Re: Repo on https://github.com/NetBSD/src vastly diverged on commits

Hello!

On 7/26/26 9:33 PM, Jan-Benedict Glaw wrote:
...
> Seems a system broke and I guess the import/conversion is being
> restarted. Miniscule changes may have resulted in different commit
> hashes. In general, I guess the GitHub repo is safe to use---once it's
> really up to data again.

I was still curious when commits started diverging and found that it 
happened in 1993/08/28 with different CVS Header - in recent case file 
is identified as deleted (in Attic), while originally it was present 
(diff is from git show --format=raw commit-id):

===
--- first-commit-origin.patch   2026-07-29 20:42:03.752563468 +0200
+++ first-commit-trunk.patch    2026-07-29 20:41:45.660129949 +0200
@@ -1,5 +1,5 @@
-commit 896cdcbe99f37dd2508d4d1cfcd8039fbe9bd346
-tree 59ec1c8b1ecfdbb286b6bf9beced3cbfe0e6e728
+commit a2133ea2684ccd25eebf21abbdd08664746dbb6b
+tree 3ea9f7e7320344d46392b574cc5ecd669ac2d6a9
  parent 468c5f5158e536db031fc7c89bcfc2a4e0006ab0
  author glass <[email protected]> 746552116 +0000
  committer glass <[email protected]> 746552116 +0000
@@ -1844,7 +1844,7 @@

   struct obmem_cf_loc {
  diff --git a/sys/arch/sun3/sun3/pmap.c b/sys/arch/sun3/sun3/pmap.c
-index 283241da8e8d..b5a421e6f673 100644
+index 283241da8e8d..43ef3cbbb6c7 100644
  --- a/sys/arch/sun3/sun3/pmap.c
  +++ b/sys/arch/sun3/sun3/pmap.c
  @@ -1,3 +1,35 @@
@@ -1878,7 +1878,7 @@
  + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  + * SUCH DAMAGE.
  + *
-+ * $Header: /cvsroot/src/sys/arch/sun3/sun3/Attic/pmap.c,v 1.13 
1993/08/28 15:38:05 glass Exp $
++ * $Header: /cvsroot/src/sys/arch/sun3/sun3/pmap.c,v 1.13 1993/08/28 
15:38:05 glass Exp $
  + */
   #include "systm.h"
   #include "param.h"
===

Older commits starting from:

===
commit e81d63576b2e46ab90da7d75fa155ea57ee4d32e
Author: srcmastr <srcmastr>
Date:   Mon Jul 13 16:18:24 1992 +0000

     initial empty check-in

===

are perfectly matching (identical hashes).

However I have no clue what exactly happened on that file in 1993/08/28 
15:38:05 that in one case it is deleted and in second not...

Best regards
   --Henryk Paluch