using mfs of size > 64Mb and system stability
Arne Wörner
arne_woerner at yahoo.com
Fri Jan 7 01:43:49 PST 2005
--- Barath S <barath_yes at yahoo.com.sg> wrote:
> My intention is create a file system in memory of size
> > 128Mb and use that for my application. But, I
> couldn't do that as my system hangs whenever I create
> a mfs of size > 64Mb. I did the following...
>
> a) Configured memory file system of size 128Mb using
> 'mdmfs' command with 'malloc' option. When I tried to
> copy files to this mfs, m/c hanged after copying some
> files.
> b) Then I rebooted by m/c and configured memory file
> system of size 64Mb and this time the copying
> operation was successful
> c) I observed that the system hanged whenever I
> configure a mfs of size > 64Mb and used that mfs
>
> a) Can someone provide me hints on what could be the
> problem ?
>
I use R5.3. According to the man page mdconfig(8) a md of type
malloc should use "-o reserve", if it is large and to be "filled"
(I think the man page means "filled quickly"):
"If the -o reserve option is not set, creating and filling
a large malloc-backed memory disk is a very easy way to
panic a system."
Maybe that helps?
Did you try type "swap"?
-Arne
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