On Wednesday, 18 January 2012 at 19:58:19 -0500, Dieter BSD wrote: >> The original goal for 5.0 was to completely remove the Giant lock (and >> do other cool SMP-related stuff). Eventually it was realized that this >> was too big a goal to fully accomplish in 5.0 (albeit too late in the >> process) and the goal was changed to do the basic framework for the new >> SMP model; and lay the groundwork for "some things run under Giant for >> now, and we'll remove it from them ASAP." That actually turned out to >> last through 6, making 7 the realization of what 5.0 was supposed to be. > > So you are saying that the Giant lock was completely removed in 7.0?
Giant is still there in 9.0. It's a pity you didn't say who you were quoting there. To my knowledge we never intended to completely remove Giant in 5.x. We realised from the start that it would take a long time. See http://www.lemis.com/grog/diary-jun2000.php for what we decided 12 years ago. Point 6 suggests removing the "Giant Kernel Spinlock", but that is misleading. We did that, and we gave the name Giant to the "blocking mutex for the kernel". Previously Giant didn't have a name, because it was the only one. Greg -- Sent from my desktop computer Finger g...@freebsd.org for PGP public key. See complete headers for address and phone numbers. This message is digitally signed. If your Microsoft MUA reports problems, please read http://tinyurl.com/broken-mua
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