Re: [PATCH v2] qemu: add append mode config for serial file
On Tue, Jan 10, 2023 at 02:42:34PM +0600, Oleg Vasilev wrote:
Serial log file contains lots of useful information for debugging
configuration problems. It makes sense to preserve the log in between
restarts, so that one can later figure out what was going on. Before
that, we could do that on a per-domain basis, now we can configure it
once for all domains.
IMHO this is the job of the mgmt app that is using libvirt.
We've got a few places in qemu.conf that interact with the
guest config, but I largely consider them to be historical
mistakes that shouldn't be added to.
Adding this setting specifically for serial devs is opening
up a can of worms IMHO. eg what if you have multiple serial
ports and only want one of them in append mode. There are
many other devices with chardev backends which log to files,
but this setting only touches serial ports.
Ultimately append/truncate is a policy decision for the
mgmt app to make, not a libvirt host level tunable.
With regards,
Daniel
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