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Re: C-h f now permanently loads ~2MB

From: Stefan Monnier
Subject: Re: C-h f now permanently loads ~2MB
Date: 29 Apr 2004 10:50:10 -0400
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3.50

>> Try the -DUSE_LSB_TAG compile-flag ;-)
> [That message didn't get here.]
>> Would that really change anything?
> What is it, anyway?

It's a flag that causes the 3 tag bits of every Lisp_Object to be places at
the lowest 3 bits rather than the highest ones.  It assumes that malloc
returns multiple-of-8 addresses and thus allows the full address space to
be used for Lisp data.

>> I suspect there is a memory leak, and that my Emacs dies long before
>> it would really fill its entire address space.
> The Boehm GC give you some tools to trace memory allocation and
> pointers keeping data live when they shouldn't, but I don't know how
> easy they are is to use.

Sounds very interesting.


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