axeld:

* Implemented a way to do asynchronous pre-fetching when mapping files.
* There are slight code duplications in some places that could benefit
  from cleaning up, but nothing too bad.
* Implementing smarter ways to trigger prefetching and more analysis of
  the situations in the kernel would be nice. Currently up to 10 MB
  of every mapped file are pre-fetched without further analysis.
* The speed improvement is nice for certain operations. On our test
  system (real hardware), Firefox took 9 seconds from being launched
  to display a window. Now it takes 5 seconds. Both measurements
  right after booting. The same system took 35 seconds from launching
  Haiku in the GRUB menu to displaying the Tracker desktop background
  image. Now it takes 27 seconds.
* We didn't have the chance to check out the effects of this on the
  CD boot, but potentially, they could speed it up a lot.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30465 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/vfs.h

@@ -286,6 +286,10 @@ protected:
 };
 
 
+status_t vfs_asynchronous_read_pages(struct vnode* vnode, void* cookie,
+			off_t pos, const iovec* vecs, size_t count, size_t numBytes,
+			uint32 flags, AsyncIOCallback* callback);
+
 status_t vfs_asynchronous_write_pages(struct vnode* vnode, void* cookie,
 			off_t pos, const iovec* vecs, size_t count, size_t numBytes,
 			uint32 flags, AsyncIOCallback* callback);