03:47:34PM +0200, Avi Kivity wrote: > >> On 10/24/2012 04:00 PM, Aurelien Jarno wrote: > >> > > >> > mips is also broken but by commit > >> > 1c380f9460522f32c8dd2577b2a53d518ec91c6d: > >> > > >> > | [ 0.436000] PCI: Enabling device 0000:00:0a.1 (0000 -> 0001) > >> > | Segmentation fault (core dumped) > >> > > >> > >> How do you reproduce it? > > > > You can use the mips kernel version 2.6.32 from: > > http://people.debian.org/~aurel32/qemu/mips/ > > > > Then just run it with the following command: > > qemu-system-mips -M malta -kernel vmlinux-2.6.32-5-4kc-malta -append > > "console=tty0" > > > > (You can also get the README command line if you don't care about > > downloading the disk image). > > Doesn't reproduce here with this command line (upstream + the bridge patch). > > [ 0.568000] PCI: Enabling device 0000:00:12.0 (0000 -> 0002) > [ 0.572000] cirrusfb 0000:00:12.0: Cirrus Logic chipset on PCI bus, > RAM (4096 kB) at 0x10000000 > > ... > > [ 1.172000] PCI: Enabling device 0000:00:0a.1 (0000 -> 0001) > [ 1.188000] scsi0 : ata_piix > > (with console=ttyS0)
Ok, looks like I didn't provide the right command line. I am only able to reproduce it when using -nographic, and only with -vga cirrus (yes it starts to be quite strange). In that case it's better to pass console=ttyS0, even if you can reproduce it with console=tty0. In short it seems heavily related to the cirrus VGA card. > What's lp - p when the segfault occurs? What's *index? lp - p = 0xa0 *index = 0x100a0 > | #3 0x00007f4e10f3477f in phys_page_set (leaf=<optimized out>, nb=16, > index=65696, d=0x7f4e124ffb50) at /home/aurel32/qemu/exec.c:458 > > We're setting 16 pages around address 269090816. Should be totally > straightforward. > > If you make memory_region_transaction_begin()/_commit() no-ops, we can > get a clearer stack trace. I'll try to get that. Thanks, Aurelien -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net
