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On Tue, 29 Jan 2002, Andrew Morton wrote: > Andreas Dilger wrote: > > > > But if it is unused and not recently referenced, there is little benefit > > in keeping it around, is there? > > In all of this, please remember that all caches are not of > equal value-per-byte. A single page contains 32 dentries, > and can thus save up to 32 disk seeks. It's potentially > a *lot* more valuable than a (single-seek) pagecache page. Or it might equally well be 32 contiguous directory entries that you scanned over to get to the file you wanted. If it's 32 hot items, as a page it's going to be aged significantly less than one equally hot pagecache page, so I don't think we need to worry about that too much. -- "Love the dolphins," she advised him. "Write by W.A.S.T.E.." - 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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