| | Date | Tue, 13 Feb 2007 15:00:19 +0000 | | From | Alan <> | | Subject | Re: [patch 00/11] ANNOUNCE: "Syslets", generic asynchronous system call support |
| |
> A syslet is executed opportunistically: i.e. the syslet subsystem > assumes that the syslet will not block, and it will switch to a > cachemiss kernel thread from the scheduler. This means that even a
How is scheduler fairness maintained ? and what is done for resource accounting here ?
> that the kernel fills and user-space clears. Waiting is done via the > sys_async_wait() system call. Completion can be supressed on a per-atom
They should be selectable as well iff possible.
> Open issues:
Let me add some more
sys_setuid/gid/etc need to be synchronous only and not occur while other async syscalls are running in parallel to meet current kernel assumptions.
sys_exec and other security boundaries must be synchronous only and not allow async "spill over" (consider setuid async binary patching)
> - sys_fork() and sys_async_exec() should be filtered out from the > syscalls that are allowed - first one only makes sense with ptregs,
clone and vfork. async_vfork is a real mindbender actually.
> second one is a nice kernel recursion thing :) I didnt want to > duplicate the sys_call_table though - maybe others have a better > idea.
What are the semantics of async sys_async_wait and async sys_async ?
- 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/
|