tar vfs memlimit?

[christian laubscher <christian laubscher tiscalinet ch>]

not meaning to annoy, just wishing to understand. ;-)

occasionally, i get a hint:
    Hint: Have you plenty of RAM/Virtual RAM? Set the tar VFS memlimit to -1.

the only place i see a memlimit is in vfs/vfs.h:
    extern int tar_gzipped_memlimit;
(otherwise unused - a relict?)

it is, according to changelog entries, not used any more - since 
december '98?

has anyone tried to use memlimit, recently?

thanks&ciao,
christian

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