Created attachment 317384 [details] Fix for workqueue leak Description of problem: When you remove a bond interface from the system, its workqueue thread is not cleaned up. Version-Release number of selected component (if applicable): kernel-2.6.18-92.1.10.el5 How reproducible: Every time. Steps to Reproduce: 1. modprobe bonding 2. echo "+bond0" > /sys/class/net/bonding_masters 3. echo "-bond0" > /sys/class/net/bonding_masters Actual results: # ps ax | grep bond0 9178 ? S< 0:00 [bond0] Expected results: No output from 'ps ax | grep bond0' Additional info: If you repeatedly do: # echo "+bond0" > /sys/class/net/bonding_masters # echo "-bond0" > /sys/class/net/bonding_masters you can accumulate hundreds of abandoned workqueue threads for bond0. The attached patch calls destroy_workqueue() during bond_deinit(). In my testing it solves the problem for kernel-2.6.18-92.1.10.el5. Note that this patch is against 2.6.26.5 (where the problem still exists) but the patch applies to the SRPM for kernel-2.6.18-92.1.10.el5. I have emailed the patch to fubar.com and bonding-devel.net for feedback and inclusion upstream.
Judging by the discussion here http://sourceforge.net/mailarchive/message.php?msg_name=1222103048.15657.6.camel%40sewt and the current code it looks fixed upstream, but the RHEL 5.3 beta looks to be using the 3.2.4 bonding release still.
This is something we know about, but I don't think will be resolved with 5.3. Several major bonding updates are planned for 5.4, so we will have to add it then.
Updating PM score.
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
in kernel-2.6.18-140.el5 You can download this test kernel from http://people.redhat.com/dzickus/el5 Please do NOT transition this bugzilla state to VERIFIED until our QE team has sent specific instructions indicating when to do so. However feel free to provide a comment indicating that this fix has been verified.
~~ Attention - RHEL 5.4 Beta Released! ~~ RHEL 5.4 Beta has been released! There should be a fix present in the Beta release that addresses this particular request. Please test and report back results here, at your earliest convenience. RHEL 5.4 General Availability release is just around the corner! If you encounter any issues while testing Beta, please describe the issues you have encountered and set the bug into NEED_INFO. If you encounter new issues, please clone this bug to open a new issue and request it be reviewed for inclusion in RHEL 5.4 or a later update, if it is not of urgent severity. Please do not flip the bug status to VERIFIED. Only post your verification results, and if available, update Verified field with the appropriate value. Questions can be posted to this bug or your customer or partner representative.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2009-1243.html