On Wed, Nov 09, 2011 at 11:29:31AM +0100, Jan Schmidt wrote: > Am 09.11.2011 08:48, schrieb Christoph Hellwig: > >On Tue, Nov 08, 2011 at 08:07:01PM -0500, Chris Mason wrote: > >>Looks like bio_add_page() is failing and we're getting the enomem from > >>there. LVM is only letting us put one page in each bio. > > > >Yes, at the moment all bio based DM targets only allow single page I/O. > > Wait. If I got that correctly, each bio_add_page needs special > ENOMEM treatment (assuming the target could always be a device > mapper target), right? > > "grep bio_add_page fs/btrfs/*.c" will make you unhappy. You can always add a single page into a bio. We do need to deal better with mixed devices where some have a low limit and some a high limit. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
