12 lines
637 B
ReStructuredText
12 lines
637 B
ReStructuredText
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Subpage support
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===============
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Subpage block size support, or just *subpage* for short, is a feature to allow
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using a filesystem that has different size of data block size (*sectorsize*)
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and the host CPU page size. For easier implementation the support was limited
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to the exactly same size of the block and page. On x86_64 this is typically
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4KiB, but there are other architectures commonly used that make use of larger
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pages, like 64KiB on 64bit ARM or PowerPC. A filesystem created on one cannot
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be mounted on the other. The subpage support is still work in progress in 5.18
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but the support is incrementally added with each release.
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