Red Hat Bugzilla – Bug 824705
Mounting and umounting frequently exhausts LowFree
Last modified: 2014-06-02 09:06:52 EDT
Description of problem:
Mounting and umounting a partition frequently(e.g., autofs) will decrease the LowFree of memory, and it won't go up. When the value of LowFree is very small, oom-killer will be triggered, and then other progresses will be killed.
Version-Release number of selected component (if applicable):
mount (util-linux 2.13-pre7)
Steps to Reproduce:
watch 'cat /proc/meminfo | grep LowFree'
I use default timeout(5min) of autofs, it will be reproduced in 51 days.
I tried the way below, and it will reproduced in several hours.
while [ true ]; do
mount /dev/sdb1 /mnt
Lowfree reduced to 8M, other progresses are killed by oom-killer.
Lowfree decreased while mounting,but it should go up after umounting.
This bug/component is not included in scope for RHEL-5.11.0 which is the last RHEL5 minor release. This Bugzilla will soon be CLOSED as WONTFIX (at the end of RHEL5.11 development phase (Apr 22, 2014)). Please contact your account manager or support representative in case you need to escalate this bug.
Thank you for submitting this request for inclusion in Red Hat Enterprise Linux 5. We've carefully evaluated the request, but are unable to include it in RHEL5 stream. If the issue is critical for your business, please provide additional business justification through the appropriate support channels (https://access.redhat.com/site/support).