From: Zqiang <qiang.zhang@linux.dev>
To: paulmck@kernel.org, frederic@kernel.org,
neeraj.upadhyay@kernel.org, joelagnelf@nvidia.com,
urezki@gmail.com, boqun@kernel.org
Cc: qiang.zhang@linux.dev, rcu@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] rcutorture: Make tasks-tracing support duplicate call testing
Date: Fri, 23 Oct 2026 17:40:39 +0800 [thread overview]
Message-ID: <20261023094039.29696-1-qiang.zhang@linux.dev> (raw)
Currently, Tasks-tracing has been reimplemented by SRCU-fast, it supports
the detection of duplicate calls with CONFIG_DEBUG_OBJECTS_RCU_HEAD=y.
This commit therefore set tasks_tracing_ops.debug_objects to 1, enabling
rcutorture's duplicate-call test for the tasks-tracing flavor.
Signed-off-by: Zqiang <qiang.zhang@linux.dev>
---
Simple output from rcutorture:
[ 4.120772][ T1] call_srcu(): Leaked duplicate callback
[ 4.120776][ T1] WARNING: kernel/rcu/srcutree.c:1516 at __call_srcu+0x463/0x580, CPU#7: swapper/0/1
[ 4.122665][ T1] Modules linked in:
[ 4.123026][ T1] CPU: 7 UID: 0 PID: 1 Comm: swapper/0 Tainted: G W 7.3.0-rc1+ #110 PREEMPT(full) 8fac67ca5e4b530c23977b2e660a83979ea107db
[ 4.124328][ T1] Tainted: [W]=WARN
[ 4.124687][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
[ 4.125583][ T1] RIP: 0010:__call_srcu+0x463/0x580
[ 4.126056][ T1] Code: 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 16 99 9f 03 80 3c 02 00 0f 85 e8 00 00 00 49 c7 46 08 70 cf 4e b4 48 8d 3d ad da d5 06 <67> 48 0f b9 3a eb a6 48 8d 3d af da d5 06 67 48 0f b9 3a eb 98 0f
[ 4.127823][ T1] RSP: 0000:ffff888100e87a78 EFLAGS: 00010246
[ 4.128389][ T1] RAX: dffffc0000000000 RBX: 1ffff110201d0f54 RCX: 0000000000000001
[ 4.129111][ T1] RDX: 1ffff110201d0f8f RSI: ffffffffb8ae6d60 RDI: ffffffffbb255590
[ 4.129842][ T1] RBP: ffff888100e87b28 R08: ffff888100e87c70 R09: ffffffffb818a820
[ 4.130572][ T1] R10: fffffbfff76449ac R11: ffffffffbb224d67 R12: 0000000000000001
[ 4.131296][ T1] R13: 00000000ffffffea R14: ffff888100e87c70 R15: ffffffffba4c4220
[ 4.132061][ T1] FS: 0000000000000000(0000) GS:ffff888239af2000(0000) knlGS:0000000000000000
[ 4.132903][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4.133536][ T1] CR2: 0000000000000000 CR3: 000000008a8ea000 CR4: 00000000000026f0
[ 4.134283][ T1] Call Trace:
[ 4.134607][ T1] <TASK>
[ 4.134898][ T1] ? __pfx_rcu_torture_err_cb+0x10/0x10
[ 4.135425][ T1] ? __pfx___call_srcu+0x10/0x10
[ 4.135870][ T1] ? __pfx__printk+0x10/0x10
[ 4.136301][ T1] call_srcu+0x17/0x20
[ 4.136685][ T1] call_rcu_tasks_trace+0x1a/0x20
[ 4.137143][ T1] rcu_torture_init+0x3033/0x3800
[ 4.137617][ T1] ? __kvm_handle_async_pf+0x21/0xb0
[ 4.138094][ T1] ? __pfx_native_sched_clock+0x1/0x10
[ 4.138608][ T1] ? __pfx_rcu_torture_init+0x10/0x10
[ 4.139109][ T1] ? add_device_randomness+0xcb/0x110
[ 4.139637][ T1] ? __this_cpu_preempt_check+0x17/0x20
[ 4.140160][ T1] ? lockdep_hardirqs_on+0xde/0x160
[ 4.140653][ T1] ? _raw_spin_unlock_irqrestore+0x6e/0x80
[ 4.141211][ T1] ? _raw_spin_unlock_irqrestore+0x53/0x80
[ 4.141772][ T1] ? __pfx_rcu_torture_leak_cb+0x10/0x10
[ 4.142291][ T1] ? add_device_randomness+0xcb/0x110
[ 4.142828][ T1] ? __pfx_add_device_randomness+0x10/0x10
[ 4.143397][ T1] ? __pfx_srcu_leak_callback+0x10/0x10
[ 4.143937][ T1] ? __pfx_rcu_torture_init+0x10/0x10
[ 4.144440][ T1] do_one_initcall+0xd9/0x620
[ 4.144878][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 4.145390][ T1] ? __kasan_kmalloc+0x86/0xa0
[ 4.145963][ T1] ? __kmalloc_noprof+0x2c9/0x610
[ 4.146576][ T1] kernel_init_freeable+0xb00/0x11a0
[ 4.147214][ T1] ? __pfx_kernel_init+0x10/0x10
[ 4.147804][ T1] kernel_init+0x28/0x170
[ 4.148308][ T1] ret_from_fork+0x7be/0xaf0
[ 4.148880][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 4.149512][ T1] ? __kasan_check_read+0x15/0x20
[ 4.150111][ T1] ? __switch_to+0x1b0/0xeb0
[ 4.150778][ T1] ? __switch_to_asm+0x39/0x70
[ 4.151324][ T1] ? __pfx_kernel_init+0x10/0x10
[ 4.151910][ T1] ret_from_fork_asm+0x1a/0x30
kernel/rcu/rcutorture.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 1bbf8192786a..c0c8fbdb5508 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -1313,6 +1313,7 @@ static struct rcu_torture_ops tasks_tracing_ops = {
.irq_capable = 1,
.slow_gps = 1,
.nmi_capable = 1,
+ .debug_objects = 1,
.name = "tasks-tracing"
};
--
2.17.1
next reply other threads:[~2026-10-23 9:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-23 9:40 Zqiang [this message]
2026-10-23 19:12 ` [PATCH] rcutorture: Make tasks-tracing support duplicate call testing Paul E. McKenney
2026-10-26 22:56 ` Joel Fernandes
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20261023094039.29696-1-qiang.zhang@linux.dev \
--to=qiang.zhang@linux.dev \
--cc=boqun@kernel.org \
--cc=frederic@kernel.org \
--cc=joelagnelf@nvidia.com \
--cc=linux-kernel@vger.kernel.org \
--cc=neeraj.upadhyay@kernel.org \
--cc=paulmck@kernel.org \
--cc=rcu@vger.kernel.org \
--cc=urezki@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.