From: carlavilla@freebsd.org   
      
   The FreeBSD community was saddened this month by the tragic death of   
   one of its most prolific contributors.  We learned that Hans Petter   
   Selasky passed away in a traffic accident in Lillesand, Norway on June   
   23, 2023 at the age of 41.  Hans was an incredibly brilliant and kind   
   person, and made many valuable contributions to FreeBSD.  He was   
   preceded in death by his father Gordon, and is survived by his mother,   
   Inger Elisabeth, his brothers Mark and Leif Conrad, and his nieces and   
   nephews Petra, David and Signe.   
      
   Hans began contributing to FreeBSD roughly 25 years ago, with fixes to   
   FreeBSD’s ISDN support.  He was a FreeBSD committer for nearly 15   
   years, and was best known for re-writing and maintaining the USB   
   stack.  Hans wrote the webcamd package which supports running Linux   
   webcam drivers in userspace on FreeBSD, and which enables those of us   
   using FreeBSD on the desktop to participate in modern   
   teleconferencing.  Most recently, he worked for Mellanox (now Nvidia)   
   to support their ConnectX series of high speed NICs on FreeBSD.   
   Hans’s work included major contributions to the kernel TLS framework,   
   as well as support for NIC kTLS send and receive offload in the mce(4)   
   driver, and many improvements to the Linux device driver compatibility   
   layer.   
      
   I first met Hans in 2015, in the context of his work on the mce(4)   
   driver for Mellanox NICs.  We worked together to make the mce(4)   
   driver one of highest performance NIC drivers in FreeBSD.  It was   
   during this time that I learned how brilliant Hans was.  He often had   
   ideas that sounded “crazy”, but which were actually brilliant.  One   
   example of this was his idea to sort incoming TCP packets using the   
   NIC provided RSS flow identifiers in order to present LRO with all   
   packets from the same TCP connection back to back.  This idea, which I   
   initially discounted as impractical, was crucial to Netflix being able   
   to meet our performance target of serving 100Gb/s of video traffic   
   from a single machine, and continues to save Netflix a large amount of   
   CPU resources.   
      
   Hans was a very kind and welcoming person.  The first time I attended   
   EuroBSDCon was in 2019 in Lillehammer, Norway where Hans insisted on   
   playing host to me.  Hans had driven across Norway from his home in   
   Grimstad to EuroBSDCon in Lillehammer with his father, and took me   
   around to see the Olympic ski jump, along with several other sites in   
   the town.  He then took me out to dinner, and back to the house he’d   
   rented with his father for an evening of great conversation.   
      
   Outside of FreeBSD, Hans’s hobbies included music and mathematics.  He   
   was active in his church, and contributed to its sound team.  He was a   
   loving and dedicated uncle to his nieces and nephews.  He loved   
   animals, especially his cat Pumba.   
      
   Even if you don’t use FreeBSD yourself, odds are good that Han’s work   
   touches on your daily life. For example, if you use a Playstation,   
   chances are you are using Hans’ USB stack.  If you watch Netflix, the   
   odds are good that the show you’re watching was delivered to you by a   
   ConnectX NIC running Hans’s mce(4) driver.   
      
   Hans, if you are reading this, know that you will be missed.   
      
   -- Drew Gallatin   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)