From: Keith Owens <kaos@sgi.com>
To: linux-ia64@vger.kernel.org
Subject: Re: RFC - freeing up ar.k5
Date: Thu, 16 Sep 2004 22:59:03 +0000 [thread overview]
Message-ID: <19581.1095375543@ocs3.ocs.com.au> (raw)
In-Reply-To: <200409162152.i8GLqwG01566@unix-os.sc.intel.com>
On Thu, 16 Sep 2004 14:52:58 -0700,
"Luck, Tony" <tony.luck@intel.com> wrote:
>Well, this is what a patch to free up ar.k5 by replacing its use
>with a percpu variable looks like.
And a micro-optimization to add to it.
Index: linux/arch/ia64/kernel/ptrace.c
=================================--- linux.orig/arch/ia64/kernel/ptrace.c Sat Aug 14 15:38:08 2004
+++ linux/arch/ia64/kernel/ptrace.c Fri Sep 17 08:53:12 2004
@@ -613,7 +613,7 @@ ia64_flush_fph (struct task_struct *task
{
struct ia64_psr *psr = ia64_psr(ia64_task_regs(task));
- if (ia64_is_local_fpu_owner(task) && psr->mfh) {
+ if (psr->mfh && ia64_is_local_fpu_owner(task)) {
psr->mfh = 0;
task->thread.flags |= IA64_THREAD_FPH_VALID;
ia64_save_fpu(&task->thread.fph[0]);
next prev parent reply other threads:[~2004-09-16 22:59 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-16 21:52 RFC - freeing up ar.k5 Luck, Tony
2004-09-16 22:59 ` Keith Owens [this message]
2004-09-17 19:43 ` Russ Anderson
2004-09-17 20:48 ` Luck, Tony
2004-09-21 5:10 ` Luck, Tony
2004-10-01 21:35 ` Russ Anderson
2004-10-01 22:46 ` Luck, Tony
2004-10-04 0:06 ` Russ Anderson
2004-10-05 19:20 ` Russ Anderson
2004-10-05 19:27 ` Luck, Tony
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