Messages in this thread |  | | Subject | Re: [Lse-tech] Re: RFC: patch to allow lock-free traversal of lists with insertion | From | Andi Kleen <> | Date | 13 Oct 2001 20:42:34 +0200 |
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In article <Pine.LNX.4.33.0110131015410.8707-100000@penguin.transmeta.com>, Linus Torvalds <torvalds@transmeta.com> writes:
> - nobody has shown a case where existing normal locking ends up being > really a huge problem, and where RCU clearly helps.
The poster child of such a case is module unloading. Keeping reference counts for every even non sleeping use of a module is very painful. The current "fix" -- putting module count increases in all possible module callers to fix the unload races is slow and ugly and far too subtle to get everything right. Waiting quiescent periods before unloading is a nice alternative.
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