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

    From Rick Macklem@rick.macklem@gmail.com to muc.lists.freebsd.stable on Sat Feb 7 14:28:08 2026
    From Newsgroup: muc.lists.freebsd.stable

    On Fri, Feb 6, 2026 at 7:57rC>PM Mark Millard <marklmi@yahoo.com> 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


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  • From Mark Millard@marklmi@yahoo.com to muc.lists.freebsd.stable on Fri Feb 6 19:57:07 2026
    From Newsgroup: muc.lists.freebsd.stable

    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

    ) the posix_fallocate man page does not document EOPNOTSUPP (not MFC'd?
    not in a stable/15 that I checked as well)

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



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    Please direct questions, flames, donations, etc. to news-admin@muc.de
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