Hi all, Sending this out before I spend much time researching as maybe it's a known and fixed problem. When I send a signal (apparently even 0, to check whether the process is alive) from the host to a guest process, "something bad" happens. It looks like a spinlock isn't being released as all kinds of processes are getting stuck in uninterruptible sleep, loadavg shoots through the roof and the machine has to be power cycled (sysrq-b works but e.g. sysrq-s never finishes). There are no errors in dmesg (apart from usual "did lookup hidden devpts" spam). FWIW, lockdep is off. Best regards, Grzegorz Nosek --------------------------------------------------------------------- Versions: Kernel: 2.6.27.42-00007-gf591647 VS-API: 0x00020304 util-vserver: 0.30.213; May 9 2007, 20:02:07 Features: CC: gcc, gcc (GCC) 4.1.2 20061115 (prerelease) (Debian 4.1.1-21) CXX: g++, g++ (GCC) 4.1.2 20061115 (prerelease) (Debian 4.1.1-21) CPPFLAGS: '' CFLAGS: '-g -O2 -std=c99 -Wall -pedantic -W -funit-at-a-time' CXXFLAGS: '-g -O2 -ansi -Wall -pedantic -W -fmessage-length=0 -funit-at-a-time' build/host: i686-pc-linux-gnu/i686-pc-linux-gnu Use dietlibc: yes Build C++ programs: yes Build C99 programs: yes Available APIs: v13,net,v21 ext2fs Source: e2fsprogs syscall(2) invocation: alternative vserver(2) syscall#: 273/glibc Paths: prefix: /usr sysconf-Directory: /etc cfg-Directory: /etc/vservers initrd-Directory: $(sysconfdir)/init.d pkgstate-Directory: /var/run/vservers vserver-Rootdir: /vservers