Bug 447667
| Summary: | Memory leak in kernel-2.6.25.3-18.fc9.x86_64 | ||||||||
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| Product: | [Fedora] Fedora | Reporter: | Gordon Messmer <gordon.messmer> | ||||||
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> | ||||||
| Status: | CLOSED WONTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||
| Severity: | medium | Docs Contact: | |||||||
| Priority: | low | ||||||||
| Version: | 9 | CC: | bobgus, kosaki.motohiro, nhorman | ||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | x86_64 | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2009-07-14 15:47:42 UTC | Type: | --- | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
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Description
Gordon Messmer
2008-05-21 02:35:10 UTC
Created attachment 306202 [details]
copy of /proc/meminfo made before reboot
Created attachment 306203 [details]
copy of /proc/slabinfo made before reboot
if you can reproduce this, do this .. $ free $ echo 3 > /proc/sys/vm/drop_caches $ free that should purge the dentry cache (and other caches). They should get reclaimed when something needs memory. This is the first report I've seen so far of anything suggesting the kernel is leaking slab objects, and something like a dentry leak would show up real quick. Out of curiosity: what will purging the caches tell us about the problem? I understand that cache items should be reclaimed when applications need memory. I noticed that nearly all of the "Slab" allocated is marked "SReclaimable". All the same, something caused Firefox to exit, and allocated a whole lot of slab in a short amount of time. I'd wonder if Firefox was at fault, but I'm not sure how it would cause the kernel to allocate a large amount of memory. I haven't seen the problem manifest again, yet, but I'm not certain what caused it in the first place. I don't know if this is related, but I updated to a new kernel (Fed8) and this kernel is unusable because of a memory leak. I have 3GB and it takes about 10-20 minutes to fill, then I need to reboot. I went back a kernel using the boot/grub.conf option. The kernel with a problem is 2.6.25.6-27.fc8 The kernel that runs ok is 2.6.25.4-10.fc8 I can provide additional information - let me know. hm, I have some guess. (yup it's just _guess_) 1. dentry cache is "name to i-node number transration" cache. Then many directory touched some command (e.g. find, updatedb) make bloat dentry cache easily. some system run updatedb at midnight by cron. do you do that? 2. SLUB on NUMA dramatically increase dcache fragmentation at special situation. (its problem already fixed on upstream (IIRC 2.6.27)). do you have a numa box? This message is a reminder that Fedora 9 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 9. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '9'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 9's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 9 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping Fedora 9 changed to end-of-life (EOL) status on 2009-07-10. Fedora 9 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed. |