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bug#26952: 25.1; loops eating all memory while yanking big rectangle
From: |
Eli Zaretskii |
Subject: |
bug#26952: 25.1; loops eating all memory while yanking big rectangle |
Date: |
Sat, 20 May 2017 20:59:44 +0300 |
> From: npostavs@users.sourceforge.net
> Cc: 26952@debbugs.gnu.org, pot@gnu.org
> Date: Sat, 20 May 2017 13:41:36 -0400
>
> The following simple loop can trigger the issue (I'm now also limiting
> Emacs' memory usage to 1GB with "ulimit -Sv $((1000 * 1024))" so that it
> just throws an out of memory error instead of filling my swap and
> slowing everything down):
>
> (let ((str (make-string 150 ?a)))
> (dotimes (_ (* 600 1000))
> (insert str ?\n)))
>
> I think it might be just an inefficient allocater (or this pattern of
> allocation happens to hit a pathological case for the allocater). The
> master branch is using the 'hybrid' allocater, while emacs-25 is not.
> If I configure 25.2 with REL_ALLOC=yes, then it runs okay. The only
> allocation seems to be from 'enlarge_buffer_text'.
Thanks.
So you are saying that inserting 90MB worth of text into a buffer
makes Emacs 25.2 run out of 1GB of memory, due to inefficiencies of
the malloc implementation? (Here on Windows it produces a 230MB Emacs
session, but the Windows build uses the moral equivalent of mmap for
allocating buffer text.)
Maybe we should release Emacs 25.3 with this single problem fixed?
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, Francesco Potortì, 2017/05/16
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, npostavs, 2017/05/19
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, Eli Zaretskii, 2017/05/20
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, npostavs, 2017/05/20
- bug#26952: 25.1; loops eating all memory while yanking big rectangle,
Eli Zaretskii <=
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, npostavs, 2017/05/20
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, Eli Zaretskii, 2017/05/21
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, npostavs, 2017/05/21
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, Eli Zaretskii, 2017/05/21
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, npostavs, 2017/05/21
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, Paul Eggert, 2017/05/21
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, Eli Zaretskii, 2017/05/21
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, Paul Eggert, 2017/05/21
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, npostavs, 2017/05/21
- bug#26952: 25.1; loops eating all memory while yanking big rectangle, Paul Eggert, 2017/05/21