lkml.org 
[lkml]   [2023]   [Aug]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/3] iocost_monitor: fix kernel queue kobj changes
Date
From: Chengming Zhou <zhouchengming@bytedance.com>

When I use iocost_monitor on nvme0n1, this error shows up:
"Could not find ioc for nvme0n1"

There is no kobj in struct queue in recent kernel, it seems that the commit
2bd85221a625 ("block: untangle request_queue refcounting from sysfs")
move the queue kobj to struct gendisk.

Fix it by using mq_kobj which is at the same level with queue kobj.

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
---
tools/cgroup/iocost_monitor.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/cgroup/iocost_monitor.py b/tools/cgroup/iocost_monitor.py
index 0dbbc67400fc..7aa076cb559e 100644
--- a/tools/cgroup/iocost_monitor.py
+++ b/tools/cgroup/iocost_monitor.py
@@ -221,7 +221,7 @@ ioc = None
for i, ptr in radix_tree_for_each(blkcg_root.blkg_tree.address_of_()):
blkg = drgn.Object(prog, 'struct blkcg_gq', address=ptr)
try:
- if devname == blkg.q.kobj.parent.name.string_().decode('utf-8'):
+ if devname == blkg.q.mq_kobj.parent.name.string_().decode('utf-8'):
q_id = blkg.q.id.value_()
if blkg.pd[plid]:
root_iocg = container_of(blkg.pd[plid], 'struct ioc_gq', 'pd')
--
2.41.0
\
 
 \ /
  Last update: 2023-08-04 08:53    [W:0.058 / U:0.192 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site