Bug 1027600
| Summary: | [RFE][rmmod] if module is in used, rmmod output the dependences | |||
|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | JianHong Yin <jiyin> | |
| Component: | kmod | Assignee: | Václav Pavlín <vpavlin> | |
| Status: | CLOSED CANTFIX | QA Contact: | Red Hat Kernel QE team <kernel-qe> | |
| Severity: | medium | Docs Contact: | ||
| Priority: | unspecified | |||
| Version: | 7.0 | CC: | jwboyer | |
| Target Milestone: | rc | Keywords: | FutureFeature | |
| Target Release: | --- | |||
| Hardware: | All | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | Doc Type: | Enhancement | ||
| Doc Text: | Story Points: | --- | ||
| Clone Of: | ||||
| : | 1027601 (view as bug list) | Environment: | ||
| Last Closed: | 2013-12-16 15:15:40 UTC | Type: | Bug | |
| Regression: | --- | Mount Type: | --- | |
| Documentation: | --- | CRM: | ||
| Verified Versions: | Category: | --- | ||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | ||
| Cloudforms Team: | --- | Target Upstream Version: | ||
| Embargoed: | ||||
| Bug Depends On: | ||||
| Bug Blocks: | 1027601 | |||
I am afraid this is not possible. As rmmod can only get the idea whether the module is used or not from refcnt (/sys/module/nfsd/refcnt), which is set by kernel, I don't see any option how to get the information what is actually using the module. CC'ing Josh Boyer for his opinion. I agree with Václav. The only things rmmod/modprobe have to look at are the refcnt and the module dependency list (holders). If a module has its refcnt incremented by something other than another module, there is no simple way for rmmod/modprobe -r to determine that. So closing as CANTFIX. |
Description of problem: When we want rmmod the nfsd, the rmmod just tell me module "is in use". But not tell me who use it. [root@dhcp12-144 ~]# rmmod nfsd rmmod: ERROR: Module nfsd is in use <<<--- NOT GOOD [root@dhcp12-144 ~]# rmmod auth_rpcgss rmmod: ERROR: Module auth_rpcgss is in use by: nfsd <<<--- GOOD And my buddy cost more than half an hours to find why can not rmmod, Finally we find it used by /proc/fs/nfsd. Could rmmod output the dependences, if the dependences is not module name? Version-Release number of selected component (if applicable): all version in RHEL{5,6,7} How reproducible: 100% Steps to Reproduce: 1. rmmod nfsd 2. 3. Actual results: [root@dhcp12-144 ~]# rmmod nfsd rmmod: ERROR: Module nfsd is in use Expected results: [root@dhcp12-144 ~]# rmmod nfsd rmmod: ERROR: Module nfsd is in use "by: /proc/fs/nfsd" OR like follow (if difficult to get): rmmod: ERROR: Module nfsd is in use "by: nil(maybe used by special filesystem)" Additional info: