Re: FYI: posix_fallocate, stable/15, releng15.0, and a gcc* cc1plus: some reported issues

On Fri, Feb 6, 2026 at 7:57 PM Mark Millard <[email protected]> wrote:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123366#c27
>
> reports that for FreeBSD 15:
>
> ) posix_fallocate can and does return EOPNOTSUPP, at least with zfs involved
ZFS will never know how to do this, as I understand it. (Some hint it
may be possible
someday, if the reservation system in ZFS is improved.)

>
> ) the posix_fallocate man page does not document EOPNOTSUPP (not MFC'd?
> not in a stable/15 that I checked as well)
Yea, I suppose this should be in the man page.
Any volunteers for a man page patch?

rick

>
> ) there is at least 1 gcc* for which its cc1plus can apparently get
> SIGSEGV as a consequence
>
> --
> ===
> Mark Millard
> marklmi at yahoo.com
>
>