On 09/14/2010 05:09 AM, CAI Qian wrote: > This commit introduced a regression that an empty vmcore was generated on a kvm guest. > ioremap: invalid physical address db74000000000000 > ------------[ cut here ]------------ > WARNING: at arch/x86/mm/ioremap.c:83 __ioremap_caller+0x307/0x380() > Hardware name: KVM > Modules linked in: > Pid: 1, comm: swapper Not tainted 2.6.36-rc2-mm1+ #2 > Call Trace: > [<ffffffff8105f48f>] warn_slowpath_common+0x7f/0xc0 > [<ffffffff8103052e>] ? copy_oldmem_page+0x4e/0xc0 > [<ffffffff8105f4ea>] warn_slowpath_null+0x1a/0x20 > [<ffffffff8103f0a7>] __ioremap_caller+0x307/0x380 > [<ffffffff8103f1f7>] ioremap_nocache+0x17/0x20 > [<ffffffff8103052e>] copy_oldmem_page+0x4e/0xc0 > [<ffffffff811af4ca>] read_from_oldmem+0x7a/0xb0 > [<ffffffff81c4f70b>] merge_note_headers_elf64.clone.1+0x6c/0x21f > [<ffffffff8103056e>] ? copy_oldmem_page+0x8e/0xc0 > [<ffffffff811af4ca>] ? read_from_oldmem+0x7a/0xb0 > [<ffffffff81c4fa5b>] vmcore_init+0x19d/0x396 > [<ffffffff81c4f8be>] ? vmcore_init+0x0/0x396 > [<ffffffff81002053>] do_one_initcall+0x43/0x190 > [<ffffffff81c278ab>] kernel_init+0x2a0/0x330 > [<ffffffff8100be84>] kernel_thread_helper+0x4/0x10 > [<ffffffff81c2760b>] ? kernel_init+0x0/0x330 > [<ffffffff8100be80>] ? kernel_thread_helper+0x0/0x10 > ---[ end trace 93d72a36b9146f22 ]--- > Kdump: vmcore not initialized > > commit 020ec6537aa65c18e9084c568d7b94727f2026fd > Author: Tejun Heo <tj at kernel.org> > Date: Fri Apr 9 18:57:00 2010 +0900 > > percpu: factor out pcpu_addr_in_first/reserved_chunk() and update per_cpu_ptr_to_phys() Hmm... I'm confused. Isn't this the one fixed by commit 9983b6f0 (percpu: fix first chunk match in per_cpu_ptr_to_phys())? Thanks. -- tejun
