Re: [PATCH libvirt v1 0/3] Ensure full early console access with libvirt

On Thu, Sep 28, 2023 at 05:37 PM +0200, Marc Hartmayer <mhartmay(a)linux.ibm.com&gt; 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]

> > 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