Opened 12 years ago
Closed 4 years ago
#10227 closed defect (obsolete)
Unaligned AIO/DIO with ext4
| Reported by: | melchiaros | Owned by: | |
|---|---|---|---|
| Component: | other | Version: | |
| Keywords: | Cc: | ||
| Guest type: | Linux | Host type: | Linux |
Description
I find from time to time on different linux host the kernel entry:
Feb 8 12:31:52 userhost kernel: [ 1822.712781] warning: `VirtualBox' uses 32-bit capabilities (legacy support in use) Feb 8 12:32:26 userhost kernel: [ 1856.921623] EXT4-fs (sda1): Unaligned AIO/DIO on inode 1179650 by VirtualBox; performance will be poor.
Actual it is on Ubuntu11.10 (kernel3.0.17)with VirtualBox4.1.8. I test it there for backporting repositories, so a statement from you would be fine.
Also actual I am using a debian 64bit(sid) guest that has caused this, but it is not limited to debian guests.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/926747
I attach the log of the guest.
Attachments (1)
Change History (5)
by , 12 years ago
| Attachment: | debian6 64bit-2012-02-08-12-47-27.log added |
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comment:1 by , 12 years ago
comment:2 by , 12 years ago
| Summary: | virtualbox conflicting with ext4 → Unaligned AIO/DIO with ext4 |
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This is not a conflict but just a performance warning that certain buffers should have a more suitable alignment.
comment:3 by , 12 years ago
Nobody cares? I would like to know why VBox uses unaligned buffers and why or just fix it.
comment:4 by , 4 years ago
| Resolution: | → obsolete |
|---|---|
| Status: | new → closed |
Have just seen that in this case two messages come together that I have some days ago seen on different places in the kern.log:
Please have also:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/926751
in mind.