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Re: emulating no-senders notifications in L4?
From: |
Yoshinori K. Okuji |
Subject: |
Re: emulating no-senders notifications in L4? |
Date: |
Thu, 20 Dec 2001 21:48:29 +0900 |
User-agent: |
Wanderlust/2.6.0 (Twist And Shout) SEMI/1.14.3 (Ushinoya) FLIM/1.14.3 (Unebigoryoae) APEL/10.3 Emacs/20.7 (i686-pc-linux-gnu) MULE/4.0 (HANANOEN) |
At 20 Dec 2001 00:37:34 +0100,
Niels Möller wrote:
> Can the scheme above be improved (without adding security features
> like port-rigts to the kernel)?
If most RPCs are normal messages from a task having a send right to
one having a receive right, it might improve the performance to map
the arrays to every task in read-only mode, so that it can check if an
IPC is valid by itself. In this case, a sending thread does an IPC to a
receiving thread directly somehow, so this makes the context switches
half. This isn't good for "send once" rights, but I don't think "send
once" rights are used so often.
However, I'm not sure if L4-Hurd needs a central port right server. Is
it really necessary?
Okuji
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- Re: emulating no-senders notifications in L4?, Niels Möller, 2001/12/19
- Re: emulating no-senders notifications in L4?, Marcus Brinkmann, 2001/12/19
- Re: emulating no-senders notifications in L4?,
Yoshinori K. Okuji <=
- Re: emulating no-senders notifications in L4?, Niels Möller, 2001/12/20
- Re: emulating no-senders notifications in L4?, Jean Wolter, 2001/12/20
- Re: emulating no-senders notifications in L4?, Niels Möller, 2001/12/20
- Re: emulating no-senders notifications in L4?, Marcus Brinkmann, 2001/12/20
- Re: emulating no-senders notifications in L4?, Jean Wolter, 2001/12/20
- Re: emulating no-senders notifications in L4?, Niels Möller, 2001/12/20
- Re: emulating no-senders notifications in L4?, Marcus Brinkmann, 2001/12/20
- Re: emulating no-senders notifications in L4?, Roland McGrath, 2001/12/20
- Re: emulating no-senders notifications in L4?, Thomas Bushnell, BSG, 2001/12/20
- Re: emulating no-senders notifications in L4?, Thomas Bushnell, BSG, 2001/12/20