On Thu Apr 7 11, Garrett Cooper wrote: > On Thu, Apr 7, 2011 at 12:03 PM, Alexander Best <arun...@freebsd.org> wrote: > > On Thu Apr 7 11, Alexander Motin wrote: > >> Author: mav > >> Date: Thu Apr 7 08:17:53 2011 > >> New Revision: 220412 > >> URL: http://svn.freebsd.org/changeset/base/220412 > >> > >> Log: > >> Make ada(4) driver to control device write cache, same as ata(4) does. > >> Add kern.cam.ada.write_cache sysctl/tunable to control it alike > >> hw.ata.wc. > > > > how hard would it be to support per device sysctls/tunables? i'd really > > like to > > do: > > > > kern.cam.ada.0.write_cache=0 (root fs) > > kern.cam.ada.1.write_cache=1 (/usr, /var, etc.) > > Does it really make sense to turn on write caching for one drive and > not the other(s)?
i think so. for "/" i want maximum safebelts. so i'd like to disable the write cache and mount it with the "sync" option. for /usr/ and all the other mount points i'd like maximum speed with write caching enabled and mounted with the "noasync" and "noatime" options. cheers. alex > Thanks, > -Garrett -- a13x _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
