Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.
Bug 114140 - ipcs -lm reports incorrect max total shared memory (shmall)
ipcs -lm reports incorrect max total shared memory (shmall)
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: util-linux (Show other bugs)
i686 Linux
medium Severity medium
: ---
: ---
Assigned To: Elliot Lee
Ben Levenson
Depends On:
  Show dependency treegraph
Reported: 2004-01-22 19:18 EST by Joachim Hirche
Modified: 2007-11-30 17:07 EST (History)
0 users

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2004-02-24 11:14:19 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

  None (edit)
Description Joachim Hirche 2004-01-22 19:18:23 EST
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET 
CLR 1.1.4322)

Description of problem:
Set sysv ipc parm shmall 536870912 (512MB) via sysctl or 
echo 536870912 > /proc/sys/kernel/shmall

cat /proc/sys/kernel/shmall reports 536870912 (correct),
but ipcs -lm reports
    ------ Shared Memory Limits --------
    max number of segments = 4096
    max seg size (kbytes) = 262144
    max total shared memory (kbytes) = 2147483648
    min seg size (bytes) = 1

which is a tad high at 2 TB.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. echo 536870912 > /proc/sys/kernel/shmall
2. cat /proc/sys/kernel/shmall
3. ipcs -lm
4. check line with "max total shared memory (kbytes) ="

Actual Results:  max total shared memory (kbytes) = 2147483648

Expected Results:  max total shared memory (kbytes) = 536870912

Additional info:

checked RHL 9 - same problem exists in util-linux-2.11y-9
Comment 1 Elliot Lee 2004-02-24 11:14:19 EST
The /proc/sys/kernel/shmall setting is in number of memory pages - on
ia32 systems, that is 4K. The present ipcs behaviour is correct.

Note You need to log in before you can comment on or make changes to this bug.