From: Stefan Monnier <monnier@IRO.UMontreal.CA>
To: Ken Brown <kbrown@cornell.edu>
Cc: Eli Zaretskii <eliz@gnu.org>, emacs-devel@gnu.org
Subject: Re: New emacs maintainer for cygwin
Date: Wed, 20 May 2009 11:22:15 -0400 [thread overview]
Message-ID: <jwvzld7er9b.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <4A136D6F.20903@cornell.edu> (Ken Brown's message of "Tue, 19 May 2009 22:39:43 -0400")
> Could you elaborate on this? I don't know anything about USE_LSB_TAG. All
grep for USE_LSB_TAG in src/lisp.h. It's quite likely that Cygwin uses
it already (ideally, all systems should use it). What it does is it
makes Emacs use the lower 3bits for tags rather than the higher 3bits.
The advantage being that ELisp pointers can reach any part of the memory
rather than only the lower 512MB. The downside is that all objects need
to be aligned on an 8byte boundary, and on some systems it's difficult
to get this guarantee.
Stefan
next prev parent reply other threads:[~2009-05-20 15:22 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-15 13:41 New emacs maintainer for cygwin Ken Brown
2009-05-15 14:16 ` Eli Zaretskii
2009-05-15 14:35 ` Ken Brown
2009-05-15 14:42 ` Lennart Borgman
2009-05-15 14:55 ` Chong Yidong
2009-05-17 4:01 ` Stefan Monnier
2009-05-20 0:21 ` Ken Brown
2009-05-20 2:14 ` Stefan Monnier
2009-05-20 2:39 ` Ken Brown
2009-05-20 15:22 ` Stefan Monnier [this message]
2009-05-20 17:37 ` Ken Brown
-- strict thread matches above, loose matches on Subject: below --
2009-05-20 8:05 Angelo Graziosi
2009-05-20 12:30 ` Ken Brown
2009-05-20 12:46 ` Angelo Graziosi
2009-05-20 22:19 Angelo Graziosi
2009-05-20 22:39 ` Ken Brown
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