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Re: A comment about changing kernels
From: |
Jonathan S. Shapiro |
Subject: |
Re: A comment about changing kernels |
Date: |
Mon, 31 Oct 2005 22:18:09 -0500 |
On Tue, 2005-11-01 at 00:53 +0100, Bernhard Kauer wrote:
> > It really was a bug, and it has nothing to do with the IPC path,
>
> That's correct, it was a bug in the interrupt handler.
>
>
> > The correct behavior was to save the segment selectors, and this adds
> > about 20 cycles to the path.
>
> I do not see a problem, if the IPC set the segment registers to default
> values. See it as output values of this syscall.
>
> Shortly spoken: a syscall can change every user register, an interrupt
> has to change none of them.
Yes. The problem is that this behavior was occurring on *interrupts*
too.
shap
- Re: A comment about changing kernels, (continued)
- Re: A comment about changing kernels, Jonathan S. Shapiro, 2005/10/29
- Re: A comment about changing kernels, Bernhard Kauer, 2005/10/29
- Re: A comment about changing kernels, Jonathan S. Shapiro, 2005/10/30
- Re: A comment about changing kernels, Bernhard Kauer, 2005/10/30
- Re: A comment about changing kernels, Jonathan S. Shapiro, 2005/10/31
- Re: A comment about changing kernels, Bernhard Kauer, 2005/10/31
- Re: A comment about changing kernels, Jonathan S. Shapiro, 2005/10/31
- Re: A comment about changing kernels, Espen Skoglund, 2005/10/31
- Re: A comment about changing kernels, Jonathan S. Shapiro, 2005/10/31
- Re: A comment about changing kernels, Bernhard Kauer, 2005/10/31
- Re: A comment about changing kernels,
Jonathan S. Shapiro <=
- Re: A comment about changing kernels, Neal H. Walfield, 2005/10/28
- Re: A comment about changing kernels, Bernhard Kauer, 2005/10/29
- Re: A comment about changing kernels, Matthieu Lemerre, 2005/10/29
- Re: A comment about changing kernels, Marcus Brinkmann, 2005/10/30
- Re: A comment about changing kernels, Jonathan S. Shapiro, 2005/10/30
- Re: A comment about changing kernels, Espen Skoglund, 2005/10/31
- Re: A comment about changing kernels, Bernhard Kauer, 2005/10/31
- Re: A comment about changing kernels, Neal H. Walfield, 2005/10/31
- Re: A comment about changing kernels, Jonathan S. Shapiro, 2005/10/31
- Re: A comment about changing kernels, Bernhard Kauer, 2005/10/31