On Sun, 2019-02-10 at 10:17 +0100, Mikael Pettersson wrote: > On Sat, Feb 9, 2019 at 7:19 PM James Bottomley > <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote: [...] > > I think the reason for this is that the block mq path doesn't feed > > the kernel entropy pool correctly, hence the need to install an > > entropy gatherer for systems that don't have other good random > > number sources. > > That does sound plausible, I admit I didn't even consider the > possibility that the old block I/O path also was an entropy source. In theory, the new one should be as well since the rotational entropy collector is on the SCSI completion path. I'd seen the same problem but had assumed it was something someone had done to our internal entropy pool and thus hadn't bisected it. James
