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Link Here
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<title>Filesystem I/O—<literal>struct buf</literal></title> |
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<title>Filesystem I/O—<literal>struct buf</literal></title> |
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<para>vnode-backed VM objects, such as file-backed objects, generally |
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<para>vnode-backed VM objects, such as file-backed objects, generally |
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need to maintain their own clean/dirty info independant from the VM |
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need to maintain their own clean/dirty info independent from the VM |
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system's idea of clean/dirty. For example, when the VM system decides |
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system's idea of clean/dirty. For example, when the VM system decides |
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to synchronize a physical page to its backing store, the VM system |
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to synchronize a physical page to its backing store, the VM system |
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needs to mark the page clean before the page is actually written to |
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needs to mark the page clean before the page is actually written to |