討論串sema replacement
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It looks like the code queues up a request and then uses sema_wait() to. sleep until the request either completes or fails. In both cases, the. code c
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I would say we want to use tokens for now. The ATA driver core should. be mostly non-blocking, at least presuming that sos hasn't added. mallocs in th
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FreeBSD's new ATA code makes use of kernel counting semaphores (sema(9)). in the queuing code which don't seem to exist in DragonFly*. I think the. se
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