https://community.hpe.com/t5/operating-system-linux/freeing-unused-kernel-memory/m-p/4776142#M44146 You should install another kernel:<BR /><BR />With RHEL3 or RHEL4 and i386 architecture:<BR />* standard kernel supports 4 GB of physical memory<BR />* SMP kernel supports 16 GB of physical memory<BR />* hugemem kernel supports 64 GB of physical memory<BR /><BR /> Mon, 11 Apr 2011 21:10:53 GMT Ivan Ferreira 2011-04-11T21:10:53Z https://community.hpe.com/t5/operating-system-linux/freeing-unused-kernel-memory/m-p/4776141#M44145 Hallo,<BR />I install a Redhat Enterprise Linux ia64 on <BR />HP server Bl870c.<BR />The phisical Ram memory are 16 Go byte<BR />But after the installation linux read also 4 Go.<BR />And I get this error en dmesg :"check_crashkernel_memory: pbase = 100000000<BR />crashkernel: There would be kdump memory at 4 GB but this is unusable because it must<BR />be below 4 GB. Change the memory configuration of of the machine.<BR />Freeing initrd memory: 5984kB freed<BR />Total HugeTLB memory allocated, 0<BR />Freeing unused kernel memory: 464kB freed"<BR /><BR />How to change the configuration of the memory?<BR />Thanks<BR /> Mon, 11 Apr 2011 16:05:04 GMT https://community.hpe.com/t5/operating-system-linux/freeing-unused-kernel-memory/m-p/4776141#M44145 kuzo_1 2011-04-11T16:05:04Z https://community.hpe.com/t5/operating-system-linux/freeing-unused-kernel-memory/m-p/4776142#M44146 You should install another kernel:<BR /><BR />With RHEL3 or RHEL4 and i386 architecture:<BR />* standard kernel supports 4 GB of physical memory<BR />* SMP kernel supports 16 GB of physical memory<BR />* hugemem kernel supports 64 GB of physical memory<BR /><BR /> Mon, 11 Apr 2011 21:10:53 GMT https://community.hpe.com/t5/operating-system-linux/freeing-unused-kernel-memory/m-p/4776142#M44146 Ivan Ferreira 2011-04-11T21:10:53Z