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Linus Torvalds <torvalds@osdl.org> writes: [...] > > We actually had (for a short while) code that tracked the dirty bit in > software (ie make it unwritable by default, and take the write fault), but > people showed that that was actually a real performance problem on some > loads. Dirtiness can be tracked for a fraction of pages (for example, make pte unwritable when page crosses active/inactive list boundary, or alike). This will allow kernel to guarantee that there really is _known_ amount of clean pages in the system, without taking a lot of unnecessary faults. [... notes on kernel development methodology skipped ...] > > Linus Nikita. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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