linux-kernel - Re: [PATCH 1/4] make dev_to

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Message-id: <200802201241.52638.yinghai.lu@sun.com>
Date:	Wed, 20 Feb 2008 12:41:52 -0800
From:	Yinghai Lu <Yinghai.Lu@....COM>
To:	Greg KH <greg@...ah.com>, Ingo Molnar <mingo@...e.hu>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] make dev_to_node return online node

please use this one instead. this one is less intrusive, and pcibus_to_node will work too
and don't need other changes.

YH

---

[PATCH] make dev_to_node return online node v2

some numa system ( with multi HT chains) may return node without ram. aka it
is not online.
try to get one online node, otherwise return -1

Signed-off-by: Yinghai Lu <yinghai.lu@....com>

diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index c163ad1..2c1a651 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -213,6 +213,9 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do
 		set_mp_bus_to_node(busnum, node);
 	else
 		node = get_mp_bus_to_node(busnum);
+
+	if (node != -1 && !node_online(node))
+		node = -1;
 #endif
 
 	/* Allocate per-root-bus (not per bus) arch-specific data.
--
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