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Re: zsh and memory

X-seq: zsh-workers 9089
From: Timothy Writer <tim@xxxxxxxxxxx>
To: Sven Wischnowsky <wischnow@xxxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: zsh and memory
Date: 16 Dec 1999 13:01:02 -0500
Cc: zsh-workers@xxxxxxxxxxxxxx
In-reply-to: Sven Wischnowsky's message of "Thu, 16 Dec 1999 11:39:48 +0100 (MET)"
Mailing-list: contact zsh-workers-help@xxxxxxxxxxxxxx; run by ezmlm
References: <199912161039.LAA13865@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Sender: tim@xxxxxxxxxx

Sven Wischnowsky <wischnow@xxxxxxxxxxxxxxxxxxxxxxx> writes:

> I wrote:
> 
> > I'm really tempted to allocate heaps using mmap()
> > (anonymous) to get them out of the way of the zalloc() allocator. I
> > small test showed that with this I only get 39KB of free memory after
> > the completion test, which is really not too bad. I don't have a patch 
> > for that yet, though.
> 
> ... and now I don't think I'll ever write one: neither Solaris nor
> Linux seem to have MAP_ANONYMOUS. Sniff.

Hmmm ... how are you calling mmap exactly?  I've definitely used
MAP_ANONYMOUS on Linux (as far back as kernel 1.3) and I think I've used it
on Solaris too.  Linux doesn't have shared anonymous mappings, i.e. you have
to use MAP_PRIVATE with MAP_ANONYMOUS.

-- 
tim writer <tim@xxxxxxxxxxx>                                  starnix inc.
tollfree: 1-87-pro-linux                         brampton, ontario, canada
http://www.starnix.com              professional linux services & products

References:
- Re: zsh and memory
  - From: Sven Wischnowsky

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