On Thu, 2011-03-03 at 18:49:44 +0100, Raphael Hertzog wrote: > On Thu, 03 Mar 2011, Phillip Susi wrote: > > It would be much better to use aio to queue up all of the syncs at once, > > so that the elevator can coalesce and reorder them for optimal writing. > > I'm not convinced it would help. You're welcome to try and provide a > patch if it works. > > I'm not even convinced it's possible with the existing interfaces (but I > have no experience with AIO). aio_fsync() is only usable with aio_write() > and it's not possible to use lio_listio() to batch a bunch of aio_fsync().
Actually, this was discarded early on, as Linux does not implement aio_fsync() for any file system. Also the interface is quite cumbersome as it requires to keep state for each aio operation, and using SA_SIGINFO (which is not yet available everywhere). regards, guillem -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110303183039.ga4...@gaara.hadrons.org
