From: Andi Kleen <ak@suse.de>
To: "Aaron Durbin" <adurbin@google.com>,
patches@x86-64.org, linux-kernel@vger.kernel.org
Subject: [PATCH for 2.6.19] [1/9] x86_64: Fix partial page check to ensure unusable memory is not being marked usable.
Date: Tue, 14 Nov 2006 17:08:51 +0100 (CET) [thread overview]
Message-ID: <20061114508.445749000@suse.de> (raw)
From: "Aaron Durbin" <adurbin@google.com>
Fix partial page check in e820_register_active_regions to ensure
partial pages are
not being marked as active in the memory pool.
Signed-off-by: Aaron Durbin <adurbin@google.com>
Signed-off-by: Andi Kleen <ak@suse.de>
---
This was causing a machine to reboot w/ an area in the e820 that was less
than the page size because the upper address was being use to mark a hole as
active in the memory pool.
arch/x86_64/kernel/e820.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
Index: linux/arch/x86_64/kernel/e820.c
===================================================================
--- linux.orig/arch/x86_64/kernel/e820.c
+++ linux/arch/x86_64/kernel/e820.c
@@ -278,7 +278,7 @@ e820_register_active_regions(int nid, un
>> PAGE_SHIFT;
/* Skip map entries smaller than a page */
- if (ei_startpfn > ei_endpfn)
+ if (ei_startpfn >= ei_endpfn)
continue;
/* Check if end_pfn_map should be updated */
next reply other threads:[~2006-11-14 16:08 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-14 16:08 Andi Kleen [this message]
2006-11-14 16:08 ` [PATCH for 2.6.19] [2/9] x86_64: Fix PTRACE_[SG]ET_THREAD_AREA regression with ia32 emulation Andi Kleen
2006-11-14 16:08 ` [PATCH for 2.6.19] [3/9] x86_64: shorten the x86_64 boot setup GDT to what the comment says Andi Kleen
2006-11-15 10:00 ` Ingo Molnar
2006-11-14 16:08 ` [PATCH for 2.6.19] [4/9] x86_64: Handle reserve_bootmem_generic beyond end_pfn Andi Kleen
2006-11-14 16:08 ` [PATCH for 2.6.19] [5/9] x86_64: setup saved_max_pfn correctly (kdump) Andi Kleen
2006-11-14 16:08 ` [PATCH for 2.6.19] [6/9] x86_64: Update MMCONFIG resource insertion to check against e820 map Andi Kleen
2006-11-14 18:38 ` Andi Kleen
2006-11-14 18:47 ` Aaron Durbin
2006-11-14 18:58 ` Andi Kleen
2006-11-14 16:08 ` [PATCH for 2.6.19] [7/9] x86: Add acpi_user_timer_override option for Asus boards Andi Kleen
2006-11-14 16:08 ` [PATCH for 2.6.19] [8/9] x86_64: Fix vgetcpu when CONFIG_HOTPLUG_CPU is disabled Andi Kleen
2006-11-14 16:08 ` [PATCH for 2.6.19] [9/9] x86_64: Fix race in exit_idle Andi Kleen
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