Finding a Kernel Function That Caused the D Process StateIf there are too many processes in the D state and you can't find out what is happening, issue the following command: # objdump -Dr /boot/vmlinux-`uname -r` >/tmp/kernel.dump and then get the process list: # ps axfwln F UID PID PPID PRI NI VSZ RSS WCHAN STAT TTY TIME COMMAND 100 0 20418 20417 17 0 2588 684 - R ? 0:00 ps axfwln 100 0 1 0 8 0 1388 524 145186 S ? 0:00 init 040 0 8670 1 9 0 1448 960 145186 S ? 0:00 syslogd -m 0 040 0 8713 1 10 0 1616 1140 11ea02 S ? 0:00 crond
Look for a number under the
WCHAN
column for the process in question. Then, open
"c011e910 <sys_nanosleep>:" Then you can tell if the process “lives” or is blocked into the found function. |
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