Ostra is a KernelDevelopment tool created by ArnaldoMelo to track objects in the LinuxKernel.
It was originally created for use in debugging DCCP but has also examples for TCP and can be used for many other purposes.
The source code is in Git format at 
http://www.kernel.org/git/?p=linux/kernel/git/acme/ostra.git;a=summary
Ostra requires Sparse to be installed.
At the moment (25 Aug 05) Ostra won't compile against Sparse without a patch that LinusTorvalds has not yet commited. ArnaldoMelo has supplied a patch and you can contact him or IanMcDonald for it.
2 pages link to Ostra:
lib/main.php:944: Notice: PageInfo: Cannot find action page
lib/main.php:839: Notice: PageInfo: Unknown action
