On Fri, 5 Mar 2010 17:37:16 +0000 Alasdair G Kergon <agk@xxxxxxxxxx> wrote: > 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? Yes. This http://marc.info/?l=linux-raid&m=126672681521073&w=2 almost certainly refers to that problem. NeilBrown > > Alasdair. > > -- > dm-devel mailing list > dm-devel@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/dm-devel -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
