Re: 2.6.18-mm2 boot failure on x86-64

From: Andi Kleen
Date: Thu Oct 05 2006 - 15:05:54 EST

On Thursday 05 October 2006 20:51, Steve Fox wrote:
> On Thu, 2006-10-05 at 20:27 +0200, Andi Kleen wrote:
>
> > I guess we need to track when it gets corrupted. Can you send the full
> > boot log with this patch applied?
>
> Here she blows!

Can you please try it again with this patch to narrow it down further?

-Andi

Index: linux-2.6.19-rc1-hack/init/main.c
===================================================================
--- linux-2.6.19-rc1-hack.orig/init/main.c
+++ linux-2.6.19-rc1-hack/init/main.c
@@ -75,6 +75,9 @@

static int init(void *);

+extern void bugcheck(char *, int);
+#define CHECK bugcheck(__FILE__, __LINE__)
+
extern void init_IRQ(void);
extern void fork_init(unsigned long);
extern void mca_init(void);
@@ -480,6 +483,8 @@ asmlinkage void __init start_kernel(void
char * command_line;
extern struct kernel_param __start___param[], __stop___param[];

+ CHECK;
+
smp_setup_processor_id();

/*
@@ -502,7 +507,9 @@ asmlinkage void __init start_kernel(void
page_address_init();
printk(KERN_NOTICE);
printk(linux_banner);
+ CHECK;
setup_arch(&command_line);
+ CHECK;
setup_per_cpu_areas();
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */

@@ -517,6 +524,7 @@ asmlinkage void __init start_kernel(void
* fragile until we cpu_idle() for the first time.
*/
preempt_disable();
+ CHECK;
build_all_zonelists();
page_alloc_init();
printk(KERN_NOTICE "Kernel command line: %s\n", saved_command_line);
@@ -525,6 +533,7 @@ asmlinkage void __init start_kernel(void
__stop___param - __start___param,
&unknown_bootoption);
sort_main_extable();
+ CHECK;
trap_init();
rcu_init();
init_IRQ();
@@ -533,8 +542,10 @@ asmlinkage void __init start_kernel(void
hrtimers_init();
softirq_init();
timekeeping_init();
+ CHECK;
time_init();
profile_init();
+ CHECK;
if (!irqs_disabled())
printk("start_kernel(): bug: interrupts were enabled early\n");
early_boot_irqs_on();
@@ -568,7 +579,9 @@ asmlinkage void __init start_kernel(void
#endif
vfs_caches_init_early();
cpuset_init_early();
+ CHECK;
mem_init();
+ CHECK;
kmem_cache_init();
setup_per_cpu_pageset();
numa_policy_init();
@@ -577,6 +590,7 @@ asmlinkage void __init start_kernel(void
calibrate_delay();
pidmap_init();
pgtable_cache_init();
+ CHECK;
prio_tree_init();
anon_vma_init();
#ifdef CONFIG_X86
@@ -586,12 +600,14 @@ asmlinkage void __init start_kernel(void
fork_init(num_physpages);
proc_caches_init();
buffer_init();
+ CHECK;
unnamed_dev_init();
key_init();
security_init();
vfs_caches_init(num_physpages);
radix_tree_init();
signals_init();
+ CHECK;
/* rootfs populating might need page-writeback */
page_writeback_init();
#ifdef CONFIG_PROC_FS
@@ -599,6 +615,7 @@ asmlinkage void __init start_kernel(void
#endif
cpuset_init();
taskstats_init_early();
+ CHECK;
delayacct_init();

check_bugs();
@@ -609,7 +626,7 @@ asmlinkage void __init start_kernel(void
rest_init();
}

-static int __initdata initcall_debug;
+static int __initdata initcall_debug = 1;

static int __init initcall_debug_setup(char *str)
{
@@ -639,7 +656,11 @@ static void __init do_initcalls(void)
printk("\n");
}

+ CHECK;
+
result = (*call)();
+
+ CHECK;

if (result && result != -ENODEV && initcall_debug) {
sprintf(msgbuf, "error code %d", result);
@@ -725,21 +746,32 @@ static int init(void * unused)

smp_prepare_cpus(max_cpus);

+ CHECK;
+
do_pre_smp_initcalls();

smp_init();
+
+ CHECK;
+
sched_init_smp();

cpuset_init_smp();

+ CHECK;
+
/*
* Do this before initcalls, because some drivers want to access
* firmware files.
*/
populate_rootfs();

+ CHECK;
+
do_basic_setup();

+ CHECK;
+
/*
* check if there is an early userspace init. If yes, let it do all
* the work
Index: linux-2.6.19-rc1-hack/net/xfrm/xfrm_policy.c
===================================================================
--- linux-2.6.19-rc1-hack.orig/net/xfrm/xfrm_policy.c
+++ linux-2.6.19-rc1-hack/net/xfrm/xfrm_policy.c
@@ -39,6 +39,16 @@ EXPORT_SYMBOL(xfrm_policy_count);
static DEFINE_RWLOCK(xfrm_policy_afinfo_lock);
static struct xfrm_policy_afinfo *xfrm_policy_afinfo[NPROTO];

+void bugcheck(char *where, int line)
+{
+ int i;
+ for (i = 0; i < NPROTO; i++)
+ if (xfrm_policy_afinfo[i] == (void *)-1UL) {
+ panic("afinfo corrupted at %s:%d\n",where,line);
+ return;
+ }
+}
+
static kmem_cache_t *xfrm_dst_cache __read_mostly;

static struct work_struct xfrm_policy_gc_work;
Index: linux-2.6.19-rc1-hack/arch/x86_64/kernel/setup.c
===================================================================
--- linux-2.6.19-rc1-hack.orig/arch/x86_64/kernel/setup.c
+++ linux-2.6.19-rc1-hack/arch/x86_64/kernel/setup.c
@@ -65,6 +65,12 @@
#include <asm/sections.h>
#include <asm/dmi.h>

+
+
+extern void bugcheck(char *, int);
+#define CHECK bugcheck(__FILE__, __LINE__)
+
+
/*
* Machine setup..
*/
@@ -351,14 +357,22 @@ void __init setup_arch(char **cmdline_p)
saved_video_mode = SAVED_VIDEO_MODE;
bootloader_type = LOADER_TYPE;

+ CHECK;
+
#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
+
+ CHECK;
+
setup_memory_region();
+ CHECK;
copy_edd();

+ CHECK;
+
if (!MOUNT_ROOT_RDONLY)
root_mountflags &= ~MS_RDONLY;
init_mm.start_code = (unsigned long) &_text;
@@ -373,14 +387,25 @@ void __init setup_arch(char **cmdline_p)

early_identify_cpu(&boot_cpu_data);

+ CHECK;
+
+
strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
*cmdline_p = command_line;

+ CHECK;
+
+
parse_early_param();

+ CHECK;
+
finish_e820_parsing();
+ CHECK;

e820_register_active_regions(0, 0, -1UL);
+ CHECK;
+
/*
* partially used pages are not usable - thus
* we are rounding upwards:
@@ -389,14 +414,19 @@ void __init setup_arch(char **cmdline_p)
num_physpages = end_pfn;

check_efer();
+ CHECK;

discover_ebda();
+ CHECK;

init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
+ CHECK;

dmi_scan_machine();
+ CHECK;

zap_low_mappings(0);
+ CHECK;

#ifdef CONFIG_ACPI
/*
@@ -405,6 +435,7 @@ void __init setup_arch(char **cmdline_p)
*/
acpi_boot_table_init();
#endif
+ CHECK;

/* How many end-of-memory variables you have, grandma! */
max_low_pfn = end_pfn;
@@ -413,6 +444,7 @@ void __init setup_arch(char **cmdline_p)

/* Remove active ranges so rediscovery with NUMA-awareness happens */
remove_all_active_ranges();
+ CHECK;

#ifdef CONFIG_ACPI_NUMA
/*
@@ -420,20 +452,24 @@ void __init setup_arch(char **cmdline_p)
*/
acpi_numa_init();
#endif
+ CHECK;

#ifdef CONFIG_NUMA
numa_initmem_init(0, end_pfn);
#else
contig_initmem_init(0, end_pfn);
#endif
+ CHECK;

/* Reserve direct mapping */
reserve_bootmem_generic(table_start << PAGE_SHIFT,
(table_end - table_start) << PAGE_SHIFT);
+ CHECK;

/* reserve kernel */
reserve_bootmem_generic(__pa_symbol(&_text),
__pa_symbol(&_end) - __pa_symbol(&_text));
+ CHECK;

/*
* reserve physical page 0 - it's a special BIOS page on many boxes,
@@ -444,6 +480,7 @@ void __init setup_arch(char **cmdline_p)
/* reserve ebda region */
if (ebda_addr)
reserve_bootmem_generic(ebda_addr, ebda_size);
+ CHECK;

#ifdef CONFIG_SMP
/*
@@ -456,6 +493,7 @@ void __init setup_arch(char **cmdline_p)
/* Reserve SMP trampoline */
reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
#endif
+ CHECK;

#ifdef CONFIG_ACPI_SLEEP
/*
@@ -463,10 +501,14 @@ void __init setup_arch(char **cmdline_p)
*/
acpi_reserve_bootmem();
#endif
+ CHECK;
+
/*
* Find and reserve possible boot-time SMP configuration:
*/
find_smp_config();
+ CHECK;
+
#ifdef CONFIG_BLK_DEV_INITRD
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
@@ -484,18 +526,23 @@ void __init setup_arch(char **cmdline_p)
}
}
#endif
+ CHECK;
+
#ifdef CONFIG_KEXEC
if (crashk_res.start != crashk_res.end) {
reserve_bootmem_generic(crashk_res.start,
crashk_res.end - crashk_res.start + 1);
}
#endif
+ CHECK;

paging_init();
+ CHECK;

#ifdef CONFIG_PCI
early_quirks();
#endif
+ CHECK;

/*
* set this early, so we dont allocate cpu0
@@ -509,25 +556,36 @@ void __init setup_arch(char **cmdline_p)
*/
acpi_boot_init();
#endif
+ CHECK;

init_cpu_to_node();
+ CHECK;

/*
* get boot-time SMP configuration:
*/
if (smp_found_config)
get_smp_config();
+ CHECK;
+
init_apic_mappings();
+ CHECK;

/*
* Request address space for all standard RAM and ROM resources
* and also for regions reported as reserved by the e820.
*/
probe_roms();
+ CHECK;
+
e820_reserve_resources();
+ CHECK;
+
e820_mark_nosave_regions();
+ CHECK;

request_resource(&iomem_resource, &video_ram_resource);
+ CHECK;

{
unsigned i;
@@ -535,8 +593,10 @@ void __init setup_arch(char **cmdline_p)
for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
request_resource(&ioport_resource, &standard_io_resources[i]);
}
+ CHECK;

e820_setup_gap();
+ CHECK;

#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
-
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