Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

* Michael K. Edwards <[email protected]> wrote:

> On 2/22/07, Alan <[email protected]> wrote:

> > We don't use the FPU in the kernel except in very weird cases where 
> > it makes an enormous performance difference. The threadlets also 
> > have the same page tables so they have the same %cr3 so its very 
> > cheap to switch, basically a predicted jump and some register loads
> 
> Do you not understand that real user code touches FPU state at 
> unpredictable (to the kernel) junctures?  Maybe not in a database or a 
> web server, but in the GUIs and web-based monitoring applications that 
> are 99% of the potential customers for kernel AIO?
> I have no idea what a %cr3 is, [...]

then please stop wasting Alan's time ...

	Ingo
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References:
- [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
  - From: Ingo Molnar <[email protected]>
- Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
  - From: "Michael K. Edwards" <[email protected]>
- Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
  - From: Ingo Molnar <[email protected]>
- Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
  - From: Ulrich Drepper <[email protected]>
- Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
  - From: Ingo Molnar <[email protected]>
- Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
  - From: Evgeniy Polyakov <[email protected]>
- Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
  - From: Ingo Molnar <[email protected]>
- Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
  - From: "Michael K. Edwards" <[email protected]>
- Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
  - From: Alan <[email protected]>
- Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
  - From: "Michael K. Edwards" <[email protected]>

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