[Crash-utility] [PATCH] Change the way of determining the Xen scheduler
The command line options (such as opt_sched) are discarded after boot in Xen4,
so they are no longer available. Use the "ops" variable (if exists) to
determine the active scheduler. Without this patch, crash fails during
initialization on Xen4 hypervisor dumps with 'crash: schedule data not
found.'
Signed-off-by: Petr Tesarik <ptesarik(a)suse.cz>
---
xen_hyper.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
--- a/xen_hyper.c
+++ b/xen_hyper.c
@@ -445,13 +445,21 @@ xen_hyper_schedule_init(void)
error(FATAL, "cannot malloc scheduler struct space.\n");
}
buf = GETBUF(XEN_HYPER_SCHEDULER_NAME);
- opt_sched = symbol_value("opt_sched");
+ scheduler_opt_name = XEN_HYPER_OFFSET(scheduler_opt_name);
+ if (symbol_exists("ops")) {
+ if (!readmem(symbol_value("ops") + scheduler_opt_name, KVADDR,
+ &opt_sched, sizeof(ulong), "ops.opt_name",
+ RETURN_ON_ERROR)) {
+ error(FATAL, "cannot read ops.opt_name.\n");
+ }
+ } else {
+ opt_sched = symbol_value("opt_sched");
+ }
if (!readmem(opt_sched, KVADDR, xhscht->opt_sched,
XEN_HYPER_OPT_SCHED_SIZE, "opt_sched,", RETURN_ON_ERROR)) {
error(FATAL, "cannot read opt_sched,.\n");
}
schedulers = symbol_value("schedulers");
- scheduler_opt_name = XEN_HYPER_OFFSET(scheduler_opt_name);
addr = schedulers;
while (xhscht->name == NULL) {
if (!readmem(addr, KVADDR, schedulers_buf,