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Linux 7.4 Slated To Land The AVX-512 Optimized xor_gen For A Big Performance Win

Over the past few months there have been patches floating around for an AVX-512 optimized xor_gen() for the Linux kernel for that functuon used by the Linux software RAID code. It's been shhowing very nice performance gains with this function being used for generating and validating parity blocks such as for RAID5 and RAID6. The upcoming Linux 7.4 cycle is slated to merge this nice enhancement…

We haven't written up this one. Phoronix has the full story — the link below goes straight to it.

Read the original at phoronix.com →

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Generators are All You Need

If you've been in development long enough, you know that one of the hardest parts of coding is building on top of existing code.

Destructive Identity Operations Explained: Login-Method Removal and Full User Deletion

Short answer: treat login-method removal as a recoverable credential change, but treat full user deletion as an irreversible, observable workflow that revokes every session before personal data is…

  • Login-method removal ensures removed authenticator can't start sessions
  • Full deletion prevents existing sessions from authorizing requests
  • Both operations have distinct postconditions and threat models

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