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From: Michael Ellerman <michael@ellerman.id.au>
To: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: linuxppc-dev@ozlabs.org, LKML <linux-kernel@vger.kernel.org>,
	Paul Mackerras <paulus@samba.org>
Subject: Re: [PATCH] Fake NUMA emulation for PowerPC (Take 2)
Date: Fri, 18 Jan 2008 16:44:58 +1100	[thread overview]
Message-ID: <1200635099.7806.3.camel@concordia.ozlabs.ibm.com> (raw)
In-Reply-To: <1200634493.7806.0.camel@concordia.ozlabs.ibm.com>

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On Fri, 2008-01-18 at 16:34 +1100, Michael Ellerman wrote:
> On Sat, 2007-12-08 at 04:07 +0530, Balbir Singh wrote:
> > Changelog
> > 
> > 1. Get rid of the constant 5 (based on comments from
> >                                 Geert.Uytterhoeven@sonycom.com)
> > 2. Implement suggestions from Olof Johannson
> > 3. Check if cmdline is NULL in fake_numa_create_new_node()
> > 
> > Tested with additional parameters from Olof
> > 
> > numa=debug,fake=
> > numa=foo,fake=bar
> 
> 
> I'm not sure why yet, but git bisect tells me it's this patch that's
> causing the for-2.6.25 tree to explode on boot on cell machines.

This fixes it, although I'm a little worried about some of the
removals/movings of node_set_online() in the patch.


diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 1666e7d..dcedc26 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -49,7 +49,6 @@ static int __cpuinit fake_numa_create_new_node(unsigned long end_pfn,
 	static unsigned int fake_nid = 0;
 	static unsigned long long curr_boundary = 0;
 
-	*nid = fake_nid;
 	if (!p)
 		return 0;
 
@@ -60,6 +59,7 @@ static int __cpuinit fake_numa_create_new_node(unsigned long end_pfn,
 	if (mem < curr_boundary)
 		return 0;
 
+	*nid = fake_nid;
 	curr_boundary = mem;
 
 	if ((end_pfn << PAGE_SHIFT) > mem) {


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  parent reply	other threads:[~2008-01-18  5:45 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-07 22:37 Balbir Singh
2007-12-10 19:36 ` Balbir Singh
2007-12-10 23:07 ` Olof Johansson
2008-01-18  5:34 ` Michael Ellerman
2008-01-18  5:41   ` Balbir Singh
2008-01-18  5:44   ` Michael Ellerman [this message]
2008-01-18  7:08     ` Balbir Singh
2008-01-26  7:13     ` Balbir Singh
2008-01-27 11:55       ` Paul Mackerras
2008-01-27 15:01         ` Balbir Singh
2008-01-27 20:22           ` Nish Aravamudan
2008-01-28  9:41             ` Balbir Singh
2008-01-28 12:52         ` [PATCH powerpc] Fake NUMA emulation for PowerPC (Take 3) Balbir Singh
2008-01-29 13:04           ` Michael Ellerman
2008-01-29 13:50             ` Balbir Singh
2008-02-01  4:57             ` [PATCH powerpc] Fake NUMA emulation for PowerPC (Take 4) Balbir Singh
2008-01-18  5:55 ` [PATCH] Fake NUMA emulation for PowerPC (Take 2) Michael Ellerman
2008-01-18  6:51   ` Balbir Singh

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