In message <[EMAIL PROTECTED]>, Alan Cox writes: >Poul-Henning Kamp wrote:
>>> Essentially, neither madvise(..., MADV_DONTNEED) nor madvise(..., >>> MADV_FREE) >>> work. (Moreover, I don't believe that they have ever worked as intended.) >> >> I remember they did have a measurable but minor impact on performance >> in systems which paged a lot, back when they were introduced, sort >> of 1995-ish. But with the subsequent plunge in RAM prices they >> never saw much use. > >After more thorough digging through CVS history, I now believe that >MADV_DONTNEED worked properly between revision 1.70 (May 1996) and 1.76 >(June 1996) of vm/vm_object.c. :-) It's more difficult to say for >MADV_FREE. It may have been effective until 1999. Sounds quite probable. -- 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. _______________________________________________ cvs-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
