On Thu, May 05, 2011 at 12:44:38PM -0400, T Johnson wrote:
I've been strapped for time to work on this lately, but have a
couple
updates. I have been using the updated RHEL 6.1 packages, so
unfortunately that doesn't seem to solve the problem yet.
I'm still having some trouble capturing all the output, but I have
manged to collect this verbose output after aborting a "stalled"
request:
[ 35.206396] end_request: I/O error, dev vda, sector 2048
[ 35.207363] Buffer I/O error on device vda1, logical block 0
[ 35.207384] lost page write due to I/O error on vda1
[ 35.207384] Buffer I/O error on device vda1, logical block 1
[ 35.207384] lost page write due to I/O error on vda1
[ 35.207384] end_request: I/O error, dev vda, sector 1574912
[ 35.207384] Buffer I/O error on device vda1, logical block 196608
[ 35.207384] lost page write due to I/O error on vda1
[ 35.207384] end_request: I/O error, dev vda, sector 1575624
[ 35.207384] Buffer I/O error on device vda1, logical block 196697
[ 35.207384] lost page write due to I/O error on vda1
check_for_daemon_cancellation_or_eof: 0x1786f80 g->state = 3, fd = 66
child_cleanup: 0x1786f80: child process died
I should probably note that this is being done over NFS mounted
images. I'm fairly sure there aren't NFS problems though, as the NFS
mounts are quite stable and otherwise seem to respond just fine
against the same mounts at the same time this problem occurs.
I'm hoping the above might trigger some ideas but I'm still working on
trying to figure out the lack of verbose data to stderr otherwise.
There seem to be a number of different things going on, but I really
don't have enough detail to be able to fix this. This error seems to
be unrelated to the Python issues you were having before.
The I/O errors above would be because the underlying disk is somehow
read-only to qemu.
For NFS I guess this could be because of root_squash-ing.
Rich.
--
Richard Jones, Virtualization Group, Red Hat
http://people.redhat.com/~rjones
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