Hello, Yinghai. On 02/25/2010 08:32 AM, Yinghai Lu wrote: >>> Kernel panic - not syncing: free_early on not reserved area: 2f80000-2f9ffff! >>> Pid: 0, comm: swapper Not tainted 2.6.33-rc8-tip-00918-gb34d361 #159 >>> Call Trace: >>> [<ffffffff815d12e2>] panic+0x84/0x147 >>> [<ffffffff81cceecb>] free_early+0x64/0x6d >>> [<ffffffff81cd2231>] free_bootmem+0xc/0xe >>> [<ffffffff81cc1cd6>] pcpu_fc_free+0x1d/0x1f >>> [<ffffffff81cd6056>] pcpu_embed_first_chunk+0x13a/0x27f >>> [<ffffffff81cc1cd8>] ? pcpu_fc_alloc+0x0/0xac >>> [<ffffffff81cc1cb9>] ? pcpu_fc_free+0x0/0x1f >>> [<ffffffff81cc1af7>] setup_per_cpu_areas+0x82/0x239 >>> [<ffffffff81cb5b3c>] start_kernel+0x1b8/0x43b >>> [<ffffffff81cb52bc>] x86_64_start_reservations+0xa7/0xab >>> [<ffffffff81cb53b8>] x86_64_start_kernel+0xf8/0x107 >>> >> >> we can not handle partial free, and current only user for that is pcpu_setup... > > any plan to pcpu_setup to use slab allocation instead of bootmem? > that code is only one user that do partial bootmem free. The problem is that the pcpu_embed_first_chunk() allocator depends on having a large contiguous slab of memory to overlay the percpu variables and then giving back the unused parts (due to layout and cpu_possible_mask not being contiguous). There's no way to do partial alloc/free anymore? Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
