Perhaps double check if /bin/echo is a link to /usr/bin/echo on your system, in which case try updating your sudoers line to point to /usr/bin/echo instead of /bin/echo ?
Tom Anderson Ex ignorantia ad sapientiam e tenebris ad lucem! > On Jul 9, 2015, at 8:51 AM, Michael MacIsaac <[email protected]> wrote: > > Tomas, > >> I forgot to answer this question: you can drop buffers and cache by > running >> echo 3 > /proc/sys/vm/drop_caches > > Nice, even easier. Thanks! > > The next question is - can this ever be done by a non-root user? I tried > adding /bin/echo to /etc/sudoers, but still get an error: > > mike@lab153:~ $ sudo /bin/echo 3 > /proc/sys/vm/drop_caches > -bash: /proc/sys/vm/drop_caches: Permission denied > > > > -Mike > > On Thu, Jul 9, 2015 at 11:36 AM, Pavelka, Tomas <[email protected]> > wrote: > >>> Thanks. I copied and pasted cmmflush and it seems to work nicely >> >> If I understand it right then you have to look at how cmmflush affects the >> output of /proc/buddyinfo. If you see non-zero in the last order of slab >> (i.e. the one with 1MB size) then you are good to run vmcp --buffer=1M. >> Otherwise you may still run into problems even if free -m shows a lot of >> free memory. >> >> But I have not tried cmmflush, maybe it will help. >> >> The way that I was able to reproduce the memory fragmentation problem was >> by copying large amount of data over SCP to that Linux machine. Try that >> and see if you can reproduce the vmcp --buffer=1M failure. >> >> Tomas >> > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
