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List:       qemu-devel
Subject:    [Qemu-devel] [Bug 1811758] Re: virtio-rng backend should use getentropy() syscall when available
From:       Amit Shah <amitshah () gmx ! net>
Date:       2019-04-17 16:54:59
Message-ID: 155552009996.6733.14700622083184838543.malone () chaenomeles ! canonical ! com
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Yes, using getrandom() in qemu by default on systems that support it
will be an improvement, and is the right approach.

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https://bugs.launchpad.net/bugs/1811758

Title:
  virtio-rng backend should use getentropy() syscall when available

Status in QEMU:
  New

Bug description:
  According to https://wiki.qemu.org/Features/VirtIORNG the default
  backend for `virtio-rng-pci` is `/dev/random`.  Alternately, the user
  can point it to a different backend file, like `/dev/urandom`.

  However, both of these files have suboptimal behavior in one way or
  another, as documented in `random(7)`.  Instead, the default behavior
  should be to pull the requested octets from the `getrandom()` system
  call, if available, called with no flags set.

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