netdev - [net-next-2.6 PATCH 1/3] irq: Export irq_set

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 20 Oct 2009 19:26:53 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	davem@...emloft.net
Cc:	gospo@...hat.com, netdev@...r.kernel.org,
	Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next-2.6 PATCH 1/3] irq: Export irq_set_affinity() for drivers

From: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>

This patch allows drivers to specify an IRQ affinity mask for
their respective interrupt sources.  This is very useful on
network adapters using MSI-X, where aligning network flows
linearly to CPUs greatly improves efficiency of the network
stack.

Today, users must either hand-set affinity through /proc, or
use a script through the same interface.  This patch will allow
a driver to come completely pre-canned with an optimal
configuration.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---

 kernel/irq/manage.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index bde4c66..185eb26 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -137,6 +137,7 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask)
 	spin_unlock_irqrestore(&desc->lock, flags);
 	return 0;
 }
+EXPORT_SYMBOL(irq_set_affinity);
 
 #ifndef CONFIG_AUTO_IRQ_AFFINITY
 /*

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html