Re: Witness warning with SCTP
- From: "Attilio Rao" <attilio@xxxxxxxxxxx>
- Date: Thu, 11 Jan 2007 16:44:51 +0100
2007/1/10, John Baldwin <jhb@xxxxxxxxxxx>:
On Wednesday 10 January 2007 10:03, Randall Stewart wrote:
> Robert/All:
>
> Ok, here is the deal... I have looked in a bit
> closer at this..
>
> Here is what is happening...
>
> When a cookie arrives, we get a "create lock" on
> the socket this prevents the user on the same
> socket from creating a assoc at the same exact time.
Can't you do a model like this:
lock();
if (need to create pcb) {
unlock();
create_pcb(); // can sleep w/o holding lock
lock();
if (someone else created the pcb)
free(pcb_I_just_created);
}
unlock();
But it is quite impossible to get rid of M_WAITOK in this case (IIUC,
this should be the sleeping point)?
Attilio
--
Peace can only be achieved by understanding - A. Einstein
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