| From 77583d0c191f2897c2a44cbbce0c4dec050fb3ae Mon Sep 17 00:00:00 2001 |
| From: Ingo Molnar <mingo@elte.hu> |
| Date: Fri, 3 Jul 2009 08:30:13 -0500 |
| Subject: [PATCH] mm-memory-rt |
| |
| commit 8a56ce758d645882ffbc920efd1d409c4ff83641 in tip. |
| |
| On RT this is not a critical code path. It's preemptible so we go for |
| the PREEMPT=n case as well. |
| |
| Signed-off-by: Ingo Molnar <mingo@elte.hu> |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| |
| diff --git a/mm/memory.c b/mm/memory.c |
| index 09e4b1b..3e88b30 100644 |
| --- a/mm/memory.c |
| +++ b/mm/memory.c |
| @@ -974,10 +974,13 @@ static unsigned long unmap_page_range(struct mmu_gather *tlb, |
| return addr; |
| } |
| |
| -#ifdef CONFIG_PREEMPT |
| +#if defined(CONFIG_PREEMPT) && !defined(CONFIG_PREEMPT_RT) |
| # define ZAP_BLOCK_SIZE (8 * PAGE_SIZE) |
| #else |
| -/* No preempt: go for improved straight-line efficiency */ |
| +/* |
| + * No preempt: go for improved straight-line efficiency |
| + * on PREEMPT_RT this is not a critical latency-path. |
| + */ |
| # define ZAP_BLOCK_SIZE (1024 * PAGE_SIZE) |
| #endif |
| |
| -- |
| 1.7.1.1 |
| |
