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Message-ID: <20200223135614.GP14493@shao2-debian>
Date: Sun, 23 Feb 2020 21:56:14 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Sultan Alsawaf <sultan@...neltoast.com>
Cc: 0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
lkp@...ts.01.org
Subject: [mm] c8e0bd1499: WARNING:at_lib/refcount.c:#refcount_warn_saturate
FYI, we noticed the following commit (built with gcc-7):
commit: c8e0bd1499ea2c2eef043f084fff431b2e25edf1 ("mm: Stop kswapd early when nothing's waiting for it to free pages")
https://github.com/0day-ci/linux/commits/Sultan-Alsawaf/mm-Stop-kswapd-early-when-nothing-s-waiting-for-it-to-free-pages/20200221-212820
in testcase: trinity
with following parameters:
runtime: 300s
test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/
on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+---------------------------------------------------+------------+------------+
| | ca7e1fd102 | c8e0bd1499 |
+---------------------------------------------------+------------+------------+
| boot_successes | 17 | 35 |
| boot_failures | 0 | 13 |
| WARNING:at_lib/refcount.c:#refcount_warn_saturate | 0 | 13 |
| EIP:refcount_warn_saturate | 0 | 13 |
+---------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>
[ 140.072380] WARNING: CPU: 0 PID: 2037 at lib/refcount.c:25 refcount_warn_saturate+0x8a/0xf0
[ 140.073100] Modules linked in:
[ 140.073325] CPU: 0 PID: 2037 Comm: trinity-c6 Not tainted 5.6.0-rc2-00056-gc8e0bd1499ea2 #1
[ 140.073917] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 140.074525] EIP: refcount_warn_saturate+0x8a/0xf0
[ 140.074863] Code: 00 03 dd c2 01 e8 86 6d a4 ff 0f 0b 58 c9 c3 90 80 3d ff 02 dd c2 00 75 b4 68 84 5e a8 c2 c6 05 ff 02 dd c2 01 e8 66 6d a4 ff <0f> 0b 58 c9 c3 90 80 3d 01 03 dd c2 00 75 94 68 38 5e a8 c2 c6 05
[ 140.076166] EAX: 0000002a EBX: c2dc3034 ECX: f42c6500 EDX: c10bbe0c
[ 140.076611] ESI: c2dc2880 EDI: 00100cca EBP: f6b43c30 ESP: f6b43c2c
[ 140.077054] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010296
[ 140.077708] CR0: 80050033 CR2: b78fbc5c CR3: 2516a000 CR4: 00040690
[ 140.078447] Call Trace:
[ 140.078758] __alloc_pages_nodemask+0xe74/0xf70
[ 140.079294] ? percpu_counter_add_batch+0x9b/0xd0
[ 140.079766] ? percpu_counter_add_batch+0x9b/0xd0
[ 140.080105] ? trace_preempt_off+0x23/0xf0
[ 140.080400] ? percpu_counter_add_batch+0x9b/0xd0
[ 140.080735] ? __vm_enough_memory+0x21/0xe0
[ 140.081036] shmem_alloc_and_acct_page+0x44/0x180
[ 140.081449] ? find_get_entry+0x118/0x2e0
[ 140.081736] ? find_get_entry+0x12c/0x2e0
[ 140.082023] ? mark_held_locks+0x3f/0x70
[ 140.082305] shmem_getpage_gfp+0xfd/0x680
[ 140.082611] ? mark_held_locks+0x3f/0x70
[ 140.082894] shmem_file_read_iter+0xda/0x3c0
[ 140.083202] generic_file_splice_read+0xd4/0x170
[ 140.083533] ? pipe_to_user+0x30/0x30
[ 140.083796] do_splice_to+0x55/0x70
[ 140.084049] splice_direct_to_actor+0xcb/0x270
[ 140.084387] ? generic_pipe_buf_nosteal+0x10/0x10
[ 140.084931] do_splice_direct+0x79/0xc0
[ 140.085385] do_sendfile+0x1fd/0x3d0
[ 140.085806] sys_sendfile+0x56/0xc0
[ 140.086221] do_fast_syscall_32+0x84/0x310
[ 140.091074] entry_SYSENTER_32+0xc2/0x128
[ 140.091563] EIP: 0xb7f5eb19
[ 140.091903] Code: 5e 5d c3 8d b6 00 00 00 00 b8 80 96 98 00 eb c2 8b 04 24 c3 8b 14 24 c3 8b 1c 24 c3 8b 3c 24 c3 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76
[ 140.093977] EAX: ffffffda EBX: 0000011d ECX: 0000011d EDX: b74b8000
[ 140.094746] ESI: 151c0d0c EDI: 00000041 EBP: 6b6e8dda ESP: bf89081c
[ 140.095465] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000296
[ 140.096232] irq event stamp: 1565584
[ 140.096654] hardirqs last enabled at (1565583): [<c10ba78d>] console_unlock+0x47d/0x640
[ 140.097581] hardirqs last disabled at (1565584): [<c1001950>] trace_hardirqs_off_thunk+0xc/0x10
[ 140.098601] softirqs last enabled at (1553540): [<c20cb8a5>] __do_softirq+0x315/0x44b
[ 140.099544] softirqs last disabled at (1553355): [<c100cb4d>] do_softirq_own_stack+0x1d/0x30
[ 140.100535] ---[ end trace 864daf0120782c5d ]---
To reproduce:
# build kernel
cd linux
cp config-5.6.0-rc2-00056-gc8e0bd1499ea2 .config
make HOSTCC=gcc-7 CC=gcc-7 ARCH=i386 olddefconfig prepare modules_prepare bzImage
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Rong Chen
View attachment "config-5.6.0-rc2-00056-gc8e0bd1499ea2" of type "text/plain" (151043 bytes)
View attachment "job-script" of type "text/plain" (4435 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (33780 bytes)
View attachment "trinity" of type "text/plain" (2229 bytes)
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