Description of problem: I'm following the test case here: https://fedoraproject.org/wiki/QA:Testcase_Virtualization_XenDomU_Block_attach In step 6, we use a script to generate a fake 5TB disk and then attach that to the F-11 domU. That part works fine, and inside the guest I could then partition the resulting disk using parted. However, trying to do mkfs.ext4 on that partition resulted in a hard-lockup of the domU. Unfortunately, I don't have much more information than that, and I'm not sure if this is a dom0 or domU bug. However, it should be easily reproducible. The domU kernel is 2.6.29.2-126.fc11.x86_64
verify-data --- http://people.redhat.com/sct/src/verify-data/ was written precisely to test read/write access to very large devices and files, and may be of help in debugging exactly where the IO goes wrong here.
When you say "hard lockup", do you mean nothing is working at all, or that usermode doesn't work? Does it respond to sysrq? I don't think #503840 is Xen-specific, but there's enough overlap (Xen+ext4) to be a bit worrying.
This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle. Changing version to '11'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
This message is a reminder that Fedora 11 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 11. It is Fedora's policy to close all bug reports from releases that are no longer maintained.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 '11'. 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 11'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 11 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 11 changed to end-of-life (EOL) status on 2010-06-25. Fedora 11 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.