Messages in this thread | | | Date | Thu, 11 Jan 2001 14:03:48 -0500 (EST) | From | Alexander Viro <> | Subject | Re: Subtle MM bug |
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On Thu, 11 Jan 2001, Stephen C. Tweedie wrote:
> Hi, > > On Thu, Jan 11, 2001 at 02:12:05PM +0100, Trond Myklebust wrote: > > > > What's wrong with copy-on-write style semantics? IOW, anyone who > > wants to change the credentials needs to make a private copy of the > > existing structure first. > > Because COW only solves the problem if each task is only changing its > own, local, private copy of the credentials. Posix threads demand > that one thread changing credentials also affects all the other > threads immediately, and making your own local private copy won't help > you to change the other tasks' credentials safely.
And how is that different from the current situation?
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