Re: git: fc90f3a28145 - main - ktrace: Increase precision of timestamps.

On Sat, Jul 16, 2022 at 09:50:02AM +0000, Dmitry Chagin wrote:
> The branch main has been updated by dchagin:
> 
> URL: https://cgit.FreeBSD.org/src/commit/?id=fc90f3a28145872afb7106d391bc922572eb2b71
> 
> commit fc90f3a28145872afb7106d391bc922572eb2b71
> Author:     Dmitry Chagin <dchagin@FreeBSD.org>
> AuthorDate: 2022-07-16 09:46:12 +0000
> Commit:     Dmitry Chagin <dchagin@FreeBSD.org>
> CommitDate: 2022-07-16 09:46:12 +0000
> 
>     ktrace: Increase precision of timestamps.
>     
>     Replace struct timeval in header with struct timespec.
>     To differentiate header formats, add a new KTR_VERSIONED flag
>     set in the header type field similar to the existing KTRDROP flag.
>     
>     To make it easier to extend ktrace headers in the future,
>     extend the existing header with a version field (version 0 is
>     reserved for older records without KTR_VERSIONED) as well as
>     new fields holding the thread ID and CPU ID.
It would be nice to have a way to force kernel to write v0 format.

For instance, one of my usual work flow case is to generate ktrace.out
on HEAD and kdump it on stable/13.