On 02/24/2010 06:07 PM, Tejun Heo wrote: > 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? ok, will add free_early_partial to handle it. i got impression, when we are moving slab ealier. you said that will check to make percpu setup to use slab allocator instead. YH -- 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
