From: Yinghai Lu <yinghai@kernel.org>
To: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Jesse Brandeburg <jesse.brandeburg@intel.com>
Cc: linux-kernel@vger.kernel.org, Yinghai Lu <yinghai@kernel.org>
Subject: [PATCH 5/5] x86: update nr_irqs according cpu num
Date: Fri, 08 Jan 2010 03:53:15 -0800 [thread overview]
Message-ID: <1262951595-1729-5-git-send-email-yinghai@kernel.org> (raw)
In-Reply-To: <1262951595-1729-1-git-send-email-yinghai@kernel.org>
that is max number on run time.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
arch/x86/kernel/apic/io_apic.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
Index: linux-2.6/arch/x86/kernel/apic/io_apic.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic/io_apic.c
+++ linux-2.6/arch/x86/kernel/apic/io_apic.c
@@ -3840,16 +3840,14 @@ int __init arch_probe_nr_irqs(void)
{
int nr;
- if (nr_irqs > (NR_VECTORS * nr_cpu_ids))
- nr_irqs = NR_VECTORS * nr_cpu_ids;
-
- nr = nr_irqs_gsi + 8 * nr_cpu_ids;
-#if defined(CONFIG_PCI_MSI) || defined(CONFIG_HT_IRQ)
- /*
- * for MSI and HT dyn irq
- */
- nr += nr_irqs_gsi * 64;
+ nr = NR_VECTORS - FIRST_DEVICE_VECTOR;
+#ifdef CONFIG_SMP
+ /* system vectors */
+ nr -= 0x10;
#endif
+ nr *= nr_cpu_ids;
+ nr += FIRST_DEVICE_VECTOR - IRQ0_VECTOR;
+
if (nr < nr_irqs)
nr_irqs = nr;
next prev parent reply other threads:[~2010-01-08 11:55 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-08 11:53 [PATCH 1/5] irq: remove not need bootmem code Yinghai Lu
2010-01-08 11:53 ` [PATCH 2/5] radix: move radix init early Yinghai Lu
2010-01-08 11:53 ` [PATCH 3/5] sparseirq: change irq_desc_ptrs to static Yinghai Lu
2010-01-08 11:53 ` [PATCH 4/5] sparseirq: use radix_tree instead of ptrs array Yinghai Lu
2010-01-08 12:14 ` Cyrill Gorcunov
2010-01-08 18:43 ` Eric W. Biederman
2010-01-08 11:53 ` Yinghai Lu [this message]
2010-01-08 19:11 ` [PATCH 5/5] x86: update nr_irqs according cpu num Eric W. Biederman
2010-01-08 19:21 ` H. Peter Anvin
2010-01-08 20:06 ` Yinghai Lu
2010-01-08 21:11 ` H. Peter Anvin
2010-01-08 20:10 ` Eric W. Biederman
2010-01-08 21:15 ` H. Peter Anvin
2010-01-08 19:49 ` Yinghai Lu
2010-01-08 20:20 ` Eric W. Biederman
2010-01-08 20:43 ` Yinghai Lu
2010-01-08 18:52 ` [PATCH 1/5] irq: remove not need bootmem code Eric W. Biederman
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