From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Eli Zaretskii <eliz@gnu.org>
Cc: schwab@linux-m68k.org, rms@gnu.org, 11519@debbugs.gnu.org,
lekktu@gmail.com
Subject: bug#11519: "Wrong type argument: characterp" building custom-deps while boostrapping
Date: Sun, 27 May 2012 22:15:00 -0400 [thread overview]
Message-ID: <jwvsjelunhu.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <83wr41wnu1.fsf@gnu.org> (Eli Zaretskii's message of "Thu, 24 May 2012 19:22:46 +0300")
> I didn't mean STRING_CHAR_*. I agree that they should be fixed not to
> have such unexpected side effect. They should be read-only operations.
> As a temporary band-aid for Emacs 24.1, I suggest the change below.
Looks fine (should make the regex.c patch unnecessary).
> You said "malloc", so I took an issue with the MS C runtime
> implementation of malloc. Since all the other implementations suffer
> from fragmentation, there's no reason to believe that the MS
> implementation avoids that danger.
The problem is inherent to the malloc API, pretty much, yes.
> We could easily turn off buffer relocation in ralloc.c for good, by
> fixing the value of use_relocatable_buffers at zero. But I'm worried
> that this would cause Emacs on Windows run out of memory (or act as if
> it were) faster.
AFAIK, Emacs under GNU/Linux and Mac OS X uses non-relocatable buffers,
and they don't seem to suffer more from fragmentation problems than
Emacs under Windows. But yes, unless we use an mmap-style allocation,
it would use more actual memory.
> For example, in an Emacs session that runs for 2
> weeks and has a 200MB working set, I just visited a 1.3GB file, went
> to its middle and typed "C-u 30000 d" to insert 30K characters. Emacs
For sure editing such large file in a 32bit address space might prove
problematic without relocation, (and even with buffer relocation, some
non-buffer allocation might end up fragmenting the address space too
much) but luckily few people do that (you need to compile
with --wide-int to be able to do that).
> Yet another alternative is to emulate mmap on Windows using the
> equivalent Windows API. But that requires a research comparing mmap
> features we need and use on Posix platforms with the features offered
> by Windows, to make sure this is at all feasible.
That would be nice.
> Such a research
> would need to be done by someone who knows enough about mmap and is
> willing to do the job. Do we have such a person on board?
I don't volunteer.
Stefan
next prev parent reply other threads:[~2012-05-28 2:15 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-19 16:10 bug#11519: "Wrong type argument: characterp" building custom-deps while boostrapping Juanma Barranquero
2012-05-19 16:27 ` Eli Zaretskii
2012-05-19 21:40 ` Juanma Barranquero
2012-05-20 17:27 ` Eli Zaretskii
2012-05-20 19:00 ` Juanma Barranquero
2012-05-21 1:50 ` Stefan Monnier
2012-05-21 2:51 ` Eli Zaretskii
2012-05-21 7:59 ` Andreas Schwab
2012-05-21 17:51 ` Eli Zaretskii
2012-05-21 20:39 ` Stefan Monnier
2012-05-22 19:00 ` Eli Zaretskii
2012-05-22 19:19 ` Stefan Monnier
2012-05-22 19:47 ` Eli Zaretskii
2012-05-23 0:47 ` Stefan Monnier
2012-05-23 2:59 ` Eli Zaretskii
2012-05-23 14:16 ` Stefan Monnier
2012-05-23 15:23 ` Ken Brown
2012-05-23 16:52 ` Eli Zaretskii
2012-05-23 20:07 ` Stefan Monnier
2012-05-24 16:22 ` Eli Zaretskii
2012-05-28 2:15 ` Stefan Monnier [this message]
2012-05-28 16:53 ` Eli Zaretskii
2012-05-28 19:44 ` Stefan Monnier
2012-05-28 20:47 ` Eli Zaretskii
2012-05-29 1:23 ` Stefan Monnier
2012-05-29 16:02 ` Eli Zaretskii
2012-06-02 20:44 ` Juanma Barranquero
2012-06-03 4:18 ` Eli Zaretskii
2013-12-28 8:41 ` Glenn Morris
2013-12-28 9:48 ` Eli Zaretskii
2012-05-23 17:34 ` Eli Zaretskii
2012-05-23 14:10 ` Kenichi Handa
2012-05-23 15:27 ` Stefan Monnier
2012-05-23 17:02 ` Eli Zaretskii
2012-05-22 14:38 ` Kenichi Handa
2012-05-22 19:02 ` Eli Zaretskii
2012-05-21 1:49 ` Stefan Monnier
2012-05-21 2:50 ` Eli Zaretskii
2012-05-21 3:21 ` Stefan Monnier
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=jwvsjelunhu.fsf-monnier+emacs@gnu.org \
--to=monnier@iro.umontreal.ca \
--cc=11519@debbugs.gnu.org \
--cc=eliz@gnu.org \
--cc=lekktu@gmail.com \
--cc=rms@gnu.org \
--cc=schwab@linux-m68k.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.