https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209421
Bug ID: 209421
Summary: Processes hangs in D state, suspfs or vofflock wchan
under FreeBSD 10.X
Product: Base System
Version: 10.3-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: work+free...@vvv.kiev.ua
CC: freebsd-am...@freebsd.org
CC: freebsd-am...@freebsd.org
Sometimes processes go to D state and never change to other states under
FreeBSD from 10.0 to 10.3. Than new and new processes go to D state until
server hangs at all. There is no disk activity at that time.
uname -a:
FreeBSD hostname 10.3-RELEASE FreeBSD 10.3-RELEASE #0 r297264: Fri Mar 25
02:10:02 UTC 2016 r...@releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC
amd64
ps auxwwO wchan:
USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME
COMMAND PID WCHAN TT STAT TIME COMMAND
www 1395 0,0 0,0 97932 7704 - D 11:12AM 0:00,02
/usr/local/sbin/ 1395 suspfs - D 0:00,02 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd_ssl.conf -c PidFile /var/run/httpd.ssl.pid
www 2273 0,0 0,0 97932 7652 - D 11:14AM 0:00,02
/usr/local/sbin/ 2273 vofflock - D 0:00,02 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd_ssl.conf -c PidFile /var/run/httpd.ssl.pid
www 2831 0,0 0,0 97932 7660 - D 11:14AM 0:00,02
/usr/local/sbin/ 2831 vofflock - D 0:00,02 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd_ssl.conf -c PidFile /var/run/httpd.ssl.pid
www 3627 0,0 0,0 97932 7652 - D 11:16AM 0:00,02
/usr/local/sbin/ 3627 vofflock - D 0:00,02 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd_ssl.conf -c PidFile /var/run/httpd.ssl.pid
www 3634 0,0 0,0 97932 7612 - D 11:16AM 0:00,01
/usr/local/sbin/ 3634 vofflock - D 0:00,01 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd_ssl.conf -c PidFile /var/run/httpd.ssl.pid
www 3635 0,0 0,0 97932 7588 - D 11:16AM 0:00,00
/usr/local/sbin/ 3635 vofflock - D 0:00,00 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd_ssl.conf -c PidFile /var/run/httpd.ssl.pid
www 4912 0,0 0,3 158388 71048 - D 11:18AM 0:00,05
/usr/local/sbin/ 4912 suspfs - D 0:00,05 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd.conf -c PidFile /var/run/httpd.users.pid
www 4913 0,0 0,3 158388 70960 - D 11:18AM 0:00,05
/usr/local/sbin/ 4913 suspfs - D 0:00,05 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd.conf -c PidFile /var/run/httpd.users.pid
www 5258 0,0 0,3 158388 71228 - D 11:19AM 0:00,09
/usr/local/sbin/ 5258 suspfs - D 0:00,09 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd.conf -c PidFile /var/run/httpd.users.pid
www 5361 0,0 0,0 97932 7624 - D 11:19AM 0:00,01
/usr/local/sbin/ 5361 vofflock - D 0:00,01 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd_ssl.conf -c PidFile /var/run/httpd.ssl.pid
www 5362 0,0 0,0 97932 7624 - D 11:19AM 0:00,01
/usr/local/sbin/ 5362 vofflock - D 0:00,01 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd_ssl.conf -c PidFile /var/run/httpd.ssl.pid
www 5381 0,0 0,3 158388 70952 - D 11:19AM 0:00,03
/usr/local/sbin/ 5381 suspfs - D 0:00,03 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd.conf -c PidFile /var/run/httpd.users.pid
www 5382 0,0 0,3 158388 70944 - D 11:19AM 0:00,04
/usr/local/sbin/ 5382 suspfs - D 0:00,04 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd.conf -c PidFile /var/run/httpd.users.pid
latokar 5424 0,0 0,0 41736 3180 - Ds 11:19AM 0:01,55
ftpd: 31.129.249 5424 suspfs - Ds 0:01,55 ftpd: XXX.XXX.XXX.XXX:
user/latokar: STOR icons.php\r\n (ftpd)
www 5431 0,0 0,3 158388 70972 - D 11:19AM 0:00,02
/usr/local/sbin/ 5431 suspfs - D 0:00,02 /usr/local/sbin/httpd -f
/usr/local/etc/apache24/httpd.conf -c PidFile /var/run/httpd.users.pid
.....
procstat -kk 1395:
PID TID COMM TDNAME KSTACK
1395 102111 httpd - mi_switch+0xe1 sleepq_wait+0x3a
_sleep+0x287 vn_start_write_locked+0xa7 vn_start_write+0xa3 vn_write+0xb0
vn_io_fault_doio+0x22 vn_io_fault1+0x1ac vn_io_fault+0x18b dofilewrite+0x87
kern_writev+0x68 sys_write+0x63 amd64_syscall+0x40f Xfast_syscall+0xfb
procstat -kk 2273:
PID TID COMM TDNAME KSTACK
2273 100096 httpd - mi_switch+0xe1 sleepq_wait+0x3a
_sleep+0x287 foffset_lock+0xaa vn_io_fault+0x5c dofilewrite+0x87
kern_writev+0x68 sys_write+0x63 amd64_syscall+0x40f Xfast_syscall+0xfb
I don't know how to repeat. It occasionally happens at the different servers.
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