Re: [PATCH v1] random: block in /dev/urandom

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On Wed, Mar 23, 2022 at 3:23 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
>
> On 3/23/22 05:10, Mark Brown wrote:
> > On Tue, Mar 22, 2022 at 02:54:20PM -0700, Guenter Roeck wrote:
> > Kind of academic given that Jason seems to have a handle on what the
> > issues are but for KernelCI it's variations on mach-virt, plus
> > versatile-pb.  There's a physical cubietruck as well, and BeagleBone
> > Blacks among others.  My best guess would be systems with low RAM are
> > somehow more prone to issues.
>
> I don't think it is entirely academic. versatile-pb fails for me;
> if it doesn't fail at KernelCI, I'd like to understand why - not to
> fix it in my test environment, but to make sure that I _don't_ fix it.
> After all, it _is_ a regression. Even if that regression is triggered
> by bad (for a given definition of "bad") userspace code, it is still
> a regression.

Maybe kernelci has a virtio-rng device assigned to the machine
and you don't? That would clearly avoid the issue here.

        Arnd



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