Mike, I have the following "note" from my investigations 4 years ago:
Note: When using hotplug memory, Linux consumes memory for hotplug memory
management. By default, the corresponding data structures are located in
the hotplug memory section with the lowest address range. Because of these
data structures, the lowest hotplug memory section cannot be released from
a running Linux instance. You may see:
# echo offline > /sys/devices/system/memory/memory4/state
-bash: echo: write error: Device or resource busy
Mike O'Reilly
IBM Linux Change Team
Michael
MacIsaac/Poughkee
psie/IBM@IBMUS To
Sent by: Linux on LINUX-390@vm.marist.edu,
390 Port cc
<linux-...@vm.mar
ist.edu> Subject
Dynamically removing memory - bug?
12/06/2013 05:30
PM
Please respond to
Linux on 390 Port
<linux-...@vm.mar
ist.edu>
Hello list,
This looks like a bug on a RHEL 6.3 system. I try to offline a chunk of
memory:
# cd /sys/devices/system/memory/memory2
# cat removable
1
# echo offline > state
-bash: echo: write error: Device or resource busy
Offlining three other chunks this way worked fine. Only this one won't go
offline. Has anyone seen this?
Thanks.
"Mike MacIsaac" <mikemac at-sign us.ibm.com>
----------------------------------------------------------------------
For LINUX-390 subscribe / signoff / archive access instructions,
send email to lists...@vm.marist.edu 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 lists...@vm.marist.edu 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/
<<inline: ecblank.gif>>
<<inline: graycol.gif>>
<<inline: pic51875.gif>>
