Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

[Evgeniy Polyakov]

On Thu, Mar 01, 2007 at 02:33:01AM +0100, Andrea Arcangeli (andrea@xxxxxxx) wrote:
> On Thu, Mar 01, 2007 at 12:12:28AM +0100, Ingo Molnar wrote:
> > more capable by providing more special system calls like sys_upcall() to 
> > execute a user-space function. (that way a syslet could still execute 
> > user-space code without having to exit out of kernel mode too 
> > frequently) Or perhaps a sys_x86_bytecode() call, that would execute a 
> > pre-verified, kernel-stored sequence of simplified x86 bytecode, using 
> > the kernel stack.
> 
> Which means the userspace code would then run with kernel privilege
> level somehow (after security verifier, whatever). You remember I
> think it's a plain crazy idea...

Syslets/threadlets do not execute userspace code in kernel - they behave
similar to threads. sys_upcall() would be a wrapper for quite complex
threadlet machinery.

-- 
	Evgeniy Polyakov
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/