From: Jack Steiner <steiner@sgi.com>
To: akpm@osdl.org, linux-kernel@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Subject: [PATCH] - Move cpu_vm_mask to be closer to mmu_context_t in struct mm
Date: Thu, 29 Jan 2004 16:14:44 -0600 [thread overview]
Message-ID: <20040129221444.GA11032@sgi.com> (raw)
The cpu_vm_mask use to be close to the mmu_context_t field
in the mm struct. Recently some large members were
added between "cpu_vm_mask" and "context". I suspect that
was an oversight.
Here is a patch that puts the fields close together. This
makes it likely that both fields are in the same cache line.
Since both fields are likely to be updated at the same
time, this may improve performance.
--- linux.base/./include/linux/sched.h Mon Jan 26 17:06:13 2004
+++ linux/./include/linux/sched.h Thu Jan 29 13:28:15 2004
@@ -206,7 +206,6 @@
unsigned long arg_start, arg_end, env_start, env_end;
unsigned long rss, total_vm, locked_vm;
unsigned long def_flags;
- cpumask_t cpu_vm_mask;
unsigned long saved_auxv[40]; /* for /proc/PID/auxv */
@@ -214,6 +213,8 @@
#ifdef CONFIG_HUGETLB_PAGE
int used_hugetlb;
#endif
+ cpumask_t cpu_vm_mask;
+
/* Architecture-specific MM context */
mm_context_t context;
--
Thanks
Jack Steiner (steiner@sgi.com) 651-683-5302
Principal Engineer SGI - Silicon Graphics, Inc.
reply other threads:[~2004-01-29 22:15 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20040129221444.GA11032@sgi.com \
--to=steiner@sgi.com \
--cc=akpm@osdl.org \
--cc=linux-ia64@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox