lkml.org 
[lkml]   [2005]   [Apr]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 3/3] Page Fault Scalability V20: Avoid lock for anonymous write fault
On Fri, 29 Apr 2005, Christoph Hellwig wrote:

> On Fri, Apr 29, 2005 at 12:59:17PM -0700, Christoph Lameter wrote:
> > Do not use the page_table_lock in do_anonymous_page. This will significantly
> > increase the parallelism in the page fault handler for SMP systems. The patch
> > also modifies the definitions of _mm_counter functions so that rss and anon_rss
> > become atomic (and will use atomic64_t if available).
>
> I thought we said all architectures should provide an atomic64_t (and
> given that it's not actually 64bit on 32bit architecture we should
> probably rename it to atomic_long_t)

Yes the way atomic types are provided may need a revision.
First of all we need atomic types that are size bound

atomic8_t
atomic16_t
atomic32_t

and (if available)

atomic64_t

and then some aliases

atomic_t -> atomic type for int
atomic_long_t -> atomic type for long

If these types are available then this patch could be cleaned up to
just use atomic_long_t.
-
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: 2005-04-30 01:11    [W:0.036 / U:0.672 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site