Messages in this thread | | | Date | Sun, 25 Jan 2009 14:10:38 -0600 | From | Robert Hancock <> | Subject | Re: Memory not being reported |
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David Ronis wrote: > I don't think this is a 64bit capable box. Nonetheless, there are only > 4G of memory, not more, and I still see 3G of it.
Can you post your dmesg output from bootup?
> > David > > > > On Sat, 2009-01-24 at 02:37 -0600, Robert Hancock wrote: >> David Ronis wrote: >>> I'm running 2.6.28.1 on an i686 (slackware-12.1 for the most part) box. >>> I recently added some extra memory, expanding from 2Gb to 4. Everything >>> works as expected except that not all of the memory seems to be seen. >>> >>> free returns: >>> >>> total used free shared buffers >>> cached >>> Mem: 3374860 2099504 1275356 0 86612 >>> 1032024 >>> -/+ buffers/cache: 980868 2393992 >>> Swap: 497972 0 497972 >>> >>> >>> and cat /proc/meminfo gives: >>> >>> MemTotal: 3374860 kB >>> MemFree: 1199184 kB >>> Buffers: 86816 kB >>> Cached: 1036240 kB >>> SwapCached: 0 kB >>> Active: 1375864 kB >>> >>> etc. >>> >>> On the other hand, user-space tools like lshw show the 4 1Gb DIMMS as >>> does the BIOS configuration boot menu. >>> >>> One suspicion is that the configure option CONFIG_HIGHMEM4G=y >>> should be unset and the CONFIG_HIGHMEM64G should be. >> Yes, it should be. However, if your chipset doesn't support remapping >> memory above the 4GB mark (some don't, and this is needed in this case >> because various IO areas use up some of the address space below 4GB) >> then it won't be possible to make use of any of that RAM. >> >> Note that when running with more than 4GB of RAM it's generally >> preferable to run a 64-bit kernel if the machine supports it. >> >>> Any help would be appreciated, as would a separate CC since I don't >>> subscribe to the list. >>> >>> Thanks in advance >>> >>> David >>> >
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