On Thu, Mar 04, 2010 at 06:59:21PM +0100, Lars Ellenberg wrote: > + /* Restricting max_sectors is not enough. > + * If someone uses bio_add_page to add 8 disjunct 512 byte > + * partial pages to a bio, it would succeed, > + * but could still cross a border of whatever restrictions > + * are below us (raid0 stripe boundary). An attempted > + * bio_split would not succeed, because bi_vcnt is 8. > + * E.g. the xen io layer is known to trigger this. > + */ Sounds plausible. Do you or anyone readingt his have example messages demonstrating the failure when this patch is not applied? Alasdair. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
