On 2/14/19 5:42 AM, Juergen Gross wrote: > Don't allow memory to be added above the allowed maximum allocation > limit set by Xen. > > Trying to do so would result in cases like the following: > > [ 584.559652] ------------[ cut here ]------------ > [ 584.564897] WARNING: CPU: 2 PID: 1 at ../arch/x86/xen/multicalls.c:129 > xen_alloc_pte+0x1c7/0x390() > [ 584.575151] Modules linked in: > [ 584.578643] Supported: Yes > [ 584.581750] CPU: 2 PID: 1 Comm: swapper/0 Not tainted > 4.4.120-92.70-default #1 > [ 584.590000] Hardware name: Cisco Systems Inc UCSC-C460-M4/UCSC-C460-M4, > BIOS C460M4.4.0.1b.0.0629181419 06/29/2018 > [ 584.601862] 0000000000000000 ffffffff813175a0 0000000000000000 > ffffffff8184777c > [ 584.610200] ffffffff8107f4e1 ffff880487eb7000 ffff8801862b79c0 > ffff88048608d290 > [ 584.618537] 0000000000487eb7 ffffea0000000201 ffffffff81009de7 > ffffffff81068561 > [ 584.626876] Call Trace: > [ 584.629699] [<ffffffff81019ad9>] dump_trace+0x59/0x340 > [ 584.635645] [<ffffffff81019eaa>] show_stack_log_lvl+0xea/0x170 > [ 584.642391] [<ffffffff8101ac51>] show_stack+0x21/0x40 > [ 584.648238] [<ffffffff813175a0>] dump_stack+0x5c/0x7c > [ 584.654085] [<ffffffff8107f4e1>] warn_slowpath_common+0x81/0xb0 > [ 584.660932] [<ffffffff81009de7>] xen_alloc_pte+0x1c7/0x390 > [ 584.667289] [<ffffffff810647f0>] pmd_populate_kernel.constprop.6+0x40/0x80 > [ 584.675241] [<ffffffff815ecfe8>] phys_pmd_init+0x210/0x255 > [ 584.681587] [<ffffffff815ed207>] phys_pud_init+0x1da/0x247 > [ 584.687931] [<ffffffff815edb3b>] kernel_physical_mapping_init+0xf5/0x1d4 > [ 584.695682] [<ffffffff815e9bdd>] init_memory_mapping+0x18d/0x380 > [ 584.702631] [<ffffffff81064699>] arch_add_memory+0x59/0xf0 > > Signed-off-by: Juergen Gross <jgr...@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrov...@oracle.com>
