Dear Dave,
We are team doing paravirtualization called OpenVZ.
We would like to run crash utility upon our kernel,
unfortunately, it's not possible without some slight modification of
crash code. The reason is the introduction some additional data
structure to the kernel code which virtualize runqueues among other
things. So the way crash reads struct rq is a bit different from vanilla
kernel.
Do you mind to check our patch for your code? We would certainly
appreciate if you consider it's including.
--
Kind regards, Kirill
--- ./defs.h.kirshil 2007-12-12 21:48:09.000000000 +0300
+++ ./defs.h 2007-12-26 14:06:12.000000000 +0300
@@ -1429,6 +1429,9 @@ struct offset_table {
long kmem_cache_cpu_freelist;
long kmem_cache_cpu_page;
long kmem_cache_cpu_node;
+ long pcpu_info_vcpu;
+ long pcpu_info_idle;
+ long vcpu_struct_rq;
};
struct size_table { /* stash of commonly-used sizes */
@@ -1532,6 +1535,8 @@ struct size_table { /* stash of
long upid;
long kmem_cache_cpu;
long cfs_rq;
+ long pcpu_info;
+ long vcpu_struct;
};
struct array_table {
--- ./kernel.c.kirshil 2007-12-12 21:48:09.000000000 +0300
+++ ./kernel.c 2007-12-26 13:50:27.000000000 +0300
@@ -475,6 +475,14 @@ kernel_init()
if (!(kt->flags & DWARF_UNWIND))
kt->flags |= NO_DWARF_UNWIND;
+ if(STRUCT_EXISTS("pcpu_info")) {
+ MEMBER_OFFSET_INIT(pcpu_info_vcpu, "pcpu_info", "vcpu");
+ MEMBER_OFFSET_INIT(pcpu_info_idle, "pcpu_info", "idle");
+ MEMBER_OFFSET_INIT(vcpu_struct_rq, "vcpu_struct", "rq");
+ STRUCT_SIZE_INIT(pcpu_info, "pcpu_info");
+ STRUCT_SIZE_INIT(vcpu_struct, "vcpu_struct");
+ }
+
BUG_bytes_init();
}
--- ./task.c.kirshil 2007-12-12 21:48:09.000000000 +0300
+++ ./task.c 2007-12-26 14:05:30.000000000 +0300
@@ -5696,8 +5696,15 @@ get_idle_threads(ulong *tasklist, int nr
cnt++;
else
BZERO(tasklist, sizeof(ulong) * NR_CPUS);
+ } else if (symbol_exists("pcpu_info") ){
+ runq=symbol_value("pcpu_info"); /* vzk */
+ runqbuf=GETBUF(SIZE(pcpu_info));
+ for (i = 0; i < nr_cpus; i++, runq += SIZE(pcpu_info)) {
+ readmem(runq,KVADDR,runqbuf,SIZE(pcpu_info),"pcpu info",FAULT_ON_ERROR);
+ tasklist[i] = ULONG(runqbuf + OFFSET(pcpu_info_idle));
+ if (IS_KVADDR(tasklist[i])) cnt++;
+ }
}
-
if (runqbuf)
FREEBUF(runqbuf);
@@ -5777,13 +5784,15 @@ int
get_active_set(void)
{
int i, cnt, per_cpu;
- ulong runq, runqaddr;
+ ulong runq, runqaddr, pcpu_info = 0;
char *runqbuf;
if (tt->flags & ACTIVE_SET)
return TRUE;
- if (symbol_exists("runqueues")) {
+ if (symbol_exists("pcpu_info") && VALID_MEMBER(pcpu_info_vcpu)) {
+ pcpu_info = symbol_value("pcpu_info");
+ } else if (symbol_exists("runqueues")) {
runq = symbol_value("runqueues");
per_cpu = FALSE;
} else if (symbol_exists("per_cpu__runqueues")) {
@@ -5796,7 +5805,23 @@ get_active_set(void)
runqbuf = GETBUF(SIZE(runqueue));
cnt = 0;
- if (VALID_MEMBER(runqueue_curr) && per_cpu) {
+ if (pcpu_info != 0) {
+ ulong vcpu_struct;
+ char *pcpu_info_buf, *vcpu_struct_buf;
+
+ pcpu_info_buf = GETBUF(SIZE(pcpu_info));
+ vcpu_struct_buf = GETBUF(SIZE(vcpu_struct));
+ for (i = 0; i < kt->cpus; i++, pcpu_info += SIZE(pcpu_info)) {
+ readmem(pcpu_info,KVADDR,pcpu_info_buf,SIZE(pcpu_info), "pcpu_info",FAULT_ON_ERROR);
+ vcpu_struct= ULONG(pcpu_info_buf +OFFSET(pcpu_info_vcpu));
+ readmem(vcpu_struct,KVADDR,vcpu_struct_buf,SIZE(vcpu_struct),"pcpu_info->vcpu",FAULT_ON_ERROR);
+ tt->active_set[i] = ULONG(vcpu_struct_buf+OFFSET(vcpu_struct_rq)+OFFSET(runqueue_curr));
+ if (IS_KVADDR(tt->active_set[i]))
+ cnt++;
+ }
+ FREEBUF(pcpu_info_buf);
+ FREEBUF(vcpu_struct_buf);
+ } else if (VALID_MEMBER(runqueue_curr) && per_cpu) {
for (i = 0; i < kt->cpus; i++) {
if ((kt->flags & SMP) && (kt->flags & PER_CPU_OFF)) {
runq = symbol_value("per_cpu__runqueues") +
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