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Bug#599496: linux-2.6: cannot kill process hung on syscall

Package: linux-2.6
Version: 2.6.32-22
Severity: normal

Recently, I've had a problem with tasks that apparently get hung on a
syscall.  For example:

  Oct  8 02:57:54 lakeview kernel: [84840.484280] INFO: task Xorg:4560 blocked for more than 120 seconds.

When this occurs, even "sudo kill -9 4560" does not work.  The kernel
should properly and immediately terminate processes receiving a SIGKILL
as root, even (especially) if that process is hung on a syscall.  The
inability to do this means that the machine becomes unusable when Xorg

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

brian m. carlson / brian with sandals: Houston, Texas, US
+1 832 623 2791 | http://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: RSA v4 4096b: 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187

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