Hi Dave,
I noticed that the "timer" command prints somewhat wrongly for RHEL7.6 or
later kernels (not including RHEL8 / upstream) and found that it is because
struct tvec and tvec_root have an array of list_head, instead of hlist_head
in upstream kernels.
So the following patch looks good only for RHEL7, but I don't know how we
should determine the list type in order to switch the size, etc in this case.
What do you think?
Thanks,
Kazu
---
diff --git a/kernel.c b/kernel.c
index a79e5a3010ea..419cca3ac7ae 100644
--- a/kernel.c
+++ b/kernel.c
@@ -8376,7 +8376,7 @@ dump_timer_data_tvec_bases_v3(const ulong *cpus)
char buf4[BUFSIZE];
vec_root_size = vec_size = 0;
- head_size = SIZE(hlist_head);
+ head_size = SIZE(list_head);
if ((i = get_array_length("tvec_root.vec", NULL, head_size)))
vec_root_size = i;
@@ -8804,19 +8804,19 @@ do_timer_list_v3(ulong vec_kvaddr,
tdx++;
}
- readmem(vec_kvaddr, KVADDR, vec, SIZE(hlist_head) * size,
+ readmem(vec_kvaddr, KVADDR, vec, SIZE(list_head) * size,
"timer_list vec array", FAULT_ON_ERROR);
ld = &list_data;
timer_list_buf = GETBUF(SIZE(timer_list));
- for (i = count = 0; i < size; i++, vec_kvaddr += SIZE(hlist_head)) {
+ for (i = count = 0; i < size; i++, vec_kvaddr += SIZE(list_head)) {
- if (vec[i] == 0)
+ if (vec[i*2] == vec_kvaddr)
continue;
BZERO(ld, sizeof(struct list_data));
- ld->start = vec[i];
+ ld->start = vec[i*2];
ld->list_head_offset = OFFSET(timer_list_entry);
ld->end = vec_kvaddr;
ld->flags = RETURN_ON_LIST_ERROR;
--
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