转自：http://blog.itpub.net/16978544/viewspace-696756/
在本机测试通过^^
抓哪个进程干坏事前要先停掉syslog
/etc/init.d/syslog stop
echo 1 > /proc/sys/vm/block_dump
dmesg | egrep "READ|WRITE|dirtied" | egrep -o '([a-zA-Z]*)' | sort | uniq -c | sort -rn | head
1423 kjournald
1075 pdflush
209 indexer
3 cronolog
1 rnald
1 mysqld
不要忘记在抓完之后关掉block_dump和启动syslog
echo 0 > /proc/sys/vm/block_dump
/etc/init.d/syslog start
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