At Fri, 3 Apr 2020 15:15:36 +0200, Martin Husemann wrote: > > [*] On my alpha (500MHz), wss(4)/ISA works even on blk_ms=1. > > But I was not able to set 1msec on yds(4) PCI sound card on > > the same machine. Its lower limit was 5msec (due to driver's > > or hardware's restriction, I don't know details though). > > Should we allow the driver to set a lower minimum for this?
(sorry if I misunderstood your text.) I don't think so. Each driver/hardware may have their specific restrictions. Some driver/hardware may be able to set at 1msec but others may not. It's nature. And this is also why we should not be eager to reduce default blk_ms. > Then all m68k and vax drivers could just request (say) 100ms and we are > done? I don't think so. It breaks MI/MD separation (though the most drivers on m68k/vax are port-specific). It's better to handle separately "how long default blk_ms is better?" and "blocksize driver/hardware supports". Thanks, --- Tetsuya Isaki <is...@pastel-flower.jp / is...@netbsd.org>
