An Overview of Locking in the FreeBSD Kernel
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| Title | An Overview of Locking in the FreeBSD Kernel |
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| Number of Parts | 24 |
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| License | You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor and the work or content is shared also in adapted form only under the conditions of this license. |
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| Abstract | The FreeBSD kernel uses seven different types of locks to ensure proper access to the resources that it manages. This talk describes the hierarchy of these locks from the low-level and simple to the high-level and full-featured.
The functionality of each type of lock is described along with the problem domain for which it is intended. The talk concludes by describing the witness system within the FreeBSD kernel that tracks the usage of all the locks in the system and reports any possible deadlocks that might occur because of improper acquisition ordering of locks. |
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