Will Deacon 721c21c17a mm: mmu_gather: use tlb->end != 0 only for TLB invalidation ... When batching up address ranges for TLB invalidation, we check tlb->end != 0 to indicate that some pages have actually been unmapped. As of commit f045bbb9fa ("mmu_gather: fix over-eager tlb_flush_mmu_free() calling"), we use the same check for freeing these pages in order to avoid a performance regression where we call free_pages_and_swap_cache even when no pages are actually queued up. Unfortunately, the range could have been reset (tlb->end = 0) by tlb_end_vma, which has been shown to cause memory leaks on arm64. Furthermore, investigation into these leaks revealed that the fullmm case on task exit no longer invalidates the TLB, by virtue of tlb->end == 0 (in 3.18, need_flush would have been set). This patch resolves the problem by reverting commit f045bbb9fa, using instead tlb->local.nr as the predicate for page freeing in tlb_flush_mmu_free and ensuring that tlb->end is initialised to a non-zero value in the fullmm case. Tested-by: Mark Langsdorf <mlangsdo@redhat.com> Tested-by: Dave Hansen <dave@sr71.net> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-01-13 15:20:40 +13:00
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bitops	…
4level-fixup.h	…
Kbuild.asm	…
atomic-long.h	…
atomic.h	…
atomic64.h	…
audit_change_attr.h	…
audit_dir_write.h	…
audit_read.h	…
audit_signal.h	…
audit_write.h	…
barrier.h	arch: Add lightweight memory barriers dma_rmb() and dma_wmb()	2014-12-11 21:15:06 -05:00
bitops.h	…
bitsperlong.h	…
bug.h	…
bugs.h	…
cache.h	…
cacheflush.h	…
checksum.h	…
clkdev.h	…
cmpxchg-local.h	…
cmpxchg.h	…
cputime.h	…
cputime_jiffies.h	…
cputime_nsecs.h	…
current.h	…
delay.h	…
device.h	…
div64.h	…
dma-coherent.h	…
dma-contiguous.h	…
dma-mapping-broken.h	…
dma-mapping-common.h	…
dma.h	…
early_ioremap.h	…
emergency-restart.h	…
exec.h	…
fb.h	…
fixmap.h	…
ftrace.h	…
futex.h	asm-generic: add generic futex for !CONFIG_SMP	2014-12-08 12:55:48 +08:00
getorder.h	…
gpio.h	…
hardirq.h	…
hugetlb.h	…
hw_irq.h	…
ide_iops.h	…
int-ll64.h	…
io-64-nonatomic-hi-lo.h	…
io-64-nonatomic-lo-hi.h	…
io.h	Merge branch 'io' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into asm-generic	2014-11-11 19:55:45 +01:00
ioctl.h	…
iomap.h	…
irq.h	…
irq_regs.h	…
irq_work.h	…
irqflags.h	…
kdebug.h	…
kmap_types.h	…
kvm_para.h	…
libata-portmap.h	…
linkage.h	…
local.h	…
local64.h	…
mcs_spinlock.h	…
memory_model.h	…
mm_hooks.h	mm: Make arch_unmap()/bprm_mm_init() available to all architectures	2014-11-19 11:54:13 +01:00
mmu.h	…
mmu_context.h	asm-generic: Remove asm-generic arch_bprm_mm_init()	2014-11-22 21:52:08 +01:00
module.h	…
msi.h	asm-generic: Add msi.h	2014-11-23 13:01:47 +01:00
mutex-dec.h	…
mutex-null.h	…
mutex-xchg.h	…
mutex.h	…
page.h	…
param.h	…
parport.h	…
pci-bridge.h	…
pci-dma-compat.h	…
pci.h	…
pci_iomap.h	…
percpu.h	…
pgalloc.h	…
pgtable-nopmd.h	…
pgtable-nopud.h	…
pgtable.h	s390/mm: pmdp_get_and_clear_full optimization	2014-10-27 13:27:30 +01:00
preempt.h	sched: Kill task_preempt_count()	2014-10-28 10:47:56 +01:00
ptrace.h	…
qrwlock.h	…
qrwlock_types.h	…
resource.h	…
rtc.h	…
rwsem.h	…
scatterlist.h	…
seccomp.h	asm-generic: add generic seccomp.h for secure computing mode 1	2014-11-28 10:24:58 +00:00
sections.h	…
segment.h	…
serial.h	…
siginfo.h	…
signal.h	…
simd.h	…
sizes.h	…
spinlock.h	…
statfs.h	…
string.h	…
switch_to.h	…
syscall.h	…
syscalls.h	…
termios-base.h	…
termios.h	…
timex.h	…
tlb.h	mm: mmu_gather: use tlb->end != 0 only for TLB invalidation	2015-01-13 15:20:40 +13:00
tlbflush.h	…
topology.h	…
trace_clock.h	…
uaccess-unaligned.h	…
uaccess.h	…
unaligned.h	…
unistd.h	…
user.h	…
vga.h	…
vmlinux.lds.h	iommu: provide early initialisation hook for IOMMU drivers	2014-12-01 16:47:46 +00:00
vtime.h	…
word-at-a-time.h	…
xor.h	…