| 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
| ||
|
Message-Id: <20060804131409.21401.58904.sendpatchset@localhost.localdomain>
Date: Fri, 4 Aug 2006 07:14:09 -0600
From: Keith Mannthey <kmannth@...ibm.com>
To: linux-kernel@...r.kernel.org
Cc: akpm@...l.org, discuss@...-64.org,
Keith Mannthey <kmannth@...ibm.com>, ak@...e.de,
lhms-devel@...ts.sourceforge.net, kamezawa.hiroyu@...fujitsu.com
Subject: [PATCH 4/10] hot-add-mem x86_64: Enable SPARSEMEM in srat.c
From: Keith Mannthey <kmannth@...ibm.com>
Enable x86_64 srat.c to share code between both reserve and sparsemem based add memory
paths. Both paths need the hot-add area node locality infomration (nodes_add). This
code refactors the code path to allow this.
Signed-off-by: Keith Mannthey<kmannth@...ibm.com>
---
srat.c | 51 +++++++++++++++++++++++++++++----------------------
1 files changed, 29 insertions(+), 22 deletions(-)
Files orig/arch/x86_64/mm/.srat.c.swp and current/arch/x86_64/mm/.srat.c.swp differ
diff -urN orig/arch/x86_64/mm/srat.c current/arch/x86_64/mm/srat.c
--- orig/arch/x86_64/mm/srat.c 2006-08-04 00:41:17.000000000 -0400
+++ current/arch/x86_64/mm/srat.c 2006-08-04 01:02:25.000000000 -0400
@@ -21,12 +21,6 @@
#include <asm/numa.h>
#include <asm/e820.h>
-#if (defined(CONFIG_ACPI_HOTPLUG_MEMORY) || \
- defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE)) \
- && !defined(CONFIG_MEMORY_HOTPLUG)
-#define RESERVE_HOTADD 1
-#endif
-
static struct acpi_table_slit *acpi_slit;
static nodemask_t nodes_parsed __initdata;
@@ -34,9 +28,6 @@
static struct bootnode nodes_add[MAX_NUMNODES] __initdata;
static int found_add_area __initdata;
int hotadd_percent __initdata = 0;
-#ifndef RESERVE_HOTADD
-#define hotadd_percent 0 /* Ignore all settings */
-#endif
/* Too small nodes confuse the VM badly. Usually they result
from BIOS bugs. */
@@ -157,7 +148,7 @@
pxm, pa->apic_id, node);
}
-#ifdef RESERVE_HOTADD
+#ifdef CONFIG_MEMORY_HOTPLUG_RESERVE
/*
* Protect against too large hotadd areas that would fill up memory.
*/
@@ -200,15 +191,37 @@
return 1;
}
+static int update_end_of_memory(unsigned long end)
+{
+ found_add_area = 1;
+ if ((end >> PAGE_SHIFT) > end_pfn)
+ end_pfn = end >> PAGE_SHIFT;
+ return 1;
+}
+
+static inline int save_add_info(void)
+{
+ return hotadd_percent > 0;
+}
+#else
+int update_end_of_memory(unsigned long end) {return 0;}
+static int hotadd_enough_memory(struct bootnode *nd) {return 1;}
+#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
+static inline int save_add_info(void) {return 1;}
+#else
+static inline int save_add_info(void) {return 0;}
+#endif
+#endif
/*
- * It is fine to add this area to the nodes data it will be used later
+ * Update nodes_add and decide if to include add are in the zone.
+ * Both SPARSE and RESERVE need nodes_add infomation.
* This code supports one contigious hot add area per node.
*/
static int reserve_hotadd(int node, unsigned long start, unsigned long end)
{
unsigned long s_pfn = start >> PAGE_SHIFT;
unsigned long e_pfn = end >> PAGE_SHIFT;
- int changed = 0;
+ int ret = 0, changed = 0;
struct bootnode *nd = &nodes_add[node];
/* I had some trouble with strange memory hotadd regions breaking
@@ -235,7 +248,6 @@
/* Looks good */
- found_add_area = 1;
if (nd->start == nd->end) {
nd->start = start;
nd->end = end;
@@ -253,14 +265,12 @@
printk(KERN_ERR "SRAT: Hotplug zone not continuous. Partly ignored\n");
}
- if ((nd->end >> PAGE_SHIFT) > end_pfn)
- end_pfn = nd->end >> PAGE_SHIFT;
+ ret = update_end_of_memory(nd->end);
if (changed)
printk(KERN_INFO "SRAT: hot plug zone found %Lx - %Lx\n", nd->start, nd->end);
- return 0;
+ return ret;
}
-#endif
/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
void __init
@@ -279,7 +289,7 @@
}
if (ma->flags.enabled == 0)
return;
- if (ma->flags.hot_pluggable && hotadd_percent == 0)
+ if (ma->flags.hot_pluggable && !save_add_info())
return;
start = ma->base_addr_lo | ((u64)ma->base_addr_hi << 32);
end = start + (ma->length_lo | ((u64)ma->length_hi << 32));
@@ -318,15 +328,13 @@
printk(KERN_INFO "SRAT: Node %u PXM %u %Lx-%Lx\n", node, pxm,
nd->start, nd->end);
-#ifdef RESERVE_HOTADD
- if (ma->flags.hot_pluggable && reserve_hotadd(node, start, end) < 0) {
+ if (ma->flags.hot_pluggable && !reserve_hotadd(node, start, end) < 0) {
/* Ignore hotadd region. Undo damage */
printk(KERN_NOTICE "SRAT: Hotplug region ignored\n");
*nd = oldnode;
if ((nd->start | nd->end) == 0)
node_clear(node, nodes_parsed);
}
-#endif
}
/* Sanity check to catch more bad SRATs (they are amazingly common).
@@ -342,7 +350,6 @@
unsigned long e = nodes[i].end >> PAGE_SHIFT;
pxmram += e - s;
pxmram -= e820_hole_size(s, e);
- pxmram -= nodes_add[i].end - nodes_add[i].start;
if ((long)pxmram < 0)
pxmram = 0;
}
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists