Messages in this thread | | | Date | Fri, 14 Dec 2012 15:30:44 -0500 | From | Joseph Salisbury <> | Subject | [v3.7 Regression] [SCSI] sd: Implement support for WRITE SAME |
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Hi Martin,
A bug was opened against the Ubuntu kernel[0]. After a kernel bisect, it was found that reverting the following commit resolved this bug:
commit 5db44863b6ebbb400c5e61d56ebe8f21ef48b1bd Author: Martin K. Petersen <martin.petersen@oracle.com> Date: Tue Sep 18 12:19:32 2012 -0400 [SCSI] sd: Implement support for WRITE SAME
The regression was introduced as of v3.7-rc7.
The bug can be reproduced with the following commands, which will operate on a virtual scsi_debug device, so they won't change any data on the test system. However, this will completely crash the system:
sudo modprobe scsi_debug sudo luksformat -t ext4 /dev/sdb <- Or whatever device gets assigned after inserting scsi_debug. sudo cryptsetup luksOpen /dev/sdb treasure
Everything works fine up to here, but the following will cause the crash:
sudo mount /dev/mapper/treasure /mnt
The bug can be reproduced on bare metal, in a VM and on i386 or amd64.
I see that you are the author of this patch, so I wanted to run this by you. I was thinking of requesting a revert for v3.7, but I wanted to get your feedback first.
Thanks,
Joe
[0] https://bugs.launchpad.net/bugs/1089818
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