Date: Tue, 30 Jul 1996 13:11:44 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: hasty@rah.star-gate.com (Amancio Hasty) Cc: davidg@Root.COM, heo@cslsun10.sogang.ac.kr, freebsd-hackers@FreeBSD.org Subject: Re: your mail Message-ID: <199607302011.NAA00436@phaeton.artisoft.com> In-Reply-To: <199607191258.FAA00407@rah.star-gate.com> from "Amancio Hasty" at Jul 19, 96 05:58:14 am
next in thread | previous in thread | raw e-mail | index | archive | help
> From The Desk Of David Greenman : > > > 4) How can user process access the file in ufs filesystem through raw disk? > > > > You can't unless you write a user-mode UFS/FFS that does it's I/O through > > the raw device. I couldn't imagine why you'd want to do this, however. > > > > My guess is that his assumption is that accessing the files via a > "raw disk mode" will be faster than going thru the normal file > access mechanism. I wish I knew what is he up to so we can help him or > better yet his justification for taking such approach . You can more efficiently traverse a directory this way; specifically, you avoid the system call boundry push problem when you have blocks of crap file names that don't match the pattern you are looking for. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199607302011.NAA00436>