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
..
acpi	ACPI / processor: Convert apic_id to phys_id to make it arch agnostic	2015-01-05 23:32:42 +01:00
asm-generic	mm: mmu_gather: use tlb->end != 0 only for TLB invalidation	2015-01-13 15:20:40 +13:00
clocksource
crypto	crypto: af_alg - add user space interface for AEAD	2014-12-05 23:56:55 +08:00
drm	Revert "drm/gem: Warn on illegal use of the dumb buffer interface v2"	2014-12-24 13:13:22 +10:00
dt-bindings	Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal into thermal-soc	2014-12-21 22:49:12 +08:00
keys
kvm	arm/arm64: KVM: Require in-kernel vgic for the arch timers	2014-12-15 11:50:42 +01:00
linux	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-01-11 11:47:45 -08:00
math-emu
media	[media] media: v4l2-image-sizes.h: correct the SVGA height definition	2014-12-04 13:56:56 -02:00
memory
misc
net	Here's just a single fix - a revert of a patch that broke the	2015-01-06 13:29:27 -05:00
pcmcia
ras
rdma	IB/core: Implement support for MMU notifiers regarding on demand paging regions	2014-12-15 18:13:36 -08:00
rxrpc
scsi	SCSI for-linus on 20141220	2014-12-20 13:42:57 -08:00
soc	Merge branch 'at91/cleanup5' into next/drivers	2014-12-08 18:29:20 +01:00
sound	ALSA: pcm: Fix kerneldoc for params_*() functions	2014-12-30 16:41:11 +01:00
target	SCSI for-linus on 20141220	2014-12-20 13:42:57 -08:00
trace	SCSI for-linus on 20141220	2014-12-20 13:42:57 -08:00
uapi	Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux	2015-01-09 21:13:34 -08:00
video	OMAPDSS: Remove all references to obsolete HDMI audio callbacks	2014-12-01 11:09:59 +02:00
xen	xen/arm: introduce GNTTABOP_cache_flush	2014-12-04 12:41:54 +00:00
Kbuild