FYI, we noticed the below changes on
https://github.com/0day-ci/linux Jiri-Kosina/PM-vfs-use-filesystem-freezing-instead-of-kthread-freezer/20151030-215223
commit e8de7ec5cc871dacba9149fe6b5aacc545baef2c ("freezer: warn if anyone is trying to use freezer on kthreads")
+------------------------------------------------+------------+------------+
| | f5121659bb | e8de7ec5cc |
+------------------------------------------------+------------+------------+
| boot_successes | 15 | 11 |
| boot_failures | 0 | 3 |
| WARNING:at_include/linux/freezer.h:#svc_recv() | 0 | 3 |
| backtrace:nfs4_callback_svc | 0 | 3 |
+------------------------------------------------+------------+------------+
wget --local-encoding=UTF-8 --retry-connrefused --waitretry 1000 --tries 1000 http://inn:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/scheduled/vm-kbuild-1G-16/bisect_boot-1-debian-x86_64-2015-02-07.cgz-x86_64-acpi-redef-e8de7ec5cc871dacba9149fe6b5aacc545baef2c-20151031-105622-1k6mt59-0.yaml&job_state=running -q -O /dev/null
wait for background monitors: oom-killer watchdog
wget --local-encoding=UTF-8 --retry-connrefused --waitretry 1000 --tries 1000 http://inn:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/scheduled/vm-kbuild-1G-16/bisect_boot-1-debian-x86_64-2015-02-07.cgz-x86_64-acpi-redef-e8de7ec5cc871dacba9149fe6b5aacc545baef2c-20151031-105622-1k6mt59-0.yaml&loadavg=0.68 0.16 0.05 1/118 817&start_time=1446232943&end_time=1446232944&version=/lkp/lkp/.src-20151030-185949& -q -O /dev/null
[ 25.953285] WARNING: CPU: 1 PID: 699 at include/linux/freezer.h:62 svc_recv+0x3eb/0x80c()
[ 25.954875] CPU: 1 PID: 699 Comm: nfsv4.0-svc Not tainted 4.3.0-rc7-00003-ge8de7ec #304
[ 25.956198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 25.958815] 0000000000000000 ffff88003ed9bd78 ffffffff813d2273 0000000000000000
[ 25.960135] ffff88003ed9bdb0 ffffffff8107708b ffffffff81c4c17c ffff88003e0d2000
[ 25.961434] ffff88003eee8000 ffff88003f3df240 7fffffffffffffff ffff88003ed9bdc0
[ 25.962727] Call Trace:
[ 25.963151] [<ffffffff813d2273>] dump_stack+0x4b/0x6c
[ 25.963999] [<ffffffff8107708b>] warn_slowpath_common+0x8a/0xa3
[ 25.965015] [<ffffffff81c4c17c>] ? svc_recv+0x3eb/0x80c
[ 25.965888] [<ffffffff8107716b>] warn_slowpath_null+0x15/0x17
[ 25.966839] [<ffffffff81c4c17c>] svc_recv+0x3eb/0x80c
[ 25.967687] [<ffffffff81c78ca7>] ? __schedule+0x5cf/0x823
[ 25.968629] [<ffffffff8123f93a>] ? nfs_callback_authenticate+0x29/0x29
[ 25.969704] [<ffffffff8123f95d>] nfs4_callback_svc+0x23/0x3c
[ 25.970644] [<ffffffff8108e0ad>] kthread+0xf6/0xfe
[ 25.971448] [<ffffffff8108dfb7>] ? __kthread_parkme+0x82/0x82
[ 25.972432] [<ffffffff81c7dfdf>] ret_from_fork+0x3f/0x70
[ 25.973328] [<ffffffff8108dfb7>] ? __kthread_parkme+0x82/0x82
[ 25.974283] ---[ end trace d811f9ece3901e91 ]---
[ 25.980080] ------------[ cut here ]------------
Thanks,
Ying Huang