linux-kernel - Re: Early boot panic on machine with lots of memory

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Message-ID: <20120621201935.GC4642@google.com>
Date:	Thu, 21 Jun 2012 13:19:35 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Gavin Shan <shangw@...ux.vnet.ibm.com>
Cc:	Sasha Levin <levinsasha928@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>, hpa@...ux.intel.com,
	linux-mm <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Early boot panic on machine with lots of memory

Hello,

Sasha, can you please apply the following patch and verify that the
issue is gone?

Thanks.

diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index d23415c..4aa5e5d 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -111,9 +111,6 @@ unsigned long __init free_low_memory_core_early(int nodeid)
 	phys_addr_t start, end;
 	u64 i;
 
-	/* free reserved array temporarily so that it's treated as free area */
-	memblock_free_reserved_regions();
-
 	for_each_free_mem_range(i, MAX_NUMNODES, &start, &end, NULL) {
 		unsigned long start_pfn = PFN_UP(start);
 		unsigned long end_pfn = min_t(unsigned long,
@@ -124,8 +121,6 @@ unsigned long __init free_low_memory_core_early(int nodeid)
 		}
 	}
 
-	/* put region array back? */
-	memblock_reserve_reserved_regions();
 	return count;
 }
 
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