msgbuf default size...

[Poul-Henning Kamp]

In message <20060828204908.GI37035 at funkthat.com>, John-Mark Gurney writes:

>I believe we should make the default 64k, and let other platforms,
>like arm, use DEFAULTS to change it to smaller values if necessary...

Better idea:

	if (ram <= 16MB)
		msgbuf_size = 8k
	else if (ram <= 64MB)
		msgbuf_size = 16k
	else if (ram <= 512MB)
		msgbuf_size = 32k
	else
		msgbuf_size = 64k


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