On Wed, Oct 11, 2023 at 10:05 AM +0200, "Marc Hartmayer" <mhartmay@linux.ibm.com> wrote:
On Thu, Sep 28, 2023 at 05:37 PM +0200, Marc Hartmayer <mhartmay@linux.ibm.com> wrote:
Currently, early console output may be lost, e.g. if starting a guest with `virsh start --console` guest, which can make debugging of early failures very difficult (like zipl messages or disabled wait conditions happening early). This is because QEMU may emit serial console output before the libvirt console client starts to consume data from the pts. This can be prevented by starting the guest in paused state, connect to the console and then resume the guest.
Note: There is still a problem in QEMU itself, see QEMU patch series `[PATCH] chardev/char-pty: Avoid losing bytes when the other side just (re-)connected` [1]
This patch is now accepted upstream.
Changelog: RFCv1->v1: + rebased on current master + worked in comments from Daniel
[1] https://lists.gnu.org/archive/html/qemu-devel/2023-08/msg02725.html
Marc Hartmayer (3): virsh: add `console --resume` support Improve `virsh start --console` behavior Improve `virsh create --console` behavior
tools/virsh-console.c | 8 ++++ tools/virsh-console.h | 1 + tools/virsh-domain.c | 94 ++++++++++++++++++++++++++++++++----------- 3 files changed, 80 insertions(+), 23 deletions(-)
base-commit: dd403f8873cf8de7675b89ed757a4228af7bc05e -- 2.34.1
Polite ping and adding Daniel to CC - sry I missed that in the beginning.
-- Kind regards / Beste Grüße Marc Hartmayer
IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Gregor Pillen Geschäftsführung: David Faller Sitz der Gesellschaft: Böblingen Registergericht: Amtsgericht Stuttgart, HRB 243294
Very friendly ping. -- Kind regards / Beste Grüße Marc Hartmayer IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Gregor Pillen Geschäftsführung: David Faller Sitz der Gesellschaft: Böblingen Registergericht: Amtsgericht Stuttgart, HRB 243294