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author | Christian Borntraeger <borntraeger@de.ibm.com> | 2011-12-29 13:47:43 +0100 |
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committer | Amit Shah <amit.shah@redhat.com> | 2011-12-30 11:10:10 +0530 |
commit | ed8e5a85a1741147ce06932b478a509ce3407061 (patch) | |
tree | 3d558ff8830d891e8214a7b1103e62ee263bb605 /hw/qxl-logger.c | |
parent | 8d3bc5178fbc06cdd89c064ae8f44e77c503e91e (diff) |
virtio-console: Fix failure on unconnected pty
when I tried qemu with -virtio-console pty the guest hangs and attaching
on /dev/pts/<x> does not return anything if the attachment is too late.
This results in pty_chr_write() returning 0, which causes the port to
get throttled. This results in the guest getting frozen as the
guest->host virtio_console writes don't return until the host releases
the vq element back to the guest.
For the virtio-serial use case we don't want to lose data but for the
console case we better drop data instead of "killing" the guest
console. If we get chardev->frontend notification and a better behaving
virtio-console we can revert this fix.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Diffstat (limited to 'hw/qxl-logger.c')
0 files changed, 0 insertions, 0 deletions