XPost: linux.debian.bugs.dist   
   From: ben@decadent.org.uk   
      
   On Sat, 2026-01-31 at 12:26 +0100, 10dmar10 wrote:   
   > Am 31.01.26 um 11:02 schrieb Salvatore Bonaccorso:   
   >  > Hi,   
   >  >   
   >  > On Sat, Jan 31, 2026 at 10:08:25AM +0100, 10dmar10 wrote:   
   [...]   
   >  >> while no longer used by default, XFS V4 support is still useful for   
   accessing   
   >  >> legacy XFS V4 file systems as long as kernel supports it.   
   >  >   
   >  > This is correct, the default was changed in upstream with f69260511c69   
   >  > ("xfs: disable deprecated features by default in Kconfig") and I   
   >  > believe we should follow that within the forky release cycle.   
   >  >   
   >  > Thus for forky I do not think we should diverge here from the default   
   >  > and re-enable deprecated features, but probably we should document it   
   >  > at least in the release notes so that people upgrading from trixie to   
   >  > forky are awaere that V4 filesystems will not be supported anymore.   
   >  >   
   >  > A NEWS entry in the packaging itself might be a good idea as well.   
   >  >   
   >  > Regards,   
   >  > Salvatore   
   >    
   > Hi,   
   >    
   > I wrote this bug report because I assumed the release interval for forky as   
   2027    
   > -2030, which is within the kernel removal date for XFS V4 feature in 2030.   
      
   Debian stable releases are supported for 5 years on the most popular   
   architectures.  So for forky this should be 2027-2032.   
      
   > Enabling CONFIG_XFS_SUPPORT_V4 would allow to continue running otherwise    
   > perfectly fine existing legacy XFS V4 filesystems without unnecessary   
   breaking    
   > anything within forky's release cycle...   
      
   Those filesystems must be quite old at this point, since v5 appears to   
   have been the default for new filesystems since xfsprogs 3.2.3 and   
   Debian 9 "stretch".  And they do need to be upgraded at some point due   
   to the upstream EOL (and later, Y2038).  How much would we gain by   
   putting it off another 2 years?   
      
   I agree with Salvatore that this just needs to be documented.   
      
   Ben.   
      
   --    
   Ben Hutchings   
   A free society is one where it is safe to be unpopular.   
                                                         - Adlai Stevenson   
      
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