Messages in this thread | | | From | Rusty Russell <> | Subject | Re: furwocks: Fast Userspace Read/Write Locks | Date | Fri, 08 Mar 2002 18:09:18 +1100 |
| |
In message <3C885A58.4040307@zytor.com> you write: > Okay, dumb question... > > What can this do that shared memory + existing semaphores can't do? > > -hpa
Ignoring speed issues and the fundamentally horrible interface of SysV semaphores, there are two main issues:
1) There's a limit on the number of SysV semaphores you can have. 2) Instead of one object to deal with (ie. a memory region), you now have two, with different lifetimes.
Hope that clarifies, Rusty. -- Anyone who quotes me in their sig is an idiot. -- Rusty Russell. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |