Re: pthread in kernel modules?

[Chris Wright <chris@wirex.com>]

* Kashif Shaikh (kshaikh@consensys.com) wrote:
> 
> Isn't it true that both kernel_thread and pthread_create call the clone
> system call? That's the heritage I believe they share...

historically yes, current 2.5 no.

> Of course, I've never really understood why kernel_thread() would call a
> system call from kernel space...

well, see the code in 2.5.  it has changed. ;-)

from the changelog:

'Do x86 "kernel_thread()" explicitly by hand, instead of using a system
call from kernel space.

This avoids one level of hidden code, and makes what happens
much more explicit (and speeds it up too, fwiw)'  

-chris
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