On 08/06/15 13:06, Juergen Gross wrote: > Check whether the hypervisor supplied p2m list is placed at a location > which is conflicting with the target E820 map. If this is the case > relocate it to a new area unused up to now and compliant to the E820 > map. > > As the p2m list might by huge (up to several GB) and is required to be > mapped virtually, set up a temporary mapping for the copied list. > > For pvh domains just delete the p2m related information from start > info instead of reserving the p2m memory, as we don't need it at all. > > For 32 bit kernels adjust the memblock_reserve() parameters in order > to cover the page tables only. This requires to memblock_reserve() the > start_info page on it's own. This commit breaks 32-bit PV domUs. I've dropped this whole series for now because: a) you've clearly not tested this series enough with domUs. b) patch #12 (mm: provide early_memremap_ro to establish read-only mapping) is lacking an ack from an MM maintainer (sorry for not noticing this earlier). Please try again for 4.3. David [ 0.050840] Unpacking initramfs... [ 0.050979] BUG: unable to handle kernel paging request at c22c2008 [ 0.050986] IP: [<c128373d>] memcpy+0x1d/0x40 [ 0.050992] *pdpt = 0000000001e97027 *pde = 00000000022c3067 *pte = 80000000022c2061 [ 0.051002] Oops: 0003 [#1] SMP [ 0.051008] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.1.0-rc5.davidvr #11 [ 0.051013] task: df498000 ti: df492000 task.ti: df492000 [ 0.051018] EIP: e019:[<c128373d>] EFLAGS: 00010206 CPU: 0 [ 0.051023] EIP is at memcpy+0x1d/0x40 [ 0.051027] EAX: c22c2000 EBX: 00001000 ECX: 000003fe EDX: c20ca160 [ 0.051032] ESI: c20ca168 EDI: c22c2008 EBP: df493ce0 ESP: df493cd4 [ 0.051037] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: e021 [ 0.051042] CR0: 80050033 CR2: c22c2008 CR3: 016d2000 CR4: 00042660 [ 0.051049] Stack: [ 0.051052] 00001000 00001000 00000000 df493d04 c1288df8 c111f6c5 df493de8 c22c2000 [ 0.051062] c22c3000 00001000 00001000 00000000 df493d58 c110a5e5 00001000 00000000 [ 0.052004] 00001000 00000001 df493d44 df493d48 df498000 00000001 c146fbe0 df5a7000 [ 0.052004] Call Trace: [ 0.052004] [<c1288df8>] iov_iter_copy_from_user_atomic+0xd8/0x190 [ 0.052004] [<c111f6c5>] ? shmem_write_begin+0x55/0x90 [ 0.052004] [<c110a5e5>] generic_perform_write+0xc5/0x1a0 [ 0.052004] [<c110a852>] __generic_file_write_iter+0x192/0x1d0 [ 0.052004] [<c110a99c>] generic_file_write_iter+0x10c/0x300 [ 0.052004] [<c145e2f7>] ? __mutex_unlock_slowpath+0xb7/0x1f0 [ 0.052004] [<c10a3ae1>] ? lock_acquire+0xc1/0x240 [ 0.052004] [<c114a8f9>] __vfs_write+0xa9/0xe0 [ 0.052004] [<c114aaa0>] vfs_write+0x80/0x150 [ 0.052004] [<c11674f2>] ? __fdget+0x12/0x20 [ 0.052004] [<c114ac88>] SyS_write+0x58/0xc0 [ 0.052004] [<c162db20>] xwrite+0x27/0x53 [ 0.052004] [<c162db70>] do_copy+0x24/0xde [ 0.052004] [<c162d6a3>] write_buffer+0x1e/0x2d [ 0.052004] [<c162d931>] unpack_to_rootfs+0xe6/0x2ae [ 0.052004] [<c10ad997>] ? vprintk_default+0x37/0x40 [ 0.052004] [<c162e049>] populate_rootfs+0x51/0x9b [ 0.052004] [<c162cda4>] do_one_initcall+0x110/0x1bb [ 0.052004] [<c162dff8>] ? maybe_link.part.1+0xe9/0xe9 [ 0.052004] [<c107c068>] ? parameq+0x18/0x70 [ 0.052004] [<c162c5ac>] ? repair_env_string+0x12/0x51 [ 0.052004] [<c162dff8>] ? maybe_link.part.1+0xe9/0xe9 [ 0.052004] [<c107c349>] ? parse_args+0x289/0x4b0 [ 0.052004] [<c14601de>] ? _raw_spin_unlock_irqrestore+0x3e/0x60 [ 0.052004] [<c1072ce3>] ? __usermodehelper_set_disable_depth+0x43/0x50 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>