On Mon, Aug 14, 2006 at 02:13:32PM +0200, Stefan Bader wrote: > I found a problem within device-mapper that occurs in low-mem > situations. It was found using a mirror target but I think in theory it > would hit any setup that stacks device-mapper devices (like LVM on top > of multipath). Several dm targets suffer from this. Mempools are not yet used correctly everywhere in device-mapper: they can get shared when devices are stacked, and some targets share them across multiple instances. I made fixing this one of the prerequisites for this patch: md-dm-reduce-stack-usage-with-stacked-block-devices.patch which in some cases makes people more likely to hit the problem. There's been some progress on this recently with (unfinished) dm-crypt patches at: http://www.kernel.org/pub/linux/kernel/people/agk/patches/2.6/editing/ (dm-crypt-move-io-to-workqueue.patch plus dependencies) I'll add (the first part of) your patch to the mix as it's another required piece of the jigsaw, thanks. Alasdair -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
