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authorJohn Dyson <dyson@FreeBSD.org>1996-12-29 02:45:28 +0000
committerJohn Dyson <dyson@FreeBSD.org>1996-12-29 02:45:28 +0000
commit8b612c4b4a0a3ab542a208665055a5595f338fa8 (patch)
tree0be85582a1c640271ed7ce19fc19c0c85527cb9c /lib
parent87241caa43a2cf0a8d5fa8315753a80d47e5c39f (diff)
downloadsrc-8b612c4b4a0a3ab542a208665055a5595f338fa8.tar.gz
src-8b612c4b4a0a3ab542a208665055a5595f338fa8.zip
This commit is the embodiment of some VFS read clustering improvements.
Firstly, now our read-ahead clustering is on a file descriptor basis and not on a per-vnode basis. This will allow multiple processes reading the same file to take advantage of read-ahead clustering. Secondly, there previously was a problem with large reads still using the ramp-up algorithm. Of course, that was bogus, and now we read the entire "chunk" off of the disk in one operation. The read-ahead clustering algorithm should use less CPU than the previous also (I hope :-)). NOTE: THAT LKMS MUST BE REBUILT!!!
Notes
Notes: svn path=/head/; revision=21002
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