On Mon, Apr 03, 2017 at 06:30:21AM -0700, Kyle Fortin wrote: > iscsiadm session login can fail with the following error: > > iscsiadm: Could not login to [iface: default, target: iqn.1986-03.com... > iscsiadm: initiator reported error (9 - internal error) > > When /etc/iscsi/iscsid.conf sets node.session.cmds_max = 4096, it results > in 64K-sized kmallocs per session. A system under fragmented slab > pressure may not have any 64K objects available and fail iscsiadm session > login. Even though memory objects of a smaller size are available, the > large order allocation ends up failing. > > The kernel will print a warning and dump_stack, like below: There is a series of patches in Andrew's mmotm tree, which introduces a kvmalloc() function, that does exactly what you're looking for. Maybe you want to base your patch on top of it. -- Johannes Thumshirn Storage jthumshirn@xxxxxxx +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
