On Jun 4, 2013, at 3:47, Steven Hartland <s...@freebsd.org> wrote: > Author: smh > Date: Tue Jun 4 10:47:44 2013 > New Revision: 251372 > URL: http://svnweb.freebsd.org/changeset/base/251372 > > Log: > Enhanced BIO_DELETE support for CAM SCSI to add ATA_TRIM support. > > Disable CAM BIO queue sorting for non-rotating media by default.
Using the elevator makes perfect sense even for random access devices when operations can be merged. Even SSDs have fixed, per-command overheads and merging writes may help prevent fragmentation. On drivers that support unmapped I/O, merging should be fairly cheap. It would be an interesting performance experiment. > -- Justin _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
