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3ee48b6af49cf534ca2f481ecc484b156a41451d
linux-kernel-test/arch/x86/kernel
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Cliff Wickman 3ee48b6af4 mm, x86: Saving vmcore with non-lazy freeing of vmas 
During the reading of /proc/vmcore the kernel is doing
ioremap()/iounmap() repeatedly. And the buildup of un-flushed
vm_area_struct's is causing a great deal of overhead. (rb_next()
is chewing up most of that time).

This solution is to provide function set_iounmap_nonlazy(). It
causes a subsequent call to iounmap() to immediately purge the
vma area (with try_purge_vmap_area_lazy()).

With this patch we have seen the time for writing a 250MB
compressed dump drop from 71 seconds to 44 seconds.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: kexec@lists.infradead.org
Cc: <stable@kernel.org>
LKML-Reference: <E1OwHZ4-0005WK-Tw@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-17 09:11:56 +02:00
..
acpi
Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2010-08-06 10:07:34 -07:00
apic
x86, apic: Fix apic=debug boot crash
2010-08-20 10:18:28 +02:00
cpu
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2010-08-20 14:25:08 -07:00
.gitignore
…
alternative.c
x86, alternatives: BUG on encountering an invalid CPU feature number
2010-07-13 14:57:50 -07:00
amd_iommu_init.c
x86/amd-iommu: Fall back to GART if initialization fails
2010-06-01 10:20:15 +02:00
amd_iommu.c
x86/amd-iommu: Export cache-coherency capability
2010-07-27 17:14:24 +02:00
apb_timer.c
x86, mrst: add more timer config options
2010-05-19 13:45:39 -07:00
aperture_64.c
x86, gcc-4.6: Fix set but not read variables
2010-07-20 15:38:30 -07:00
apm_32.c
update email address
2010-07-19 10:56:54 +02:00
asm-offsets_32.c
…
asm-offsets_64.c
tracing: Define NR_syscalls for x86_64
2009-08-26 21:29:58 +02:00
asm-offsets.c
…
audit_64.c
…
bios_uv.c
Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2010-02-28 11:00:55 -08:00
bootflag.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
check.c
…
cpuid.c
x86: convert cpu notifier to return encapsulate errno value
2010-05-27 09:12:48 -07:00
crash_dump_32.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
crash_dump_64.c
mm, x86: Saving vmcore with non-lazy freeing of vmas
2010-09-17 09:11:56 +02:00
crash.c
x86, UV: Make kdump avoid stack dumps
2010-07-21 11:33:27 -07:00
doublefault_32.c
x86: Use get_desc_base()
2009-07-19 18:27:51 +02:00
dumpstack_32.c
x86: Unify dumpstack.h and stacktrace.h
2010-06-08 23:29:52 +02:00
dumpstack_64.c
x86: Unify dumpstack.h and stacktrace.h
2010-06-08 23:29:52 +02:00
dumpstack.c
x86: Unify dumpstack.h and stacktrace.h
2010-06-08 23:29:52 +02:00
e820.c
suspend: Move NVS save/restore code to generic suspend functionality
2010-06-10 11:02:34 -04:00
early_printk.c
earlyprintk,vga,kdb: Fix \b and \r for earlyprintk=vga with kdb
2010-05-20 21:04:31 -05:00
early-quirks.c
x86: Force HPET readback_cmp for all ATI chipsets
2010-07-15 17:10:02 +02:00
efi_32.c
…
efi_64.c
x86: Make 64-bit efi_ioremap use ioremap on MMIO regions
2009-08-03 13:34:25 -07:00
efi_stub_32.S
…
efi_stub_64.S
…
efi.c
x86: Remove trailing spaces in messages
2010-02-07 17:47:51 +01:00
entry_32.S
Merge branch 'x86-alternatives-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2010-08-06 16:24:17 -07:00
entry_64.S
Mark arguments to certain syscalls as being const
2010-08-13 16:53:13 -07:00
ftrace.c
Merge branch 'tracing/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into tracing/core
2010-02-27 10:06:10 +01:00
head32.c
fix typos concerning "initiali[zs]e"
2010-06-16 18:05:05 +02:00
head64.c
x86: Make sure free_init_pages() frees pages on page boundary
2010-03-29 18:55:33 +02:00
head_32.S
x86-32: Separate 1:1 pagetables from swapper_pg_dir
2010-08-18 09:17:20 -07:00
head_64.S
x86-64: Simplify loading initial_gs
2010-07-21 21:23:51 -07:00
head.c
…
hpet.c
x86/hpet: Use the FSEC_PER_SEC constant for femto-second periods
2010-08-12 09:53:39 -07:00
hw_breakpoint.c
x86: Support for instruction breakpoints
2010-06-24 23:35:27 +02:00
i386_ksyms_32.c
x86: Don't generate cmpxchg8b_emu if CONFIG_X86_CMPXCHG64=y
2009-10-01 08:42:24 +02:00
i387.c
Merge branch 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2010-08-22 11:27:36 -07:00
i8237.c
…
i8253.c
i8253: Convert i8253_lock to raw_spinlock
2010-03-02 10:28:38 +01:00
i8259.c
x86, i8259: Only register sysdev if we have a real 8259 PIC
2010-07-20 15:27:33 -07:00
init_task.c
Rename .data.cacheline_aligned to .data..cacheline_aligned.
2010-03-03 11:25:58 +01:00
io_delay.c
…
ioport.c
x86-64, paravirt: Call set_iopl_mask() on 64 bits
2009-12-09 16:54:08 -08:00
irq_32.c
x86: Unify fixup_irqs() for 32-bit and 64-bit kernels
2009-11-02 15:56:34 +01:00
irq_64.c
x86: Unify fixup_irqs() for 32-bit and 64-bit kernels
2009-11-02 15:56:34 +01:00
irq.c
genirq: Convert irq_desc.lock to raw_spinlock
2009-12-14 23:55:33 +01:00
irqinit.c
x86: Merge simd_math_error() into math_error()
2010-05-03 13:39:29 -07:00
k8.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
kdebugfs.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
kgdb.c
kgdb: add missing __percpu markup in arch/x86/kernel/kgdb.c
2010-08-16 15:58:30 -05:00
kprobes.c
kprobes/x86: Fix the return address of multiple kretprobes
2010-08-19 12:49:56 +02:00
kvm.c
KVM guest: do not batch pte updates from interrupt context
2009-09-10 18:10:50 +03:00
kvmclock.c
x86, paravirt: don't compute pvclock adjustments if we trust the tsc
2010-05-19 11:41:05 +03:00
ldt.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
machine_kexec_32.c
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-12-08 13:27:33 -08:00
machine_kexec_64.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
Makefile
x86, olpc: Add support for calling into OpenFirmware
2010-06-18 14:54:36 -07:00
mca_32.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
microcode_amd.c
Revert "x86: ucode-amd: Load ucode-patches once ..."
2010-01-23 06:21:59 +01:00
microcode_core.c
driver core: add devname module aliases to allow module on-demand auto-loading
2010-05-25 15:08:26 -07:00
microcode_intel.c
x86: Improve Intel microcode loader performance
2010-03-11 13:49:06 +01:00
mmconf-fam10h_64.c
x86: Move range related operation to one file
2010-02-10 17:47:17 -08:00
module.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
mpparse.c
x86, apic: Map the local apic when parsing the MP table.
2010-08-05 16:26:42 -07:00
mrst.c
Merge branch 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2010-08-06 10:06:28 -07:00
msr.c
x86: convert cpu notifier to return encapsulate errno value
2010-05-27 09:12:48 -07:00
olpc_ofw.c
x86, olpc: Constify an olpc_ofw() arg
2010-07-30 18:02:21 -07:00
olpc.c
x86, olpc: Constify an olpc_ofw() arg
2010-07-30 18:02:21 -07:00
paravirt_patch_32.c
…
paravirt_patch_64.c
…
paravirt-spinlocks.c
locking: Convert __raw_spin* functions to arch_spin*
2009-12-14 23:55:32 +01:00
paravirt.c
x86, paravirt: Remove kmap_atomic_pte paravirt op.
2010-02-27 14:41:35 -08:00
pci-calgary_64.c
x86, Calgary: Limit the max PHB number to 256
2010-06-30 22:41:42 -07:00
pci-dma.c
x86: Detect whether we should use Xen SWIOTLB.
2010-08-02 15:18:33 -04:00
pci-gart_64.c
Merge branch 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into x86/urgent
2010-04-13 13:24:54 +02:00
pci-nommu.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
pci-swiotlb.c
x86: remove unnecessary sync_single_range_* in swiotlb_dma_ops
2010-05-27 09:12:52 -07:00
pcspeaker.c
…
pmtimer_64.c
…
probe_roms_32.c
…
process_32.c
x86, perf: Add power_end event to process_*.c cpu_idle routine
2010-06-18 11:35:10 +02:00
process_64.c
x86, perf: Add power_end event to process_*.c cpu_idle routine
2010-06-18 11:35:10 +02:00
process.c
Make do_execve() take a const filename pointer
2010-08-17 18:07:43 -07:00
ptrace.c
hw-breakpoints: Tag ptrace breakpoint as exclude_kernel
2010-05-01 04:32:07 +02:00
pvclock.c
x86, paravirt: don't compute pvclock adjustments if we trust the tsc
2010-05-19 11:41:05 +03:00
quirks.c
x86: Force HPET readback_cmp for all ATI chipsets
2010-07-15 17:10:02 +02:00
reboot_fixups_32.c
cs5535: move the DIVIL MSR definition into linux/cs5535.h
2009-12-15 08:53:28 -08:00
reboot.c
x86: Fix rebooting on Dell Precision WorkStation T7400
2010-06-20 09:24:13 +02:00
relocate_kernel_32.S
…
relocate_kernel_64.S
…
rtc.c
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-09-18 14:05:47 -07:00
scx200_32.c
…
setup_percpu.c
Fix up trivial spelling errors ('taht' -> 'that')
2010-07-21 09:25:42 -07:00
setup.c
x86-32: Separate 1:1 pagetables from swapper_pg_dir
2010-08-18 09:17:20 -07:00
sfi.c
x86, irq: Rename gsi_end gsi_top, and fix off by one errors
2010-06-09 13:34:06 -07:00
signal.c
x86: Merge sys_sigaltstack
2009-12-09 16:28:59 -08:00
smp.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
smpboot.c
x86, hotplug: Serialize CPU hotplug to avoid bringup concurrency issues
2010-08-19 14:47:43 -07:00
stacktrace.c
x86: Unify save_stack_address() and save_stack_address_nosched()
2010-06-09 17:32:19 +02:00
step.c
x86, ptrace: Fix block-step
2010-03-26 11:33:57 +01:00
sys_i386_32.c
Make do_execve() take a const filename pointer
2010-08-17 18:07:43 -07:00
sys_x86_64.c
improve sys_newuname() for compat architectures
2010-03-12 15:52:32 -08:00
syscall_64.c
…
syscall_table_32.S
x86: fix up system call numbering nit
2010-08-10 15:35:10 -07:00
tboot.c
Merge branch 'kvm-updates/2.6.35' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2010-05-21 17:16:21 -07:00
tce_64.c
…
test_nx.c
…
test_rodata.c
…
time.c
x86: Convert i8259_lock to raw_spinlock
2010-02-16 18:21:32 +01:00
tlb_uv.c
x86, UV: Initialize BAU hub map
2010-08-01 09:18:41 +02:00
tls.c
…
tls.h
…
topology.c
…
trampoline_32.S
x86: cpuinit-annotate SMP boot trampolines properly
2009-09-20 20:23:37 +02:00
trampoline_64.S
x86: Fix Suspend to RAM freeze on Acer Aspire 1511Lmi laptop
2009-10-12 18:06:48 +02:00
trampoline.c
x86-32: Separate 1:1 pagetables from swapper_pg_dir
2010-08-18 09:17:20 -07:00
traps.c
Merge branch 'perf/nmi' into perf/core
2010-08-05 08:45:05 +02:00
tsc_sync.c
locking: Convert __raw_spin* functions to arch_spin*
2009-12-14 23:55:32 +01:00
tsc.c
x86: Convert common clocksources to use clocksource_register_hz/khz
2010-07-27 12:40:55 +02:00
uv_irq.c
Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2010-05-18 09:46:35 -07:00
uv_sysfs.c
x86: Remove trailing spaces in messages
2010-02-07 17:47:51 +01:00
uv_time.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
verify_cpu_64.S
x86: Use symbolic MSR names
2010-07-21 21:23:40 -07:00
visws_quirks.c
Merge remote branch 'origin/x86/apic' into x86/mrst
2010-02-22 16:25:18 -08:00
vm86_32.c
x86, 32-bit: Convert sys_vm86 & sys_vm86old
2009-12-09 16:29:23 -08:00
vmi_32.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
vmiclock_32.c
Merge branch 'for-next' into for-linus
2010-03-08 16:55:37 +01:00
vmlinux.lds.S
Merge branch 'for-35' of git://repo.or.cz/linux-kbuild
2010-06-01 08:55:52 -07:00
vsmp_64.c
…
vsyscall_64.c
timkeeping: Fix update_vsyscall to provide wall_to_monotonic offset
2010-07-27 12:40:54 +02:00
x86_init.c
x86: Add i8042 pre-detection hook to x86_platform_ops
2010-07-07 17:05:06 -07:00
x8664_ksyms_64.c
x86-64: Don't export init_level4_pgt
2010-04-28 17:25:47 -07:00
xsave.c
Merge branch 'x86-xsave-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2010-08-06 16:25:13 -07:00