Unit Instance

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{
    "translation": "https://translate-dev.freebsd.org/api/translations/documentation/booksarch-handbooksmp_index/en/?format=api",
    "source": [
        "`struct ucred` is the kernel's internal credential structure, and is generally used as the basis for process-driven access control within the kernel. BSD-derived systems use a \"copy-on-write\" model for credential data: multiple references may exist for a credential structure, and when a change needs to be made, the structure is duplicated, modified, and then the reference replaced. Due to wide-spread caching of the credential to implement access control on open, this results in substantial memory savings. With a move to fine-grained SMP, this model also saves substantially on locking operations by requiring that modification only occur on an unshared credential, avoiding the need for explicit synchronization when consuming a known-shared credential."
    ],
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        "`struct ucred` is the kernel's internal credential structure, and is generally used as the basis for process-driven access control within the kernel. BSD-derived systems use a \"copy-on-write\" model for credential data: multiple references may exist for a credential structure, and when a change needs to be made, the structure is duplicated, modified, and then the reference replaced. Due to wide-spread caching of the credential to implement access control on open, this results in substantial memory savings. With a move to fine-grained SMP, this model also saves substantially on locking operations by requiring that modification only occur on an unshared credential, avoiding the need for explicit synchronization when consuming a known-shared credential."
    ],
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    "location": "documentation/content/en/books/arch-handbook/smp/_index.adoc:158",
    "context": "",
    "note": "type: Plain text",
    "flags": "",
    "labels": [],
    "state": 100,
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    "position": 53,
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    "num_words": 111,
    "source_unit": "https://translate-dev.freebsd.org/api/units/1134266/?format=api",
    "priority": 100,
    "id": 1134266,
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    "url": "https://translate-dev.freebsd.org/api/units/1134266/?format=api",
    "explanation": "",
    "extra_flags": "",
    "pending": false,
    "timestamp": "2021-05-23T13:16:47.428836Z"
}