Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4

A minute ago I said:

 AFAIK Opensolaris doesn't implement posix_fadvise() so there's no benefit. It
 would be great to hear if you could catch the ear of the right people to get
 an implementation committed. Depending on how the i/o scheduler system is
 written it might not even be hard -- the Linux implementation of WILLNEED is
 all of 20 lines.

I noticed after sending it that that's slightly unfair. The 20-line function
calls another function (which calls another function) to do the real readahead
work. That function (mm/readahead.c:__do_page_cache_readahead()) is 48 lines.

--
  Gregory Stark
  EnterpriseDB          http://www.enterprisedb.com
  Ask me about EnterpriseDB's Slony Replication support!