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| /freebsd-10.1-release/sys/cam/ | ||
| H A D | cam_xpt.c | diff 141566 Wed Feb 09 09:44:15 MST 2005 scottl Provide locking for the ccb_bioq. This allows xpt_done() to be called without Giant held. In camisr(), move the ccb_bioq elements to a temporary local list and then process the elements off of that list. This enables the list to be processed by only taking the ccb_bioq_lock once and only for a very short time. ccb_bioq_lock is a leaf mutex, so it's fine to call xpt_done() with other locks held. This is just a very minor step in the work to lock CAM, but it allows us to avoid some messy locking/unlock dances in certain drivers. |
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