Date: Tue, 18 Apr 2023 23:52:09 +0100 From: Jessica Clarke <jrtc27@freebsd.org> To: Warner Losh <imp@bsdimp.com> Cc: Warner Losh <imp@freebsd.org>, src-committers <src-committers@freebsd.org>, "<dev-commits-src-all@freebsd.org>" <dev-commits-src-all@freebsd.org>, "<dev-commits-src-main@freebsd.org>" <dev-commits-src-main@freebsd.org> Subject: Re: git: 238271f4a66b - main - stand: Add a snarky note about the upstream ZFS situation Message-ID: <B84E9112-427A-4B93-940A-A7734D00A3AB@freebsd.org> In-Reply-To: <CANCZdfry1T-xy-xQ19Cch42qmeNNAHFgQf_W61FCbSHWis_aNg@mail.gmail.com> References: <202304182131.33ILVSoG020217@gitrepo.freebsd.org> <C898F70B-7CA2-451F-A080-ADBFB472561D@freebsd.org> <CANCZdfry1T-xy-xQ19Cch42qmeNNAHFgQf_W61FCbSHWis_aNg@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 18 Apr 2023, at 23:49, Warner Losh <imp@bsdimp.com> wrote: >=20 >=20 >=20 > On Tue, Apr 18, 2023, 3:34 PM Jessica Clarke <jrtc27@freebsd.org> = wrote: >> On 18 Apr 2023, at 22:31, Warner Losh <imp@FreeBSD.org> wrote: >> >=20 >> > The branch main has been updated by imp: >> >=20 >> > URL: = https://cgit.FreeBSD.org/src/commit/?id=3D238271f4a66bd06b8b9a232a82f3ee08= 82e4cbb9 >> >=20 >> > commit 238271f4a66bd06b8b9a232a82f3ee0882e4cbb9 >> > Author: Warner Losh <imp@FreeBSD.org> >> > AuthorDate: 2023-04-18 21:29:45 +0000 >> > Commit: Warner Losh <imp@FreeBSD.org> >> > CommitDate: 2023-04-18 21:31:17 +0000 >> >=20 >> > stand: Add a snarky note about the upstream ZFS situation >> >=20 >> > The latest import of openzfs broke the hacks that we used to = omit the >> > special registers being used on arm64. Add snarky note = documenting this >> > situation since it's a mess now since the hack was only = partially >> > undone, leaving behind a mess. >> >=20 >> > Sponsored by: Netflix >> > --- >> > stand/libsa/zfs/Makefile.inc | 4 ++++ >> > 1 file changed, 4 insertions(+) >> >=20 >> > diff --git a/stand/libsa/zfs/Makefile.inc = b/stand/libsa/zfs/Makefile.inc >> > index f4cecdbc3085..7660f4ab7baf 100644 >> > --- a/stand/libsa/zfs/Makefile.inc >> > +++ b/stand/libsa/zfs/Makefile.inc >> > @@ -19,6 +19,7 @@ ZSTD_SRC+=3D zstd_common.c >> > ZSTD_SRC+=3D zstd_ddict.c zstd_decompress.c = zstd_decompress_block.c >> > ZSTD_SRC+=3D zstd_double_fast.c zstd_fast.c zstd_lazy.c = zstd_ldm.c >> >=20 >> > +# This is completely bogus: We should be able to omit this code = completely. >> > .if ${MACHINE_ARCH} =3D=3D "aarch64" >> > ZFS_SRC_AS =3D b3_aarch64_sse2.S b3_aarch64_sse41.S >> > .endif >> > @@ -90,10 +91,13 @@ CFLAGS.skein_block.c+=3D -DSKEIN_LOOP=3D111 >> >=20 >> > # To find blake3_impl.c in OpenZFS tree for our somehat ugly = blake3_impl_hack.c >> > # that's needed until the necessary tweaks can be upstreamed. >> > +# XXX the last import gutted all this since upstream changes broke = this hack. >> > CFLAGS.blake3_impl_hack.c+=3D -I${OZFS}/module/icp/algs/blake3 = -I${OZFS}/module/icp/include >> >=20 >> > CWARNFLAGS.zfs.c+=3D ${NO_WDANGLING_POINTER} >> >=20 >> > +# Needing to remove the -mgeneral-regs-only is a red flag that = this is not quite >> > +# right. But it's needed at the moment due to the muddled = upstream. >>=20 >> This one isn=E2=80=99t bogus? The file is deliberately using NEON so = needs >> access to floating-point registers, which LLVM (mostly) enforces for >> the assembler, unlike GNU as. >=20 > No. It's bogus because we should not be using it at all. The generic = implementation is fast enough for the boot loader and we have a blanket = policy against using extra register sets. The change wasn't discussed = before hand and what's really needed are upstream changes to be able to = omit it entirely. Oh I see, I misunderstood the point the comment was making. Thanks, Jess > > b3_aarch64_sse2.o: b3_aarch64_sse2.S > > ${CC} -c ${CFLAGS:N-mgeneral-regs-only} ${WERROR} ${.IMPSRC} \ > > -o ${.TARGET}
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?B84E9112-427A-4B93-940A-A7734D00A3AB>