On Wed, Nov 7, 2018 at 1:20 PM Poul-Henning Kamp <p...@phk.freebsd.dk> wrote:
> -------- > In message < > canczdfrk-7vbetkhfq9kkm4usrvjvh8ws_ozjidmh5336dt...@mail.gmail.com> > , Warner Losh writes: > > >BIO_FLUSH is primarily done to force ordering points, > > Originally BIO_FLUSH was defined the way it is, to make it possible > to flush an isolated specified range on providers which support that > so that fsync(2) could be implemented that way. > > I can't remember the exact semantics of the two "magic" flush > operations (off=0,len=0) and (off=end,len=0) but they were different > from each other in some important aspect (Pawel?) > I couldn't find any place where the different types of flush are differentiated (nothing in CAM for sure), though I suppose I could have missed something. All the CAM drivers just use it to push data to the device and don't look at the flags. Warner _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
