Re: Linux 5.3-rc8

[Willy Tarreau]

On Sun, Sep 15, 2019 at 09:05:41AM +0200, Lennart Poettering wrote:
> On So, 15.09.19 09:01, Willy Tarreau (w@xxxxxx) wrote:
> 
> > On Sun, Sep 15, 2019 at 08:56:55AM +0200, Lennart Poettering wrote:
> > > There's benefit in being able to wait until the pool is initialized
> > > before we update the random seed stored on disk with a new one,
> >
> > And what exactly makes you think that waiting with arms crossed not
> > doing anything else has any chance to make the situation change if
> > you already had no such entropy available when reaching that first
> > call, especially during early boot ?
> 
> That code can finish 5h after boot, it's entirely fine with this
> specific usecase.
> 
> Again: we don't delay "the boot" for this. We just delay "writing a
> new seed to disk" for this. And if that is 5h later, then that's
> totally fine, because in the meantime it's just one bg process more that
> hangs around waiting to do what it needs to do.

Didn't you say it could also happen when using encrypted swap ? If so
I suspect this could happen very early during boot, before any services
may be started ?

Willy