[ adding linux-mm - previously at http://marc.info/?t=134511509400003 ] Hi Rik, Since qemu-kvm 1.2.0 and Linux 3.6.0-rc5 came out, I thought that I would retest with these. The typical symptom now appears to be that the Windows VMs boot reasonably fast, but then there is high CPU use and load for many minutes afterwards - the high CPU use is both for the qemu-kvm processes themselves and also for % sys. I attach a perf report which seems to show that the high CPU use is in the memory manager. Cheers, Richard. # ======== # captured on: Wed Sep 12 10:25:43 2012 # os release : 3.6.0-rc5-elastic # perf version : 3.5.2 # arch : x86_64 # nrcpus online : 16 # nrcpus avail : 16 # cpudesc : AMD Opteron(tm) Processor 6128 # cpuid : AuthenticAMD,16,9,1 # total memory : 131973280 kB # cmdline : /home/root/bin/perf record -g -a # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 } # HEADER_CPU_TOPOLOGY info available, use -I to display # HEADER_NUMA_TOPOLOGY info available, use -I to display # ======== # # Samples: 870K of event 'cycles' # Event count (approx.): 432968175910 # # Overhead Command Shared Object Symbol # ........ ............... .................... .............................................. # 89.14% qemu-kvm [kernel.kallsyms] [k] _raw_spin_lock_irqsave | --- _raw_spin_lock_irqsave | |--95.47%-- isolate_migratepages_range | compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--55.64%-- 0x10100000002 | | | --44.36%-- 0x10100000006 | |--4.53%-- compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--55.36%-- 0x10100000002 | | | --44.64%-- 0x10100000006 --0.00%-- [...] 4.92% qemu-kvm [kernel.kallsyms] [k] migrate_pages | --- migrate_pages | |--99.74%-- compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--55.80%-- 0x10100000002 | | | --44.20%-- 0x10100000006 --0.26%-- [...] 1.59% ksmd [kernel.kallsyms] [k] memcmp | --- memcmp | |--99.69%-- memcmp_pages | | | |--78.86%-- ksm_scan_thread | | kthread | | kernel_thread_helper | | | --21.14%-- try_to_merge_with_ksm_page | ksm_scan_thread | kthread | kernel_thread_helper --0.31%-- [...] 0.85% ksmd [kernel.kallsyms] [k] smp_call_function_many | --- smp_call_function_many native_flush_tlb_others | |--99.81%-- flush_tlb_page | ptep_clear_flush | try_to_merge_with_ksm_page | ksm_scan_thread | kthread | kernel_thread_helper --0.19%-- [...] 0.38% swapper [kernel.kallsyms] [k] default_idle | --- default_idle | |--99.80%-- cpu_idle | | | |--90.53%-- start_secondary | | | --9.47%-- rest_init | start_kernel | x86_64_start_reservations | x86_64_start_kernel --0.20%-- [...] 0.38% qemu-kvm [kernel.kallsyms] [k] _raw_spin_unlock_irqrestore | --- _raw_spin_unlock_irqrestore | |--94.31%-- compact_checklock_irqsave | isolate_migratepages_range | compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--59.74%-- 0x10100000006 | | | --40.26%-- 0x10100000002 | |--3.41%-- isolate_migratepages_range | compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--53.57%-- 0x10100000006 | | | --46.43%-- 0x10100000002 | |--0.82%-- ntp_tick_length | do_timer | tick_do_update_jiffies64 | tick_sched_timer | __run_hrtimer.isra.28 | hrtimer_interrupt | smp_apic_timer_interrupt | apic_timer_interrupt | compact_checklock_irqsave | isolate_migratepages_range | compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | 0x10100000002 | |--0.76%-- __page_cache_release.part.11 | __put_compound_page | put_compound_page | release_pages | free_pages_and_swap_cache | tlb_flush_mmu | tlb_finish_mmu | exit_mmap | mmput | exit_mm | do_exit | do_group_exit | get_signal_to_deliver | do_signal | do_notify_resume | int_signal --0.70%-- [...] 0.26% qemu-kvm [kernel.kallsyms] [k] isolate_migratepages_range | --- isolate_migratepages_range | |--95.44%-- compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--52.46%-- 0x10100000002 | | | --47.54%-- 0x10100000006 | --4.56%-- compact_zone_order try_to_compact_pages __alloc_pages_direct_compact __alloc_pages_nodemask alloc_pages_vma do_huge_pmd_anonymous_page handle_mm_fault __get_user_pages get_user_page_nowait hva_to_pfn.isra.17 __gfn_to_pfn gfn_to_pfn_async try_async_pf tdp_page_fault kvm_mmu_page_fault pf_interception handle_exit kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl system_call_fastpath ioctl | |--53.84%-- 0x10100000006 | --46.16%-- 0x10100000002 0.21% qemu-kvm [kernel.kallsyms] [k] compact_zone | --- compact_zone compact_zone_order try_to_compact_pages __alloc_pages_direct_compact __alloc_pages_nodemask alloc_pages_vma do_huge_pmd_anonymous_page handle_mm_fault __get_user_pages get_user_page_nowait hva_to_pfn.isra.17 __gfn_to_pfn gfn_to_pfn_async try_async_pf tdp_page_fault kvm_mmu_page_fault pf_interception handle_exit kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl system_call_fastpath ioctl | |--53.46%-- 0x10100000002 | --46.54%-- 0x10100000006 0.14% qemu-kvm [kernel.kallsyms] [k] mod_zone_page_state | --- mod_zone_page_state | |--70.21%-- isolate_migratepages_range | compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--55.97%-- 0x10100000002 | | | --44.03%-- 0x10100000006 | |--29.71%-- compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--61.19%-- 0x10100000002 | | | --38.81%-- 0x10100000006 --0.08%-- [...] 0.13% qemu-kvm [kernel.kallsyms] [k] flush_tlb_func | --- flush_tlb_func | |--99.47%-- generic_smp_call_function_interrupt | smp_call_function_interrupt | call_function_interrupt | | | |--91.76%-- compact_checklock_irqsave | | isolate_migratepages_range | | compact_zone | | compact_zone_order | | try_to_compact_pages | | __alloc_pages_direct_compact | | __alloc_pages_nodemask | | alloc_pages_vma | | do_huge_pmd_anonymous_page | | handle_mm_fault | | __get_user_pages | | get_user_page_nowait | | hva_to_pfn.isra.17 | | __gfn_to_pfn | | gfn_to_pfn_async | | try_async_pf | | tdp_page_fault | | kvm_mmu_page_fault | | pf_interception | | handle_exit | | kvm_arch_vcpu_ioctl_run | | kvm_vcpu_ioctl | | do_vfs_ioctl | | sys_ioctl | | system_call_fastpath | | ioctl | | | | | |--76.39%-- 0x10100000006 | | | | | --23.61%-- 0x10100000002 | | | |--7.61%-- compact_zone | | compact_zone_order | | try_to_compact_pages | | __alloc_pages_direct_compact | | __alloc_pages_nodemask | | alloc_pages_vma | | do_huge_pmd_anonymous_page | | handle_mm_fault | | __get_user_pages | | get_user_page_nowait | | hva_to_pfn.isra.17 | | __gfn_to_pfn | | gfn_to_pfn_async | | try_async_pf | | tdp_page_fault | | kvm_mmu_page_fault | | pf_interception | | handle_exit | | kvm_arch_vcpu_ioctl_run | | kvm_vcpu_ioctl | | do_vfs_ioctl | | sys_ioctl | | system_call_fastpath | | ioctl | | | | | |--70.59%-- 0x10100000006 | | | | | --29.41%-- 0x10100000002 | --0.63%-- [...] | --0.53%-- smp_call_function_interrupt call_function_interrupt | |--83.32%-- compact_checklock_irqsave | isolate_migratepages_range | compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--79.99%-- 0x10100000006 | | | --20.01%-- 0x10100000002 | --16.68%-- compact_zone compact_zone_order try_to_compact_pages __alloc_pages_direct_compact __alloc_pages_nodemask alloc_pages_vma do_huge_pmd_anonymous_page handle_mm_fault __get_user_pages get_user_page_nowait hva_to_pfn.isra.17 __gfn_to_pfn gfn_to_pfn_async try_async_pf tdp_page_fault kvm_mmu_page_fault pf_interception handle_exit kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl system_call_fastpath ioctl 0x10100000002 0.09% qemu-kvm [kernel.kallsyms] [k] free_pages_prepare | --- free_pages_prepare | |--99.75%-- __free_pages_ok | | | |--99.84%-- free_compound_page | | __put_compound_page | | put_compound_page | | release_pages | | free_pages_and_swap_cache | | tlb_flush_mmu | | tlb_finish_mmu | | exit_mmap | | mmput | | exit_mm | | do_exit | | do_group_exit | | get_signal_to_deliver | | do_signal | | do_notify_resume | | int_signal | --0.16%-- [...] --0.25%-- [...] 0.08% :2585 [kernel.kallsyms] [k] free_pages_prepare | --- free_pages_prepare | |--99.47%-- __free_pages_ok | free_compound_page | __put_compound_page | put_compound_page | release_pages | free_pages_and_swap_cache | tlb_flush_mmu | tlb_finish_mmu | exit_mmap | mmput | exit_mm | do_exit | do_group_exit | get_signal_to_deliver | do_signal | do_notify_resume | int_signal | --0.53%-- free_hot_cold_page __free_pages | |--50.65%-- zap_huge_pmd | unmap_single_vma | unmap_vmas | exit_mmap | mmput | exit_mm | do_exit | do_group_exit | get_signal_to_deliver | do_signal | do_notify_resume | int_signal | --49.35%-- __vunmap vfree kvm_free_physmem_slot kvm_free_physmem kvm_put_kvm kvm_vcpu_release __fput ____fput task_work_run do_exit do_group_exit get_signal_to_deliver do_signal do_notify_resume int_signal 0.07% :2561 [kernel.kallsyms] [k] free_pages_prepare | --- free_pages_prepare | |--99.55%-- __free_pages_ok | free_compound_page | __put_compound_page | put_compound_page | release_pages | free_pages_and_swap_cache | tlb_flush_mmu | tlb_finish_mmu | exit_mmap | mmput | exit_mm | do_exit | do_group_exit | get_signal_to_deliver | do_signal | do_notify_resume | int_signal --0.45%-- [...] 0.07% qemu-kvm [kernel.kallsyms] [k] __zone_watermark_ok | --- __zone_watermark_ok | |--56.52%-- zone_watermark_ok | compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--59.67%-- 0x10100000002 | | | --40.33%-- 0x10100000006 | --43.48%-- compact_zone compact_zone_order try_to_compact_pages __alloc_pages_direct_compact __alloc_pages_nodemask alloc_pages_vma do_huge_pmd_anonymous_page handle_mm_fault __get_user_pages get_user_page_nowait hva_to_pfn.isra.17 __gfn_to_pfn gfn_to_pfn_async try_async_pf tdp_page_fault kvm_mmu_page_fault pf_interception handle_exit kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl system_call_fastpath ioctl | |--58.50%-- 0x10100000002 | --41.50%-- 0x10100000006 0.06% perf [kernel.kallsyms] [k] copy_user_generic_string | --- copy_user_generic_string | |--99.82%-- generic_file_buffered_write | __generic_file_aio_write | generic_file_aio_write | ext4_file_write | do_sync_write | vfs_write | sys_write | system_call_fastpath | write | run_builtin | main | __libc_start_main --0.18%-- [...] 0.05% qemu-kvm [kernel.kallsyms] [k] compact_checklock_irqsave | --- compact_checklock_irqsave | |--82.09%-- isolate_migratepages_range | compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--54.69%-- 0x10100000002 | | | --45.31%-- 0x10100000006 | --17.91%-- compact_zone compact_zone_order try_to_compact_pages __alloc_pages_direct_compact __alloc_pages_nodemask alloc_pages_vma do_huge_pmd_anonymous_page handle_mm_fault __get_user_pages get_user_page_nowait hva_to_pfn.isra.17 __gfn_to_pfn gfn_to_pfn_async try_async_pf tdp_page_fault kvm_mmu_page_fault pf_interception handle_exit kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl system_call_fastpath ioctl | |--59.49%-- 0x10100000002 | --40.51%-- 0x10100000006 0.04% qemu-kvm [kernel.kallsyms] [k] call_function_interrupt | --- call_function_interrupt | |--91.95%-- compact_checklock_irqsave | isolate_migratepages_range | compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--72.81%-- 0x10100000006 | | | --27.19%-- 0x10100000002 | |--7.50%-- compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--55.56%-- 0x10100000006 | | | --44.44%-- 0x10100000002 --0.56%-- [...] 0.04% ksmd [kernel.kallsyms] [k] default_send_IPI_mask_sequence_phys | --- default_send_IPI_mask_sequence_phys | |--99.44%-- physflat_send_IPI_mask | native_send_call_func_ipi | smp_call_function_many | native_flush_tlb_others | flush_tlb_page | ptep_clear_flush | try_to_merge_with_ksm_page | ksm_scan_thread | kthread | kernel_thread_helper | --0.56%-- native_send_call_func_ipi smp_call_function_many native_flush_tlb_others flush_tlb_page ptep_clear_flush try_to_merge_with_ksm_page ksm_scan_thread kthread kernel_thread_helper 0.03% qemu-kvm [kernel.kallsyms] [k] generic_smp_call_function_interrupt | --- generic_smp_call_function_interrupt | |--96.97%-- smp_call_function_interrupt | call_function_interrupt | | | |--97.39%-- compact_checklock_irqsave | | isolate_migratepages_range | | compact_zone | | compact_zone_order | | try_to_compact_pages | | __alloc_pages_direct_compact | | __alloc_pages_nodemask | | alloc_pages_vma | | do_huge_pmd_anonymous_page | | handle_mm_fault | | __get_user_pages | | get_user_page_nowait | | hva_to_pfn.isra.17 | | __gfn_to_pfn | | gfn_to_pfn_async | | try_async_pf | | tdp_page_fault | | kvm_mmu_page_fault | | pf_interception | | handle_exit | | kvm_arch_vcpu_ioctl_run | | kvm_vcpu_ioctl | | do_vfs_ioctl | | sys_ioctl | | system_call_fastpath | | ioctl | | | | | |--78.65%-- 0x10100000006 | | | | | --21.35%-- 0x10100000002 | | | |--2.43%-- compact_zone | | compact_zone_order | | try_to_compact_pages | | __alloc_pages_direct_compact | | __alloc_pages_nodemask | | alloc_pages_vma | | do_huge_pmd_anonymous_page | | handle_mm_fault | | __get_user_pages | | get_user_page_nowait | | hva_to_pfn.isra.17 | | __gfn_to_pfn | | gfn_to_pfn_async | | try_async_pf | | tdp_page_fault | | kvm_mmu_page_fault | | pf_interception | | handle_exit | | kvm_arch_vcpu_ioctl_run | | kvm_vcpu_ioctl | | do_vfs_ioctl | | sys_ioctl | | system_call_fastpath | | ioctl | | | | | |--57.14%-- 0x10100000002 | | | | | --42.86%-- 0x10100000006 | --0.19%-- [...] | --3.03%-- call_function_interrupt | |--77.79%-- compact_checklock_irqsave | isolate_migratepages_range | compact_zone | compact_zone_order | try_to_compact_pages | __alloc_pages_direct_compact | __alloc_pages_nodemask | alloc_pages_vma | do_huge_pmd_anonymous_page | handle_mm_fault | __get_user_pages | get_user_page_nowait | hva_to_pfn.isra.17 | __gfn_to_pfn | gfn_to_pfn_async | try_async_pf | tdp_page_fault | kvm_mmu_page_fault | pf_interception | handle_exit | kvm_arch_vcpu_ioctl_run | kvm_vcpu_ioctl | do_vfs_ioctl | sys_ioctl | system_call_fastpath | ioctl | | | |--71.42%-- 0x10100000006 | | | --28.58%-- 0x10100000002 | --22.21%-- compact_zone compact_zone_order try_to_compact_pages __alloc_pages_direct_compact __alloc_pages_nodemask alloc_pages_vma do_huge_pmd_anonymous_page handle_mm_fault __get_user_pages get_user_page_nowait hva_to_pfn.isra.17 __gfn_to_pfn gfn_to_pfn_async -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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