Hello,
Just found that rev r308040 had introduced regression bug for watchdogd:
if watchdogd start by default (without parameters), it use 100% CPU:
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
14954 root 1 -52 r0 7524K 3496K CPU2 2 0:44 100.36%
watchdogd
# truss -afd -p 14954
...
14954: 1.640554819 ioctl(4,WDIOCPATPAT,0xffffea60) = 0 (0x0)
14954: 1.640608166 stat("/etc",{ mode=drwxr-xr-x
,inode=21,size=109,blksize=7168 }) = 0 (0x0)
14954: 1.642456843 ioctl(4,WDIOCPATPAT,0xffffea60) = 0 (0x0)
14954: 1.642511284 stat("/etc",{ mode=drwxr-xr-x
,inode=21,size=109,blksize=7168 }) = 0 (0x0)
14954: 1.643971019 ioctl(4,WDIOCPATPAT,0xffffea60) = 0 (0x0)
14954: 1.644008391 stat("/etc",{ mode=drwxr-xr-x
,inode=21,size=109,blksize=7168 }) = 0 (0x0)
14954: 1.645305166 ioctl(4,WDIOCPATPAT,0xffffea60) = 0 (0x0)
14954: 1.645329823 stat("/etc",{ mode=drwxr-xr-x
,inode=21,size=109,blksize=7168 }) = 0 (0x0)
14954: 1.646621223 ioctl(4,WDIOCPATPAT,0xffffea60) = 0 (0x0)
14954: 1.646645072 stat("/etc",{ mode=drwxr-xr-x
,inode=21,size=109,blksize=7168 }) = 0 (0x0)
14954: 1.647935561 ioctl(4,WDIOCPATPAT,0xffffea60) = 0 (0x0)
Root cause - uninitialized variable timeout_sec
https://svnweb.freebsd.org/base/head/usr.sbin/watchdogd/watchdogd.c?revision=308040&view=markup#l82
static u_int timeout_sec;
and changes, introduced in r308040:
774 if (nap > timeout_sec / 2)
775 nap = timeout_sec / 2;
Workaround: specify the desired timeout period in seconds:
watchdogd_enable="YES"
watchdogd_flags="-t 128”
Thank you!
--
Alex Deiter
alex.dei...@gmail.com
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