Good job! > On Dec 29, 2019, at 7:46 PM, Alexander Motin <m...@freebsd.org> wrote: > > Author: mav > Date: Mon Dec 30 00:46:10 2019 > New Revision: 356192 > URL: https://svnweb.freebsd.org/changeset/base/356192 > > Log: > Retire nstart/nend counters. > > Those counters were abused for decade to workaround broken orphanization > process in different classes by delaying the call while there are active > requests. But from one side it did not close all the races, while from > another was quite expensive on SMP due to trashing twice per request cache > lines of consumer and provider and requiring locks. It lost its sense > after I manually went through all the GEOM classes in base and made > orphanization wait for either provider close or request completion. > > Consumer counters are still used under INVARIANTS to detect premature > consumer close and detach. Provider counters are removed completely. > > Sponsored by: iXsystems, Inc. > > Modified: > head/sys/geom/geom.h > head/sys/geom/geom_event.c > head/sys/geom/geom_io.c > head/sys/geom/geom_subr.c
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