Messages in this thread |  | | From | Christoph Rohland <> | Subject | Re: VM subsystem bug in 2.4.0 ? | Date | 09 Jan 2001 15:53:55 +0100 |
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Hi Stephen,
On Tue, 9 Jan 2001, Stephen C. Tweedie wrote: > But again, how do you clear the bit? Locking is a per-vma property, > not per-page. I can mmap a file twice and mlock just one of the > mappings. If you get a munlock(), how are you to know how many > other locked mappings still exist?
It's worse: The issue we are talking about is SYSV IPC_LOCK. This is a per segment thing. A user can (un)lock a segment at any time. But we do not have the references to the vmas attached to the segemnts or to the pages allocated.
Greetings Christoph
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