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  1. Jun 09, 2019
    • Dr. Matthias St. Pierre's avatar
      Revert the DEVRANDOM_WAIT feature · ad416c80
      Dr. Matthias St. Pierre authored
      
      
      The DEVRANDOM_WAIT feature added a select() call to wait for the
      `/dev/random` device to become readable before reading from the
      `/dev/urandom` device. It was introduced in commit 38023b87f037
      in order to mitigate the fact that the `/dev/urandom` device
      does not block until the initial seeding of the kernel CSPRNG
      has completed, contrary to the behaviour of the `getrandom()`
      system call.
      
      It turned out that this change had negative side effects on
      performance which were not acceptable. After some discussion it
      was decided to revert this feature and leave it up to the OS
      resp. the platform maintainer to ensure a proper initialization
      during early boot time.
      
      Fixes #9078
      
      This partially reverts commit 38023b87f037.
      
      Reviewed-by: default avatarTim Hudson <tjh@openssl.org>
      Reviewed-by: default avatarViktor Dukhovni <viktor@openssl.org>
      
      (cherry picked from commit a08714e18131b1998faa0113e5bd4024044654ac)
      
      (Merged from https://github.com/openssl/openssl/pull/9118)
      ad416c80
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