Red Hat Bugzilla – Bug 172647
md rebuild very slow in kernel-smp-2.6.14-1.1649_FC5
Last modified: 2015-01-04 17:22:56 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8) Gecko/20051103 Fedora/1.5-0.5.0.rc1 Firefox/1.5 Description of problem: One of my RAID partitions was kicked out on reboot following a crash as "non-fresh". This happens quite a bit, sometimes even on normal restart which is annoying (but that's not the bug report). Generally I do /sbin/mdadm --manage -a /dev/md1 /dev/sdb2 To hot-add the partition back. Usually this is through in less than an hour (80G RAID-1 on two SATA disks, hdparm reports 50MB/s on the disks). Under 2.6.14-1.1649_FC5 after two hours the rebuild was only 10% complete. I gave up, rebooted to 2.6.13-1.1532_FC4 and the array rebuilt in 40 minutes. Hardware is a 3.0Ghz P4 with HT (smp kernels in both instances above). System was fully in sync with the "development" tree yesterday. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. 2. 3. Additional info:
A new kernel update has been released (Version: 2.6.18-1.2200.fc5) based upon a new upstream kernel release. Please retest against this new kernel, as a large number of patches go into each upstream release, possibly including changes that may address this problem. This bug has been placed in NEEDINFO state. Due to the large volume of inactive bugs in bugzilla, if this bug is still in this state in two weeks time, it will be closed. Should this bug still be relevant after this period, the reporter can reopen the bug at any time. Any other users on the Cc: list of this bug can request that the bug be reopened by adding a comment to the bug. In the last few updates, some users upgrading from FC4->FC5 have reported that installing a kernel update has left their systems unbootable. If you have been affected by this problem please check you only have one version of device-mapper & lvm2 installed. See bug 207474 for further details. If this bug is a problem preventing you from installing the release this version is filed against, please see bug 169613. If this bug has been fixed, but you are now experiencing a different problem, please file a separate bug for the new problem. Thank you.
Rebuild seems OK in 2.6.18-1.2798