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authordyson <dyson@FreeBSD.org>1996-12-29 02:45:28 +0000
committerdyson <dyson@FreeBSD.org>1996-12-29 02:45:28 +0000
commit04a0ee9a2a23ea1925b6625e3268da60ccc7944b (patch)
tree0be85582a1c640271ed7ce19fc19c0c85527cb9c /lib/libc_r
parentbaa03b956c25159833733ce567a847c13e9bd032 (diff)
downloadFreeBSD-src-04a0ee9a2a23ea1925b6625e3268da60ccc7944b.zip
FreeBSD-src-04a0ee9a2a23ea1925b6625e3268da60ccc7944b.tar.gz
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!!!
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