In message <[EMAIL PROTECTED]>, Nate Lawson wri tes: >On Sat, 14 Dec 2002, Michael Ranner wrote: >> Hi there! >> >> I have implemented the setattr(), lsetattr() and fsetattr() syscalls for >> 4.7 and 5.0. You can review my code on http://www.ranner.jawa.at/freebsd.php. >> >> Comments and suggestions are welcome. > >I don't mean to be rude but I doubt the utility of this whole >plan. dump/restore are done on disk devices which are at least an order >of magnitude slower than a syscall boundary crossing. Going from 4 >syscalls to 1 can't make a bit of difference in restore(8) performance.
You are wrong about restore: restore is done on a mounted filesystem. >So why is this faster? Something is likely slowing namei() down. Because 1 syscall and 2 namei calls are faster than 4 syscalls and four namei calls. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
