On Thu, 23 Feb 2006, Linus Torvalds wrote:
>
>
> On Thu, 23 Feb 2006, Arjan van de Ven wrote:
>>>
>>> I think you would first need to move the code first for that. Currently it starts
>>> at 1MB, which means 1MB is already wasted of the aligned 2MB TLB entry.
>>>
>>> I wouldn't have a problem with moving the 64bit kernel to 2MB though.
>>
>> that was easy since it's a Config entry already ;)
>
> Btw, the "low TLB entry" for the direct-mapped case can't be used as a
> hugetlb page anyway, due to the MMU splitting it up due to the special
> MTRR regions, if I recall correctly.
>
> So this is probably a bigger performance win than just the difference
> between using one or two TLB entries.
>
> The same should be true on x86, btw. Where we should use a physical start
> address of 4MB for best performance.
>
> Does anybody want to run benchmarks? (Totally untested, may not boot,
> might physically accost your pets for all I know).
>
> Linus
I just reconfigured and rebuilt linux-2.6.15.4 to put PHYSICAL_START
at 0x00400000, unconditionally and it booted fine and is working so
a 'boot' shouldn't be a problem.
Cheers,
Dick Johnson
Penguin : Linux version 2.6.15.4 on an i686 machine (5589.54 BogoMips).
Warning : 98.36% of all statistics are fiction.
_
****************************************************************
The information transmitted in this message is confidential and may be privileged. Any review, retransmission, dissemination, or other use of this information by persons or entities other than the intended recipient is prohibited. If you are not the intended recipient, please notify Analogic Corporation immediately - by replying to this message or by sending an email to [email protected] - and destroy all copies of this information, including any attachments, without reading or disclosing them.
Thank you.
-
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/
[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]
