On 05/23/2010 05:07 PM, Antoine Martin wrote:
On 05/23/2010 06:57 PM, Avi Kivity wrote:
On 05/23/2010 11:53 AM, Antoine Martin wrote:
I'm not: 64-bit host and 64-bit guest.
Just to be sure, I've tested that patch and still no joy:
/dev/vdc: read failed after 0 of 512 at 0: Input/output error
/dev/vdc: read failed after 0 of 512 at 0: Input/output error
/dev/vdc: read failed after 0 of 2048 at 0: Input/output error
pread is still broken on this big raw disk.
Can you summarize your environment and reproducer again? The thread
is so long it is difficult to understand exactly what you are testing.
Sure thing:
Description of the problem:
A guest tries to mount a large raw partition (1.5TB /dev/sda9 in my
case), this fails with pread enabled, works with it disabled.
Did you mean: preadv?
What has been tested:
Host has had 2.6.31.x and now 2.6.34 - with no improvement.
Guest has had numerous kernel versions and patches applied for testing
(from 2.6.31.x to 2.6.34) - none made any difference. (although the
recent patch stopped the large partition from getting corrupted by the
merged requests bug.. yay!)
It was once thought that glibc needed to be rebuilt against newer
kernel headers, done that too, and rebuilt qemu-kvm afterwards. (was
2.6.28 then 2.6.31 and now 2.6.33)
What has been reported: straces, kernel error messages as above.
Here is the qemu command line (sanitized - removed the virtual disks
which work fine and network config):
qemu -clock dynticks -m 256 -L ./ -kernel ./bzImage-2.6.34-aio -append
"root=/dev/vda" -nographic -drive file=/dev/sda9,if=virtio,cache=none
Let me know if you need any other details. I can also arrange ssh
access to the system if needed.
And: 64-bit host kernel, 64-bit host userspace, yes?
Does aio=native help? How about if=ide?
--
error compiling committee.c: too many arguments to function
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