Messages in this thread |  | | | Subject | Re: Bio pool & scsi scatter gather pool usage | | Date | Fri, 19 Apr 2002 09:58:36 +0100 (BST) | | From | Alan Cox <> |
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> But this gets you lowest common denominator sizes for the whole > volume, which is basically the buffer head approach, chop all I/O up > into a chunk size we know will always work. Any sort of nasty boundary > condition at one spot in a volume means the whole thing is crippled > down to that level. It then becomes a black magic art to configure a > volume which is not restricted to a small request size.
Its still cheaper to merge bio chains than split them. The VM issues with splitting them are not nice at all since you may need to split a bio to write out a page and it may be the last page - 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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