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Re: When should ralloc.c be used?

From: Stefan Monnier
Subject: Re: When should ralloc.c be used?
Date: Mon, 24 Oct 2016 10:12:27 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2.50 (gnu/linux)

>> But I fail to see what's hard about changing that to "rel_alloc=no,
>> mmap=yes".
> Why do we need mmap at all?  Why not just use malloc (as implemented
> by gmalloc)?

AFAIU the reason we use ralloc is because of memory fragmentation, and
mmap brings similar benefits.  Maybe we don't need either of them, but
at least at some point in the past the fragmentation issue was
sufficient to convince people to write that code.


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