Re: Bugs and wishes in memory management area

Alan Cox (
Sat, 23 Nov 1996 02:08:06 +0000 (GMT)

> Linux-2 + Xserver + fvwm (95) + severall xterm + bash + xemacs + gcc +
> some application processes = more than 16 Mb.

Well let me suggest something

Linux-2.0 + Xserver -su -bs + original fvwm + rxvts + ash + joe in rxvt + lcc

Now tell me the problem is the kernel

> A serious ftp server or web server probably use more than 64 MB.

Web servers need little RAM. Current FTP servers need a lot because wu.ftpd
is a pile of crud when it comes to the word 'efficient'. I dunno if other
ftpds are better and useful. Troll ftpd is efficient but not quite right

> Now imagine a system with 128 MB of RAM and some controller(s) that use(s)
> ISA/DMA and:

If you can afford 128Mb of RAM you can afford PCI bus DMA

> Managing such situation may complexify the kernel too much.


> In this case, garbaging 1 MB of memory at startup for ISA/DMA need is
> probably a good solution.

Why waste memory ?