Messages in this thread | | | Date | Fri, 4 Feb 2005 18:30:27 +0100 | From | Ingo Molnar <> | Subject | Re: [patch] Real-Time Preemption, -RT-2.6.11-rc3-V0.7.38-01 |
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* Kevin Hilman <kevin@hilman.org> wrote:
> What I've done for now is to use sema_init_nocheck() to disable the > checking in the case of a counting semaphore, but I remember seeing > discussion in an earlier thread about creating a separate counting > semaphore type. Is this still planned?
the nocheck variant is the counting semaphore in essence. I removed the counting semaphore implementation because it caused more problems than it solved - but it can be reintroduced later.
> [*] For example, an open semaphore being down'ed and thus acquired and > the same thread doing a down() again before another thread has a > chance to up() the semaphore.
yeah, these are cases where the code is better off using completions anyway. Thomas Gleixner had a good bunch of patches to convers such semaphore use to completions - the most necessary ones are in -RT, and i hope he'll submit the whole bunch upstream after 2.6.11 is out :-)
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