char devices without SI_UNMAPPED?

[Warner Losh]

On Sun, Dec 13, 2020 at 11:18 AM Ian Lepore <ian at freebsd.org> wrote:

> On Sun, 2020-12-13 at 10:27 -0700, alan somers wrote:
> > I'm trying to exercise the aio code that handles character devices
> > that
> > don't set the SI_UNMAPPED flag.  But I can't find any.  Are there any
> > remaining character devices that don't allow unmapped I/O?
> >
> > -Alan
> >
>
> I assume you mean disk-like devices?  Probably mmcsd, flash/at45d,
> flash/mx25l.
>

There are times that it's disabled administratively as well, but that may
be on a per-I/O basis.
vfs.zfs.vol.unmap_enabled: 1
vfs.unmapped_buf_allowed: 1

"Why do you ask?" is the next question...

Warner