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* Remove support for FreeBSD 7 and really old FreeBSD 8. The classifiersimp2014-12-201-23/+3
| | | | | | | | | have been in the base for a while, so the gymnastics here aren't needed. In addition, the bugs in subr_disk.c have been fixed since 2009, so there's no need for an identical copy of it in the tree anymore. There's really no need to binary patch g_io_request, so let's get rid of the code (not compiled in anymore) lest others think it is a good idea.
* Bring in geom_sched, support for scheduling disk I/O requestsluigi2010-04-121-0/+162
in a device independent manner. Also include an example anticipatory scheduler, gsched_rr, which gives very nice performance improvements in presence of competing random access patterns. This is joint work with Fabio Checconi, developed last year and presented at BSDCan 2009. You can find details in the README file or at http://info.iet.unipi.it/~luigi/geom_sched/
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