Derek,
I have a running system wich is exactly what you describe : BGP router with full routing table running LEAF to eliminate the hard disk. It has been happily running with 512MB for about 2 years now. Regards, Cedric 2006/8/9, derek <[EMAIL PROTECTED]>: > > Eric, > > Thanks for that, I will download a fresh copy of the current release and > give it a try :) > > BTW - I think 2Gb is probably a bit OTT for my requirement but I > wouldn't want a BGP box to fail for the sake of a bit of memory. > > Best regards, > Derek > > > Eric Spakman wrote: > > Hi Derek, > > > > A simple recompile of the kernel with the higmem option enabled should > be > > enough. Using the buildtool environment for it is the most convenient > > option (you don't have to apply the kernel patches by hand in that > case). > > > > Very interesting case by the way! > > > > Eric > > > > > > > > > >> Eric, > >> > >> > >> Thanks for the prompt reply. > >> > >> > >> I understand the reason - in this case I was looking at running BGP > with > >> a full set of internet routes ( about 400,000 at the last count), and I > >> dont want the system to have any chance of running out of memory. I > have a > >> "Redhat" type system currently doing the job and seems to be using > >> 1.3Gb memory. > >> > >> > >> The only reason for using a Leaf distro is to get rid of the HDD as a > >> point of failure. > >> > >> What would be involved in getting a kernel with this limit lifted? > >> > >> > >> Regards, > >> Derek > >> > >> > >> Eric Spakman wrote: > >> > >> > >>> Hi Derek, > >>> > >>> > >>> > >>> > >>>> I have leaf Bering uclib running on a box with 2Gb memory but it only > >>>> show 1Gb in /proc/meminfo > >>>> > >>>> Is possibly a limit in Leaf or have is it likely I have a hardware > >>>> problem? > >>>> > >>>> > >>>> > >>> It's because the kernel is compiled with "CONFIG_NOHIGHMEM=y" in the > >>> kernel config. Bering-uClibc is an embedded distro, using 2G of memory > >>> is really overkill. > >>> > >>> From the kernel documentation: > >>> > >>> > >>> "CONFIG_NOHIGHMEM > >>> Linux can use up to 64 Gigabytes of physical memory on x86 systems. > >>> However, the address space of 32-bit x86 processors is only 4 > Gigabytes > >>> large. That means that, if you have a large amount of physical memory, > >>> not all of it can be "permanently mapped" by the kernel. The physical > >>> memory that's not permanently mapped is called "high memory". > >>> > >>> If you are compiling a kernel which will never run on a machine with > >>> more than 960 megabytes of total physical RAM, answer "off" here > >>> (default > >>> choice and suitable for most users). This will result in a "3GB/1GB" > >>> split: 3GB are mapped so that each process sees a 3GB virtual memory > >>> space and the remaining part of the 4GB virtual memory space is used > by > >>> the kernel to permanently map as much physical memory as possible. > >>> > >>> If the machine has between 1 and 4 Gigabytes physical RAM, then answer > >>> "4GB" here. > >>> > >>> > >>> If more than 4 Gigabytes is used then answer "64GB" here. This > >>> selection turns Intel PAE (Physical Address Extension) mode on. PAE > >>> implements 3-level paging on IA32 processors. PAE is fully supported > by > >>> Linux, PAE > >>> mode is implemented on all recent Intel processors (Pentium Pro and > >>> better). NOTE: If you say "64GB" here, then the kernel will not boot > on > >>> CPUs that don't support PAE! > >>> > >>> > >>> The actual amount of total physical memory will either be auto > detected > >>> or can be forced by using a kernel command line option such as > >>> "mem=256M". > >>> (Try "man bootparam" or see the documentation of your boot loader > (grub, > >>> lilo or loadlin) about how to pass options to the kernel at boot > >>> time.) > >>> > >>> If unsure, say "off". > >>> " > >>> > >>> > >>> Eric > >>> > >>> > >>> > >>> > >>>> TIA > >>>> > >>>> > >>>> > >>>> Derek > >>>> > >>>> > >>>> > >>>> --------------------------------------------------------------------- > >>>> ---- > >>>> Using Tomcat but need to do more? Need to support web services, > >>>> security? Get stuff done quickly with pre-integrated technology to > >>>> make your job easier Download IBM WebSphere Application Server > v.1.0.1 > >>>> based on Apache Geronimo > >>>> > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=1216 > >>>> 42 > >>>> > ---------------------------------------------------------------------- > >>>> -- > >>>> leaf-user mailing list: leaf-user@lists.sourceforge.net > >>>> https://lists.sourceforge.net/lists/listinfo/leaf-user > >>>> Support Request -- http://leaf-project.org/ > >>>> > >>>> > >>>> > >>>> > >>>> > >>> > >>> > >> > ------------------------------------------------------------------------- > >> Using Tomcat but need to do more? Need to support web services, > >> security? Get stuff done quickly with pre-integrated technology to make > >> your job easier Download IBM WebSphere Application Server v.1.0.1 based > on > >> Apache Geronimo > >> > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > >> > ------------------------------------------------------------------------ > >> leaf-user mailing list: leaf-user@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/leaf-user > >> Support Request -- http://leaf-project.org/ > >> > >> > >> > > > > > > > > > ------------------------------------------------------------------------- > > Using Tomcat but need to do more? Need to support web services, > security? > > Get stuff done quickly with pre-integrated technology to make your job > easier > > Download IBM WebSphere Application Server v.1.0.1 based on Apache > Geronimo > > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > > ------------------------------------------------------------------------ > > leaf-user mailing list: leaf-user@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/leaf-user > > Support Request -- http://leaf-project.org/ > > > > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job > easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > ------------------------------------------------------------------------ > leaf-user mailing list: leaf-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/leaf-user > Support Request -- http://leaf-project.org/ > ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ------------------------------------------------------------------------ leaf-user mailing list: leaf-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/leaf-user Support Request -- http://leaf-project.org/
