From: Thorsten Glaser <t.glaser@tarent.de>
To: musl@lists.openwall.com
Subject: Re: Removing sbrk and brk
Date: Tue, 7 Jan 2014 09:43:26 +0000 (UTC) [thread overview]
Message-ID: <loom.20140107T104008-769@post.gmane.org> (raw)
In-Reply-To: <20140106224036.GC24286@brightrain.aerifal.cx>
Rich Felker <dalias <at> aerifal.cx> writes:
> This seems to be optional behavior; using guard pages with all
> allocations would blow up memory usage several thousand times and
No, they aren’t accessible, so the kernel (should) never maps them
to any real RAM.
> limit the number of allocations possible on 32-bit systems to well
> under one million -- yielding an unusable system.
FSVO unusable. The default datasize ulimit on OpenBSD/i386 2.x/3.x
was 128 MiB, with the maximum having been 1 GiB (now 1.5 GiB, I
believ), anyway, so there is enough space for that. (In general,
they heavily use this – randomisation and guard pages.)
But this is getting even more OT.
> > But I’m just a downstream of omalloc. I really suggest to talk to
> > Otto Moerbeek, who, in contrast to most OpenBSD developers, is
> > pleasant to talk with and approachable.
>
> Might be interesting
Mmhm. I must admit I had hoped to be able to pick some fruit from
that since you do bring up things I’d not have thought of. But np.
> but pretty off-topic. Using the OpenBSD malloc
> in musl is not something that's really on the table.
OK. I was just suggesting this in case it would have been something
you could have / wanted to use, and had not thought of already.
That’s it from me on the malloc thread.
bye,
//mirabilos
next prev parent reply other threads:[~2014-01-07 9:43 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-21 23:40 Rich Felker
2013-12-22 2:15 ` Luca Barbato
2013-12-22 17:58 ` Richard Pennington
2013-12-22 18:21 ` Luca Barbato
2013-12-22 18:48 ` Szabolcs Nagy
2013-12-22 21:55 ` Christian Neukirchen
2013-12-23 4:46 ` Rich Felker
2014-01-02 22:03 ` Rich Felker
2014-01-03 11:51 ` Thorsten Glaser
2014-01-03 12:59 ` Daniel Cegiełka
2014-01-03 17:33 ` Rich Felker
2014-01-03 18:19 ` Rich Felker
2014-01-03 19:03 ` Rich Felker
2014-01-06 14:51 ` Thorsten Glaser
2014-01-06 22:40 ` Rich Felker
2014-01-07 9:43 ` Thorsten Glaser [this message]
2014-01-07 16:06 ` Rich Felker
2014-01-07 22:00 ` Rich Felker
2014-02-21 16:03 ` Daniel Cegiełka
2014-02-21 16:36 ` Szabolcs Nagy
2014-02-21 16:47 ` Daniel Cegiełka
2014-02-21 17:09 ` Rich Felker
2014-02-21 22:34 ` Daniel Cegiełka
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