Bug 600247
Summary: | umount btrfs take long time after doing online add/remove device and even may cause kernel panic | ||||||
---|---|---|---|---|---|---|---|
Product: | Red Hat Enterprise Linux 6 | Reporter: | Eryu Guan <eguan> | ||||
Component: | kernel | Assignee: | Josef Bacik <jbacik> | ||||
Status: | CLOSED DUPLICATE | QA Contact: | Red Hat Kernel QE team <kernel-qe> | ||||
Severity: | medium | Docs Contact: | |||||
Priority: | medium | ||||||
Version: | 6.0 | CC: | esandeen | ||||
Target Milestone: | rc | ||||||
Target Release: | --- | ||||||
Hardware: | x86_64 | ||||||
OS: | Linux | ||||||
Whiteboard: | |||||||
Fixed In Version: | Doc Type: | Bug Fix | |||||
Doc Text: | Story Points: | --- | |||||
Clone Of: | Environment: | ||||||
Last Closed: | 2010-07-22 15:13:18 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: | |||||||
Bug Depends On: | |||||||
Bug Blocks: | 584197 | ||||||
Attachments: |
|
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux major release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Major release. This request is not yet committed for inclusion. Going to need to see the panic, but its likely because of ENOSPC. I'm going to backport the latest BTRFS stuff so that should fix this problem. This is fixed in -44 kernel, umount goes smoothly This issue has been proposed when we are only considering blocker issues in the current Red Hat Enterprise Linux release. It has been denied for the current Red Hat Enterprise Linux release. ** If you would still like this issue considered for the current release, ask your support representative to file as a blocker on your behalf. Otherwise ask that it be considered for the next Red Hat Enterprise Linux release. ** *** This bug has been marked as a duplicate of bug 593834 *** |
Created attachment 421174 [details] panic log on kernel 2.6.32-27.el6 Description of problem: After doing online add/remove device test on btrfs, umount btrfs partition takes long time to finish (about 3 minute), and even may cause kernel panic. There is no useful log when umount btrfs. I have only panic log on kernel 2.6.32-27 Version-Release number of selected component (if applicable): Kernel 2.6.32-33.el6.x86_64 btrfs-progs-0.19-10.el6.x86_64 How reproducible: umount takes long time: 100% kernel panic: less than 10% Steps to Reproduce: mkdir -p /mnt/btrfs dd if=/dev/null of=/home/img0 bs=1G seek=5 dd if=/dev/null of=/home/img1 bs=1G seek=3 dd if=/dev/null of=/home/img2 bs=1G seek=2 dd if=/dev/null of=/home/img3 bs=1G seek=1 for i in 0 1 2 3;do losetup /dev/loop$i /home/img$i;done # Create a filesystem across three drives mkfs.btrfs /dev/loop0 /dev/loop1 /dev/loop2 mkfs.btrfs /dev/loop3 btrfs-show mount /dev/loop0 /mnt/btrfs cp -a /etc /mnt/btrfs cat /mnt/btrfs/etc/fstab # Add a device btrfs-vol -a /dev/loop3 /mnt/btrfs btrfs-show cat /mnt/btrfs/etc/fstab # Remove a device btrfs-vol -r /dev/loop1 /mnt/btrfs btrfsck /dev/loop0 btrfs-show cat /mnt/btrfs/etc/fstab # Clean up umount /mnt/btrfs Actual results: umount takes about 3min to finish Expected results: umount returns within a reasonable time Additional info: