14de8a2820
- Add tracker argument to preemptible epochs - Inline epoch read path in kernel and tied modules - Change in_epoch to take an epoch as argument - Simplify tfb_tcp_do_segment to not take a ti_locked argument, there's no longer any benefit to dropping the pcbinfo lock and trying to do so just adds an error prone branchfest to these functions - Remove cases of same function recursion on the epoch as recursing is no longer free. - Remove the the TAILQ_ENTRY and epoch_section from struct thread as the tracker field is now stack or heap allocated as appropriate. Tested by: pho and Limelight Networks Reviewed by: kbowling at llnw dot com Sponsored by: Limelight Networks Differential Revision: https://reviews.freebsd.org/D16066
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