Re: 2.1.111 VM and low memory machines

Albert D. Cahalan (
Mon, 27 Jul 1998 01:41:00 -0400 (EDT)

Alan Cox writes:

> I've been NFS destruction testing 2.1.111 and compared to
> 2.1.109 its much better.
> In comparison I could reliably kill 16Mb machines under attack
> with 2.1.109 and 4K NFS even, with 8Mb boxes they tended to die
> over time during the build and 4Mb hardly got into make dep.

Except for some broken old Ethernet cards, your data seems to
indicate that the default NFS block size should vary with the
total amount of memory.

4 MB --> 1 kB
8 MB --> 2 kB
16 MB --> 4 kB
32 MB --> 8 kB

There is a TCP/IP window size CONFIG_* option that might deserve
similar treatment.

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