From b9dc76e232e0226a14ae3089e3be5c915f2bb981 Mon Sep 17 00:00:00 2001 From: Lianbo Jiang Date: Mon, 10 Jan 2022 17:25:06 +0800 Subject: [PATCH 03/10] Fix for HZ calculation on Linux 5.14 and later Kernel commit 3e9a99eba058 ("block/mq-deadline: Rename dd_init_queue() and dd_exit_queue()") renamed dd_init_queue to dd_init_sched. Without the patch, the 'help -m' may print incorrect hz value as follows: crash> help -m | grep hz hz: 1000 <---The correct hz value on ppc64le machine is 100. ^^^^ Fixes: b93027ce5c75 ("Add alternate HZ calculation using write_expire") Signed-off-by: Lianbo Jiang --- task.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/task.c b/task.c index b5ddc88e0acb..76e184ae70b1 100644 --- a/task.c +++ b/task.c @@ -440,6 +440,8 @@ task_init(void) } } else if ((symbol_exists("dd_init_queue") && gdb_set_crash_scope(symbol_value("dd_init_queue"), "dd_init_queue")) || + (symbol_exists("dd_init_sched") && + gdb_set_crash_scope(symbol_value("dd_init_sched"), "dd_init_sched")) || (symbol_exists("deadline_init_queue") && gdb_set_crash_scope(symbol_value("deadline_init_queue"), "deadline_init_queue"))) { char buf[BUFSIZE]; -- 2.20.1