Date: Wed, 2 Feb 2022 18:49:31 +1100 From: Peter Jeremy <peterj@freebsd.org> To: Warner Losh <imp@bsdimp.com> Cc: Konstantin Belousov <kostikbel@gmail.com>, FreeBSD FS <freebsd-fs@freebsd.org>, "freebsd-geom@FreeBSD.org" <freebsd-geom@freebsd.org> Subject: Re: bio re-ordering Message-ID: <Yfo3i9Yy/uCUpss1@server.rulingia.com> In-Reply-To: <CANCZdfoqQ3Ze%2BcMTsk_ho9x8hsSM9=fTavSao%2BUtwc2nSAEJpQ@mail.gmail.com> References: <YfTCs7j3TPZFcFCD@server.rulingia.com> <YfTEj1KLhQhoR3xP@kib.kiev.ua> <CANCZdfoqQ3Ze%2BcMTsk_ho9x8hsSM9=fTavSao%2BUtwc2nSAEJpQ@mail.gmail.com>
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--KgkkJ0JjAtxbHxnB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Thanks all for the very prompt responses. On 2022-Jan-28 22:32:02 -0700, Warner Losh <imp@bsdimp.com> wrote: >I think that ufs relies on two ordering primitives, both marked with >BIO_ORDERED today. >That's what most of the drivers key off of. We always set BIO_ORDERED on >all the BIO_FLUSH >events as far as I Can tell. Thanks for that warning. I don't think geom_gate understands either B_BARRIER or BIO_ORDERED. I shall have a closer look. >to it. b*barrierwrite() sets this, and that's used in the ffs_alloc code. In my case, I'm interested in ZFS, rather than UFS and it doesn't seem to set B_BARRIER or BIO_ORDERED or indirectly. --=20 Peter Jeremy --KgkkJ0JjAtxbHxnB Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEE7rKYbDBnHnTmXCJ+FqWXoOSiCzQFAmH6N4ZfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEVF QjI5ODZDMzA2NzFFNzRFNjVDMjI3RTE2QTU5N0EwRTRBMjBCMzQACgkQFqWXoOSi CzS/uw/+ONGwBq5/3KjIJZ+6rzyBja7Yb9EdfOdhrM9C6w4H84CpjWNZK56Aph6D SOMx3x299iAUG6vAehdl5pK91nkM/XBSpdb8JehMmIy1JU+3ydDwLcbaxOxW5Zwm lhqDZLTr6Q+Nsz6PmLMknswiG2tSfuqD3AB402OCHhZzMZaMcQJJ2Yc/vvVFMdMq CkTbWiYwQf33hqcofYHFswsT98p/KF5pG9phO6gHhFowNs8hZ+xwpk4wy24pwJVf 5Se+P6gFF+UzvqZYLtHmDpxnx4AsswZt3RSKhxdneM4n+dcbZl2+wOrlixB0Eq1m vsMIyJfS7a82cynkuwSLMYjxxxqvzRYHpOfc7KE7oGhCGJdYM/evEkrEi4iZBcvg QDRPjPoqeAtfrMdcAO4ev6wEPJwdtZc/fwGu9tfulWsp1Qf6ULMRnHElzitZNdcv vppOMoS9/PPv1EzhTvLD3BID6JTrWotevVeYpN8Tdr4we5HaUdqjjIyXp/dwpCfh XWq2brxr1slTKNHWfFGyg0ZUYsjazQTuC8x9VYFonW4tUPJvDwOG+R7uYuq2F39P Z02RRbhdP6SJsoCF5IkD1Kw1No+4YwVWoedFShaho0K33Ptknm/MBydRlcmzLVB8 KGLdRHKLIQq60C6L7AaQt1A4sPDYgpdPOS4VXvYpfIUcIJcXeDE= =vHiW -----END PGP SIGNATURE----- --KgkkJ0JjAtxbHxnB--
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