c0fee2da8e
Story: 2007308 Task: 38795 Depends-On: https://review.opendev.org/#/c/722017/ Depends-On: https://review.opendev.org/#/c/722019/ Change-Id: I942b2aa6167120157a38af83135ed358b17ee78b Signed-off-by: Dongqi Chen <chen.dq@neusoft.com>
46 lines
1.9 KiB
Diff
46 lines
1.9 KiB
Diff
From e2e6b3f625a3a6cc0202c60ce93ca9d300cb6b9b Mon Sep 17 00:00:00 2001
|
|
From: Alex Kozyrev <alex.kozyrev@windriver.com>
|
|
Date: Fri, 16 Mar 2018 15:50:57 -0400
|
|
Subject: [PATCH 1/2] restrict iSCSI kthreads to CPUs in cpu_kthread_mask
|
|
|
|
Do not allow them to run on other CPUs to prevent interference with VMs.
|
|
|
|
Signed-off-by: Alex Kozyrev <alex.kozyrev@windriver.com>
|
|
Signed-off-by: Jim Somerville <Jim.Somerville@windriver.com>
|
|
Signed-off-by: Austin Sun <austin.sun@intel.com>
|
|
---
|
|
drivers/target/iscsi/iscsi_target.c | 4 ++--
|
|
include/linux/cpumask.h | 1 +
|
|
2 files changed, 3 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
|
|
index 5ce6e2a40..a38c73525 100644
|
|
--- a/drivers/target/iscsi/iscsi_target.c
|
|
+++ b/drivers/target/iscsi/iscsi_target.c
|
|
@@ -3543,8 +3543,8 @@ void iscsit_thread_get_cpumask(struct iscsi_conn *conn)
|
|
* iSCSI connection's RX/TX threads will be scheduled to
|
|
* execute upon.
|
|
*/
|
|
- ord = conn->bitmap_id % cpumask_weight(cpu_online_mask);
|
|
- for_each_online_cpu(cpu) {
|
|
+ ord = conn->bitmap_id % cpumask_weight(cpu_kthread_mask);
|
|
+ for_each_kthread_cpu(cpu) {
|
|
if (ord-- == 0) {
|
|
cpumask_set_cpu(cpu, conn->conn_cpumask);
|
|
return;
|
|
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
|
|
index 57f20a0a7..7029aeae7 100644
|
|
--- a/include/linux/cpumask.h
|
|
+++ b/include/linux/cpumask.h
|
|
@@ -770,6 +770,7 @@ extern const DECLARE_BITMAP(cpu_all_bits, NR_CPUS);
|
|
#define for_each_possible_cpu(cpu) for_each_cpu((cpu), cpu_possible_mask)
|
|
#define for_each_online_cpu(cpu) for_each_cpu((cpu), cpu_online_mask)
|
|
#define for_each_present_cpu(cpu) for_each_cpu((cpu), cpu_present_mask)
|
|
+#define for_each_kthread_cpu(cpu) for_each_cpu((cpu), cpu_kthread_mask)
|
|
|
|
/* Wrappers for arch boot code to manipulate normally-constant masks */
|
|
void init_cpu_present(const struct cpumask *src);
|
|
--
|
|
2.19.1
|
|
|