Re: lost memory on a 4GB amd64

[Andrew Walrond <andrew@walrond.org>]

On Monday 20 Sep 2004 11:26, Sergei Haller wrote:
>
> fang ~sergei> ./memtest 1000000000
> allocate 1000000000: ok
>
> Message from syslogd@fang at Mon Sep 20 18:03:16 2004 ...
> fang kernel: Oops: 0000 [1] PREEMPT SMP
>

Works fine on my 4Gb Tyan thunder K8W machine, even running from an xterm:
andrew@orac ~ $ uname -a
Linux orac.walrond.org 2.6.8.1 #3 SMP Sun Aug 29 17:36:49 BST 2004 x86_64 
unknown unknown GNU/Linux

andrew@orac ~ $ free -m
             total       used       free     shared    buffers     cached
Mem:          4008        263       3744          0          0         66
-/+ buffers/cache:        195       3812
Swap:         3827         25       3802

andrew@orac ~ $ ./memtest 1000000000
allocate 1000000000: ok
set them to 0... done
andrew@orac ~ $ ./memtest 4000000000
allocate 4000000000: ok
set them to 0... done
andrew@orac ~ $ ./memtest 5000000000
allocate 5000000000: ok
set them to 0... done
andrew@orac ~ $

The last one took a while (using 1Gb swap) but it still worked fine.

Without swap:

andrew@orac ~ $ sudo swapoff -a
andrew@orac ~ $ free -m
             total       used       free     shared    buffers     cached
Mem:          4008        237       3770          0          1         54
-/+ buffers/cache:        181       3826
Swap:            0          0          0
andrew@orac ~ $ ./memtest 1000000000
allocate 1000000000: ok
set them to 0... done
andrew@orac ~ $ ./memtest 2000000000
allocate 2000000000: ok
set them to 0... done
andrew@orac ~ $                          

Still fine.

Andrew Walrond