with udev-154 installed I could only start 1 domU, udevd would then crash. udev-151 works fine Reproducible: Always Steps to Reproduce: 1. install xen-4 and all requisites 2. make sure udev-154 is installed 3. start more than 1 domU Actual Results: udev 154 doesn't like the xen-backend.rules: KERNEL=="evtchn", NAME="xen/%k" KERNEL=="blktap[0-9]*", NAME="xen/%k" it also throws a kernel NULL pointer dereference Oops that appears to be from the vif event related to the domU that's starting Expected Results: normal operations first domU startup log: http://www.enlj.com/first_domU.txt second domU startup log: http://www.enlj.com/second_domU.txt emerge --info from the WORKING udev151 and xen-tools-4.0.0 (should be no different than udev-154) Portage 2.1.8.3 (default/linux/amd64/10.0, gcc-4.4.3, glibc-2.11.1-r0, 2.6.32-xen-r1 x86_64) ================================================================= System Settings ================================================================= System uname: Linux-2.6.32-xen-r1-x86_64-Intel-R-_Core-TM-2_Quad_CPU_Q6600_@_2.40GHz-with-gentoo-2.0.1 Timestamp of tree: Fri, 14 May 2010 14:15:02 +0000 app-shells/bash: 4.1_p5 dev-lang/python: 2.6.5-r2, 3.1.2-r3 sys-apps/baselayout: 2.0.1 sys-apps/openrc: 0.6.1-r1 sys-apps/sandbox: 2.2 sys-devel/autoconf: 2.65 sys-devel/automake: 1.11.1 sys-devel/binutils: 2.20.1-r1 sys-devel/gcc: 4.4.3-r2 sys-devel/gcc-config: 1.4.1 sys-devel/libtool: 2.2.6b virtual/os-headers: 2.6.33 ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-march=nocona -O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="assume-digests buildpkg distlocks fixpackages news parallel-fetch protect-owned sandbox sfperms strict unmerge-logs unmerge-orphans userfetch" GENTOO_MIRRORS="http://lug.mtu.edu/gentoo/ http://distro.ibiblio.org/pub/linux/distributions/gentoo/ http://www.gtlib.gatech.edu/pub/gentoo" LANG="en_US.UTF-8" LDFLAGS="-Wl,-O1" LINGUAS="en_US en" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.namerica.gentoo.org/gentoo-portage" USE="acpi amd64 bash-completion bzip2 cli cracklib dbus fam hal hvm iconv ithreads libnotify logrotate mmx multilib ncurses nls nptl nptlonly ntp pam pcf pcre perl pmu python readline session sse sse2 ssl ssse3 startup-notification svg tcpd unicode xvmc zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en_US en" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga neomagic nv r128 radeon savage sis tdfx trident vesa via vmware voodoo" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LC_ALL, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY ================================================================= Package Settings ================================================================= sys-fs/udev-151-r4 was built with the following: USE="(multilib) -devfs-compat -extras -old-hd-rules (-selinux) -test" app-emulation/xen-tools-4.0.0 was built with the following: USE="hvm ioemu (multilib) -acm -api -custom-cflags -debug -doc -flask -pygrub -screen" CFLAGS="-fno-strict-overflow" CXXFLAGS="-march=nocona -O2 -pipe -fno-strict-overflow" LDFLAGS=""
I can confirm this with xen-4.0.0/udev-154 on ~amd64. OOPS follows: BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 IP: [<ffffffff8040dc1b>] netback_uevent+0x2b/0xc0 PGD 39e77067 PUD 3d2a8067 PMD 0 Oops: 0000 [#2] SMP last sysfs file: /sys/devices/xen-backend/vif-2-0/uevent CPU 3 Modules linked in: Pid: 2993, comm: udevd Tainted: G D 2.6.32-xen-r1 #1 PowerEdge 1950 RIP: e030:[<ffffffff8040dc1b>] [<ffffffff8040dc1b>] netback_uevent+0x2b/0xc0 RSP: e02b:ffff880039d45e18 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88003c0a2400 RCX: 0000000000000000 RDX: 0000000000000037 RSI: ffff88003d30b000 RDI: 0000000000000000 RBP: ffff88003d30b000 R08: ffff880039d45db8 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: ffff88003d30b000 R13: fffffffffffffff4 R14: ffff880039f3a000 R15: ffff880039c640a0 FS: 00007f223e527700(0000) GS:ffff88000103c000(0000) knlGS:0000000000000000 CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 000000003b7ef000 CR4: 0000000000002660 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process udevd (pid: 2993, threadinfo ffff880039d44000, task ffff88003c37f1c0) Stack: ffff88003d30b000 ffff88003c0a2448 ffff88003d30b000 ffff88003d30b000 <0> fffffffffffffff4 ffffffff803de08a ffff88003b64e2d0 ffff88003f802060 <0> ffff88003c0a2458 ffff88003f802060 ffff88003c0a2458 ffffffff803de2a8 Call Trace: [<ffffffff803de08a>] ? dev_uevent+0x7a/0x160 [<ffffffff803de2a8>] ? show_uevent+0x98/0xf0 [<ffffffff803ddd8e>] ? dev_attr_show+0x1e/0x50 [<ffffffff8020e77a>] ? sysfs_get_active_two+0x1a/0x50 [<ffffffff8020cf0b>] ? sysfs_read_file+0xbb/0x1b0 [<ffffffff801b29c5>] ? vfs_read+0xb5/0x180 [<ffffffff801b2b7e>] ? sys_read+0x4e/0x90 [<ffffffff801099e8>] ? system_call_fastpath+0x16/0x1b [<ffffffff80109980>] ? system_call+0x0/0x52 Code: 48 83 ec 28 48 89 5c 24 08 48 89 6c 24 10 4c 89 64 24 18 4c 89 6c 24 20 48 89 fb 48 89 f5 48 8d 7f 48 e8 89 32 fd ff 31 c9 31 ff <4c> 8b 60 08 48 8b 73 08 48 c7 c2 a7 31 7a 80 e8 01 ce fe ff 49 RIP [<ffffffff8040dc1b>] netback_uevent+0x2b/0xc0 RSP <ffff880039d45e18> CR2: 0000000000000008 ---[ end trace 319b2d4d89039f34 ]---
I suppose I should include that this is on 2.6.32-xen-r1 dom0 kernel.
same here with xen 4.0 testing from hg with 2.6.33.3 pv ops kernel. any solutions for this? downgrading udev to what? Ben
(In reply to comment #3) > same here with xen 4.0 testing from hg with 2.6.33.3 pv ops kernel. any > solutions for this? downgrading udev to what? Downgrading to udev-149 worked for me with no noticeable side effects. I'll dig into the bug if I find some free time.
sys-fs/udev-151-r4 is the latest version of udev that has worked for me. the issue has persisted through to sys-kernel/xen-sources-2.6.34 and from outside reading it appears to be a bug in the kernel. here's the debian version of the bug: http://bugs.debian.org/583283 this appears to pertain only to the evtchn. I haven't seen any resolution of blktap issues that are basically the same.
Xen 4.1 in tree. Please test with it and reopen if it doesnt work
