lkml.org 
[lkml]   [2006]   [Feb]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH ] VMSPLIT config options (with default config fixed)
Jan Engelhardt wrote:
>
> This sort of testing reminds me of Linus's 100->1000 Hz change
> ("I chose 1000 originally partly as a way to make sure that people that
> assumed HZ was 100 would get a swift kick in the pants.")
>
> Could we also do that with VMSPLIT?
> ("Let's choose VMSPLIT_2G to make sure that i386-people that assumed
> PAGE_OFFSET was 0xC0000000 would get...")

Mmm.. bad idea. As much as I'd like the default to be 3GB_OPT, that would
be a big impact to userspace, and there's no point in breaking everyone's
machines when advanced users can just reconfig/recompile to get what they want.

>> Hm, I wonder if we could have a more fine-grained choice of the
>> boundary? There are also systems around with e.g. 1.25G or 1.5G of
>> main memory.
>>
> Maybe something like:
> config VMSPLIT_1G
> bool "1G/3G user/kernel split"
> config VMSPLIT_X
> bool "Manual split"
> endchoice
...

Yes, that looks like a good idea.

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

\
 
 \ /
  Last update: 2006-02-03 23:43    [from the cache]
©2003-2011 Jasper Spaans