Path: csiph.com!goblin1!goblin.stu.neva.ru!usenet.stanford.edu!not-for-mail
From: jake <chen.liu.opensource@gmail.com>
Newsgroups: gnu.bash.bug
Subject: Memory continusely increase
Date: Tue, 18 Dec 2018 23:10:34 -0700 (MST)
Lines: 60
Approved: bug-bash@gnu.org
Message-ID: <mailman.5936.1545230749.1284.bug-bash@gnu.org>
NNTP-Posting-Host: lists.gnu.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Trace: usenet.stanford.edu 1545230750 26259 208.118.235.17 (19 Dec 2018 14:45:50 GMT)
X-Complaints-To: action@cs.stanford.edu
To: Bug-bash@gnu.org
Envelope-to: Bug-bash@gnu.org
X-detected-operating-system: by eggs.gnu.org: Mac OS X  [generic] [fuzzy]
X-Received-From: 162.253.133.57
X-Mailman-Approved-At: Wed, 19 Dec 2018 09:45:49 -0500
X-BeenThere: bug-bash@gnu.org
X-Mailman-Version: 2.1.21
Precedence: list
List-Id: Bug reports for the GNU Bourne Again SHell <bug-bash.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/bug-bash>, <mailto:bug-bash-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/bug-bash/>
List-Post: <mailto:bug-bash@gnu.org>
List-Help: <mailto:bug-bash-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/bug-bash>, <mailto:bug-bash-request@gnu.org?subject=subscribe>
Xref: csiph.com gnu.bash.bug:14925

Hi all,

I did a test about run a bash scriplt never quit,but met a memory usage
issue that cause used memory continuous increase.
This issue was present in bash-3.2.x, bash-4.0.x, bash-4.1.x, bash-4.2.x,
bash-4.3.x. However, This issue was disappeared in bash-4.4.0, I can't trace
which patch fixed the issue or which new feature was introduced in
bash-4.4.0.

Here is bash script:
------------------------------------------------------------------------------
#!/bin/bash

logger "Started testing"
while(true);do 
 while (true); do 
   ls > /dev/null 
 done
done
-------------------------------------------------------------------------------
root@localhost:/root> cat /proc/767/smaps |grep -A10 heap
01ba5000-01be8000 rw-p 00000000 00:00 0                                 
[heap]
Size:                268 kB
Rss:                 152 kB
Pss:                 152 kB
Shared_Clean:          0 kB
Shared_Dirty:          0 kB
Private_Clean:         0 kB
Private_Dirty:       152 kB
Referenced:          152 kB
Swap:                  0 kB
KernelPageSize:        4 kB
----------------------------------------------------------------------------------
root@localhost:/root> cat /proc/767/smaps |grep -A10 heap
00d4c000-00e55000 rw-p 00000000 00:00 0                                 
[heap]
Size:               1060 kB
Rss:                1048 kB
Pss:                1048 kB
Shared_Clean:          0 kB
Shared_Dirty:          0 kB
Private_Clean:         0 kB
Private_Dirty:      1048 kB
Referenced:         1048 kB
Swap:                  0 kB
KernelPageSize:        4 kB
----------------------------------------------------------------------------------
Could someone help to tell me which part of changes in bash-4.4.0, that
would be give me a direction backport code changes from bash-4.4 to
bash-3.2.x and bash-4.3.x.

Thanks,
Chen.



--
Sent from: http://gnu-bash.2382.n7.nabble.com/