lkml.org 
[lkml]   [2003]   [Nov]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: hash table sizes

> That was a concern to me too. However, on IA64, all page structs are
> in the vmalloc region (it isnt allocated by vmalloc but is in the same
> region as vmalloc'ed pages. They are mapped with 16k pages instead of
> the 64MB pages used for memory allocated by kmalloc).
>
> Before switching to 16K pages for the page structs, we made numerous
> performance measurements. As far as we could tell, there was no
> performce degradation caused by the smaller pages. It seems to me that
> if page structs are ok being mapped by 16k pages, the hash tables
> would be ok too.

OK, on ppc64 with a 4kB base pagesize Id be more worried about using the
vmalloc region.

Anton
-
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: 2005-03-22 13:58    [W:0.095 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site