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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] The patch cleans up (ugly) setup.c that I wanted to fix for a long time
# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 737433c5bb2e7742931ec28fbfa57d3cc1e90d28
# Parent 60a8a5ca4291c75f64090311812ffb9fde7daea7
The patch cleans up (ugly) setup.c that I wanted to fix for a long time
(but did not have time for that).
It should be compiled for the native x86_64 Linux as well (but not
tested yet, so I don't guarantee):
- no #if 0 or comment out
- use CONFIG_XEN for xen specific code
- preparation for merge to the upstream
- tested both dom0 (UP and SMP) and domU
Signed-off-by: Jun Nakajima <jun.nakajima@xxxxxxxxx>
diff -r 60a8a5ca4291 -r 737433c5bb2e
linux-2.6-xen-sparse/arch/xen/x86_64/kernel/e820.c
--- a/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/e820.c Mon Aug 15
07:51:58 2005
+++ b/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/e820.c Mon Aug 15
07:52:19 2005
@@ -46,7 +46,7 @@
e820.nr_map++;
}
-#if 0
+#ifndef CONFIG_XEN
extern char _end[];
/*
@@ -235,7 +235,6 @@
}
}
-
void __init e820_print_map(char *who)
{
int i;
@@ -516,9 +515,31 @@
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
e820_print_map(who);
}
+
+#else /* CONFIX_XEN */
+extern unsigned long xen_override_max_pfn;
+extern union xen_start_info_union xen_start_info_union;
+/*
+ * Guest physical starts from 0.
+ */
+unsigned long __init e820_end_of_ram(void)
+{
+ unsigned long max_end_pfn = xen_start_info.nr_pages;
+
+ if ( xen_override_max_pfn < max_end_pfn)
+ xen_override_max_pfn = max_end_pfn;
+
+ return xen_override_max_pfn;
+}
+
+
+
+void __init e820_reserve_resources(void)
+{
+ return; /* Xen won't have reserved entries */
+}
+
#endif
-
-extern unsigned long xen_override_max_pfn;
void __init parse_memopt(char *p, char **from)
{
diff -r 60a8a5ca4291 -r 737433c5bb2e
linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup.c
--- a/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup.c Mon Aug 15
07:51:58 2005
+++ b/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup.c Mon Aug 15
07:52:19 2005
@@ -40,7 +40,6 @@
#include <linux/acpi.h>
#include <linux/kallsyms.h>
#include <linux/edd.h>
-#include <linux/percpu.h>
#include <asm/mtrr.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@@ -58,27 +57,36 @@
#include <asm/setup.h>
#include <asm/mach_apic.h>
#include <asm/numa.h>
+#ifdef CONFIG_XEN
+#include <linux/percpu.h>
#include <asm-xen/xen-public/physdev.h>
#include "setup_arch_pre.h"
#include <asm-xen/hypervisor.h>
-
#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
#define PFN_PHYS(x) ((x) << PAGE_SHIFT)
-
+#define end_pfn_map end_pfn
#include <asm/mach-xen/setup_arch_post.h>
extern unsigned long start_pfn;
-
-#if 0
-struct edid_info {
- unsigned char dummy[128];
-};
-#endif
-
extern struct edid_info edid_info;
+
+shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
+EXPORT_SYMBOL(HYPERVISOR_shared_info);
/* Allows setting of maximum possible memory size */
unsigned long xen_override_max_pfn;
+
+u32 *phys_to_machine_mapping, *pfn_to_mfn_frame_list;
+
+EXPORT_SYMBOL(phys_to_machine_mapping);
+
+DEFINE_PER_CPU(multicall_entry_t, multicall_list[8]);
+DEFINE_PER_CPU(int, nr_multicall_ents);
+
+/* Raw start-of-day parameters from the hypervisor. */
+union xen_start_info_union xen_start_info_union;
+#endif
+
/*
* Machine setup..
*/
@@ -166,7 +174,7 @@
#define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
-#ifdef CONFIG_XEN_PRIVILEGED_GUEST
+#if defined(CONFIG_XEN_PRIVILEGED_GUEST) || !defined(CONFIG_XEN)
static struct resource system_rom_resource = {
.name = "System ROM",
.start = 0xf0000,
@@ -200,7 +208,7 @@
#define ADAPTER_ROM_RESOURCES \
(sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
-#ifdef CONFIG_XEN_PRIVILEGED_GUEST
+#if defined(CONFIG_XEN_PRIVILEGED_GUEST) || !defined(CONFIG_XEN)
static struct resource video_rom_resource = {
.name = "Video ROM",
.start = 0xc0000,
@@ -216,7 +224,7 @@
.flags = IORESOURCE_RAM,
};
-#ifdef CONFIG_XEN_PRIVILEGED_GUEST
+#if defined(CONFIG_XEN_PRIVILEGED_GUEST) || !defined(CONFIG_XEN)
#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
static int __init romchecksum(unsigned char *rom, unsigned long length)
@@ -294,33 +302,24 @@
}
#endif
-/*
- * Point at the empty zero page to start with. We map the real shared_info
- * page as soon as fixmap is up and running.
- */
-shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
-EXPORT_SYMBOL(HYPERVISOR_shared_info);
-
-u32 *phys_to_machine_mapping, *pfn_to_mfn_frame_list;
-
-EXPORT_SYMBOL(phys_to_machine_mapping);
-
-DEFINE_PER_CPU(multicall_entry_t, multicall_list[8]);
-DEFINE_PER_CPU(int, nr_multicall_ents);
-
-/* Raw start-of-day parameters from the hypervisor. */
-union xen_start_info_union xen_start_info_union;
static __init void parse_cmdline_early (char ** cmdline_p)
{
char c = ' ', *to = command_line, *from = COMMAND_LINE;
- int len = 0, max_cmdline;
-
+ int len = 0;
+
+ /* Save unparsed command line copy for /proc/cmdline */
+#ifdef CONFIG_XEN
+ int max_cmdline;
+
if ((max_cmdline = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
max_cmdline = COMMAND_LINE_SIZE;
memcpy(saved_command_line, xen_start_info.cmd_line, max_cmdline);
- /* Save unparsed command line copy for /proc/cmdline */
saved_command_line[max_cmdline-1] = '\0';
+#else
+ memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
+ saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
+#endif
for (;;) {
if (c != ' ')
@@ -378,8 +377,7 @@
acpi_skip_timer_override = 1;
#endif
#endif
-
-#if 0
+#ifndef CONFIG_XEN
if (!memcmp(from, "nolapic", 7) ||
!memcmp(from, "disableapic", 11))
disable_apic = 1;
@@ -391,8 +389,7 @@
skip_ioapic_setup = 0;
ioapic_force = 1;
}
-#endif
-
+#endif
if (!memcmp(from, "mem=", 4))
parse_memopt(from+4, &from);
@@ -426,14 +423,10 @@
}
#ifndef CONFIG_DISCONTIGMEM
+#ifdef CONFIG_XEN
static void __init contig_initmem_init(void)
{
unsigned long bootmap_size, bootmap;
-
- /*
- * partially used pages are not usable - thus
- * we are rounding upwards:
- */
bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
bootmap = start_pfn;
@@ -441,19 +434,22 @@
reserve_bootmem(bootmap, bootmap_size);
free_bootmem(start_pfn << PAGE_SHIFT, (end_pfn - start_pfn) <<
PAGE_SHIFT);
- printk("Registering memory for bootmem: from %lx, size = %lx\n",
- start_pfn << PAGE_SHIFT, (end_pfn - start_pfn) <<
PAGE_SHIFT);
- /*
- * This should cover kernel_end
- */
-#if 0
- reserve_bootmem(HIGH_MEMORY, (PFN_PHYS(start_pfn) +
- bootmap_size + PAGE_SIZE-1) -
(HIGH_MEMORY));
-#endif
reserve_bootmem(0, (PFN_PHYS(start_pfn) +
bootmap_size + PAGE_SIZE-1));
-
+}
+#else
+static void __init contig_initmem_init(void)
+{
+ unsigned long bootmap_size, bootmap;
+ bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
+ bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
+ if (bootmap == -1L)
+ panic("Cannot find bootmem map of size %ld\n",bootmap_size);
+ bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
+ e820_bootmem_free(&contig_page_data, 0, end_pfn << PAGE_SHIFT);
+ reserve_bootmem(bootmap, bootmap_size);
}
+#endif /* !CONFIG_XEN */
#endif
/* Use inline assembly to define this because the nops are defined
@@ -545,35 +541,8 @@
}
#endif
-#if 0
-#define EBDA_ADDR_POINTER 0x40E
-static void __init reserve_ebda_region(void)
-{
- unsigned int addr;
- /**
- * there is a real-mode segmented pointer pointing to the
- * 4K EBDA area at 0x40E
- */
- addr = *(unsigned short *)phys_to_virt(EBDA_ADDR_POINTER);
- addr <<= 4;
- if (addr)
- reserve_bootmem_generic(addr, PAGE_SIZE);
-}
-#endif
-
-/*
- * Guest physical starts from 0.
- */
-
-unsigned long __init xen_end_of_ram(void)
-{
- unsigned long max_end_pfn = xen_start_info.nr_pages;
-
- if ( xen_override_max_pfn < max_end_pfn)
- xen_override_max_pfn = max_end_pfn;
-
- return xen_override_max_pfn;
-}
+#ifdef CONFIG_XEN
+#define reserve_ebda_region() void(0)
static void __init print_memory_map(char *who)
{
@@ -601,7 +570,6 @@
}
}
-#ifdef CONFIG_XEN
void __init smp_alloc_memory(void)
{
int cpu;
@@ -612,37 +580,35 @@
/* XXX free unused pages later */
}
}
+
+
+#else
+#define EBDA_ADDR_POINTER 0x40E
+static void __init reserve_ebda_region(void)
+{
+ unsigned int addr;
+ /**
+ * there is a real-mode segmented pointer pointing to the
+ * 4K EBDA area at 0x40E
+ */
+ addr = *(unsigned short *)phys_to_virt(EBDA_ADDR_POINTER);
+ addr <<= 4;
+ if (addr)
+ reserve_bootmem_generic(addr, PAGE_SIZE);
+}
#endif
void __init setup_arch(char **cmdline_p)
{
- int i, j;
- physdev_op_t op;
-
-#if 0
- ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
-#else
+ unsigned long kernel_end;
+
+#ifdef CONFIG_XEN
ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
-#endif
drive_info = DRIVE_INFO;
-
+ kernel_end = 0; /* dummy */
#ifdef CONFIG_XEN_PHYSDEV_ACCESS
screen_info = SCREEN_INFO;
-#endif
- edid_info = EDID_INFO;
- saved_video_mode = SAVED_VIDEO_MODE;
- bootloader_type = LOADER_TYPE;
-
-#ifdef CONFIG_BLK_DEV_RAM
- rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
- rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
- rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
-#endif
-
- HYPERVISOR_vm_assist(VMASST_CMD_enable,
- VMASST_TYPE_writable_pagetables);
-
-#ifdef CONFIG_XEN_PHYSDEV_ACCESS
+
/* This is drawn from a dump from vgacon:startup in standard Linux. */
screen_info.orig_video_mode = 3;
screen_info.orig_video_isVGA = 1;
@@ -650,27 +616,57 @@
screen_info.orig_video_cols = 80;
screen_info.orig_video_ega_bx = 3;
screen_info.orig_video_points = 16;
-#endif
+#endif
+ edid_info = EDID_INFO;
+ saved_video_mode = SAVED_VIDEO_MODE;
+ bootloader_type = LOADER_TYPE;
+
+#ifdef CONFIG_BLK_DEV_RAM
+ rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
+ rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
+ rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
+
+
+#endif
+
+ HYPERVISOR_vm_assist(VMASST_CMD_enable,
+ VMASST_TYPE_writable_pagetables);
+
ARCH_SETUP
print_memory_map(machine_specific_memory_setup());
-
- /* copy_edd(); */
+#else
+ ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
+ drive_info = DRIVE_INFO;
+ screen_info = SCREEN_INFO;
+ edid_info = EDID_INFO;
+ saved_video_mode = SAVED_VIDEO_MODE;
+ bootloader_type = LOADER_TYPE;
+
+#ifdef CONFIG_BLK_DEV_RAM
+ rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
+ rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
+ rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
+#endif
+ setup_memory_region();
+ copy_edd();
+#endif /* !CONFIG_XEN */
if (!MOUNT_ROOT_RDONLY)
root_mountflags &= ~MS_RDONLY;
init_mm.start_code = (unsigned long) &_text;
init_mm.end_code = (unsigned long) &_etext;
init_mm.end_data = (unsigned long) &_edata;
-/* init_mm.brk = (unsigned long) &_end; */
+#ifdef CONFIG_XEN
init_mm.brk = start_pfn << PAGE_SHIFT;
-
-
-#if 0 /* XEN: This is nonsense: kernel may not even be contiguous in RAM. */
+#else
+ init_mm.brk = (unsigned long) &_end;
+
code_resource.start = virt_to_phys(&_text);
code_resource.end = virt_to_phys(&_etext)-1;
data_resource.start = virt_to_phys(&_etext);
data_resource.end = virt_to_phys(&_edata)-1;
#endif
+
parse_cmdline_early(cmdline_p);
early_identify_cpu(&boot_cpu_data);
@@ -679,15 +675,11 @@
* partially used pages are not usable - thus
* we are rounding upwards:
*/
-#if 0
end_pfn = e820_end_of_ram();
-#else
- end_pfn = xen_end_of_ram();
-#endif
check_efer();
- init_memory_mapping(0, (end_pfn << PAGE_SHIFT));
+ init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
#ifdef CONFIG_ACPI_NUMA
/*
@@ -702,24 +694,25 @@
contig_initmem_init();
#endif
- /* Reserve direct mapping and shared info etc. */
-// reserve_bootmem_generic(table_start << PAGE_SHIFT, (table_end + 1 -
table_start) << PAGE_SHIFT);
-
-// reserve_bootmem_generic(0, (table_end + 1) << PAGE_SHIFT);
+#ifndef CONFIG_XEN
+ /* Reserve direct mapping */
+ reserve_bootmem_generic(table_start << PAGE_SHIFT,
+ (table_end - table_start) << PAGE_SHIFT);
/* reserve kernel */
-// kernel_end = round_up(__pa_symbol(&_end),PAGE_SIZE);
-
-#if 0
+ kernel_end = round_up(__pa_symbol(&_end),PAGE_SIZE);
+ reserve_bootmem_generic(HIGH_MEMORY, kernel_end - HIGH_MEMORY);
+
/*
* reserve physical page 0 - it's a special BIOS page on many boxes,
* enabling clean reboots, SMP operation, laptop functions.
*/
reserve_bootmem_generic(0, PAGE_SIZE);
-#endif
/* reserve ebda region */
-/* reserve_ebda_region(); */
+ reserve_ebda_region();
+#endif
+
#ifdef CONFIG_SMP
/*
@@ -739,6 +732,7 @@
*/
acpi_reserve_bootmem();
#endif
+#ifdef CONFIG_XEN
#ifdef CONFIG_BLK_DEV_INITRD
if (xen_start_info.mod_start) {
if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
@@ -756,10 +750,27 @@
}
#endif
#ifdef CONFIG_SMP
-#ifdef CONFIG_XEN
smp_alloc_memory();
#endif
-#endif
+#else /* CONFIG_XEN */
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (LOADER_TYPE && INITRD_START) {
+ if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
+ reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
+ initrd_start =
+ INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
+ initrd_end = initrd_start+INITRD_SIZE;
+ }
+ else {
+ printk(KERN_ERR "initrd extends beyond end of memory "
+ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+ (unsigned long)(INITRD_START + INITRD_SIZE),
+ (unsigned long)(end_pfn << PAGE_SHIFT));
+ initrd_start = 0;
+ }
+ }
+#endif
+#endif /* !CONFIG_XEN */
paging_init();
#ifdef CONFIG_X86_LOCAL_APIC
/*
@@ -767,30 +778,36 @@
*/
find_smp_config();
#endif
- /* Make sure we have a large enough P->M table. */
- if (end_pfn > xen_start_info.nr_pages) {
- phys_to_machine_mapping = alloc_bootmem(
- max_pfn * sizeof(unsigned long));
- memset(phys_to_machine_mapping, ~0,
- max_pfn * sizeof(unsigned long));
- memcpy(phys_to_machine_mapping,
- (unsigned long *)xen_start_info.mfn_list,
- xen_start_info.nr_pages * sizeof(unsigned long));
- free_bootmem(
- __pa(xen_start_info.mfn_list),
- PFN_PHYS(PFN_UP(xen_start_info.nr_pages *
- sizeof(unsigned long))));
- }
-
- pfn_to_mfn_frame_list = alloc_bootmem(PAGE_SIZE);
-
- for ( i=0, j=0; i < end_pfn; i+=(PAGE_SIZE/sizeof(unsigned long)), j++ )
- {
- pfn_to_mfn_frame_list[j] =
- virt_to_machine(&phys_to_machine_mapping[i]) >> PAGE_SHIFT;
- }
-
-#if 0
+#ifdef CONFIG_XEN
+ {
+ int i, j;
+ /* Make sure we have a large enough P->M table. */
+ if (end_pfn > xen_start_info.nr_pages) {
+ phys_to_machine_mapping = alloc_bootmem(
+ max_pfn * sizeof(unsigned long));
+ memset(phys_to_machine_mapping, ~0,
+ max_pfn * sizeof(unsigned long));
+ memcpy(phys_to_machine_mapping,
+ (unsigned long *)xen_start_info.mfn_list,
+ xen_start_info.nr_pages * sizeof(unsigned long));
+ free_bootmem(
+ __pa(xen_start_info.mfn_list),
+ PFN_PHYS(PFN_UP(xen_start_info.nr_pages *
+ sizeof(unsigned long))));
+ }
+
+ pfn_to_mfn_frame_list = alloc_bootmem(PAGE_SIZE);
+
+ for ( i=0, j=0; i < end_pfn; i+=(PAGE_SIZE/sizeof(unsigned
long)), j++ )
+ {
+ pfn_to_mfn_frame_list[j] =
+ virt_to_machine(&phys_to_machine_mapping[i]) >>
PAGE_SHIFT;
+ }
+
+ }
+#endif
+
+#ifndef CONFIG_XEN
check_ioapic();
#endif
@@ -806,6 +823,7 @@
*/
acpi_boot_init();
#endif
+
#ifdef CONFIG_X86_LOCAL_APIC
/*
* get boot-time SMP configuration:
@@ -817,18 +835,14 @@
#endif
#endif
- /* XXX Disable irqdebug until we have a way to avoid interrupt
- * conflicts. */
-/* noirqdebug_setup(""); */
-
-#ifdef CONFIG_XEN_PRIVILEGED_GUEST
+#if defined(CONFIG_XEN_PRIVILEGED_GUEST) || !defined(CONFIG_XEN)
/*
* Request address space for all standard RAM and ROM resources
* and also for regions reported as reserved by the e820.
*/
probe_roms();
-#endif
-/* e820_reserve_resources(); */
+ e820_reserve_resources();
+#endif
request_resource(&iomem_resource, &video_ram_resource);
@@ -845,14 +859,40 @@
iommu_hole_init();
#endif
- op.cmd = PHYSDEVOP_SET_IOPL;
- op.u.set_iopl.iopl = 1;
- HYPERVISOR_physdev_op(&op);
-
- if (xen_start_info.flags & SIF_INITDOMAIN) {
- if (!(xen_start_info.flags & SIF_PRIVILEGED))
- panic("Xen granted us console access "
- "but not privileged status");
+#ifdef CONFIG_XEN
+ {
+ physdev_op_t op;
+
+ op.cmd = PHYSDEVOP_SET_IOPL;
+ op.u.set_iopl.iopl = 1;
+ HYPERVISOR_physdev_op(&op);
+
+ if (xen_start_info.flags & SIF_INITDOMAIN) {
+ if (!(xen_start_info.flags & SIF_PRIVILEGED))
+ panic("Xen granted us console access "
+ "but not privileged status");
+
+#ifdef CONFIG_VT
+#if defined(CONFIG_VGA_CONSOLE)
+ conswitchp = &vga_con;
+#elif defined(CONFIG_DUMMY_CONSOLE)
+ conswitchp = &dummy_con;
+#endif
+#endif
+ } else {
+#ifdef CONFIG_XEN_PRIVILEGED_GUEST
+ extern const struct consw xennull_con;
+ extern int console_use_vt;
+#if defined(CONFIG_VGA_CONSOLE)
+ /* disable VGA driver */
+ ORIG_VIDEO_ISVGA = VIDEO_TYPE_VLFB;
+#endif
+ conswitchp = &xennull_con;
+ console_use_vt = 0;
+#endif
+ }
+ }
+#else /* CONFIG_XEN */
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
@@ -861,18 +901,8 @@
conswitchp = &dummy_con;
#endif
#endif
- } else {
-#ifdef CONFIG_XEN_PRIVILEGED_GUEST
- extern const struct consw xennull_con;
- extern int console_use_vt;
-#if defined(CONFIG_VGA_CONSOLE)
- /* disable VGA driver */
- ORIG_VIDEO_ISVGA = VIDEO_TYPE_VLFB;
-#endif
- conswitchp = &xennull_con;
- console_use_vt = 0;
-#endif
- }
+
+#endif /* !CONFIG_XEN */
}
static int __init get_model_name(struct cpuinfo_x86 *c)
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