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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• 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]>

• Prev by Date: [PATCH] fix memory leak dma_declare_coherent_memory()
• Next by Date: Re: [PATCH] sata_nv: kill old private BMDMA helper functions
• Previous by thread: Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
• Next by thread: Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]