Re: [Dazuko-devel] 2.0.6 released

[John Ogness]

Sami Tikka wrote:
> P.S. A somewhat-related question: If I have a threaded application (and 
> I do) and one or more of the threads register with dazuko, does dazuko 
> intercept file accesses of threads belonging to the same process but 
> have not registered with dazuko? (I have been working with the 
> assumption that dazuko intercepts all threads, regardless of process, if 
> they have not been registered.)

For Linux, threads are implemented with different PID's. So yes, each thread 
is handled differently.

For FreeBSD 4, threads are implemented completely in userspace so the kernel 
does not see any difference between the various threads of a process. But 
Dazuko will not work as threaded in FreeBSD 4 anyway, because the userland 
threading implementation causes problems with Dazuko's kernel-blocking 
implementation.

For FreeBSD 5, threads are implemented at the kernel level. However, Dazuko 
does not distinguish between them. I consider this a bug and it should be 
fixed sometime in the future. (Now that I've updated my personal machine to 
FreeBSD 5, it will be easier to work on this.)

John Ogness

--
Dazuko Maintainer