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23 October 2021, 00:29:24 UTC
Revision 928501344fc645f80390afc12708c81b3595745d authored by Andrey Konovalov on 26 February 2021, 01:19:55 UTC, committed by Linus Torvalds on 26 February 2021, 17:41:02 UTC 
kasan, mm: don't save alloc stacks twice
 
Patch series "kasan: optimizations and fixes for HW_TAGS", v4.

This patchset makes the HW_TAGS mode more efficient, mostly by reworking
poisoning approaches and simplifying/inlining some internal helpers.

With this change, the overhead of HW_TAGS annotations excluding setting
and checking memory tags is ~3%.  The performance impact caused by tags
will be unknown until we have hardware that supports MTE.

As a side-effect, this patchset speeds up generic KASAN by ~15%.

This patch (of 13):

Currently KASAN saves allocation stacks in both kasan_slab_alloc() and
kasan_kmalloc() annotations.  This patch changes KASAN to save allocation
stacks for slab objects from kmalloc caches in kasan_kmalloc() only, and
stacks for other slab objects in kasan_slab_alloc() only.

This change requires ____kasan_kmalloc() knowing whether the object
belongs to a kmalloc cache.  This is implemented by adding a flag field to
the kasan_info structure.  That flag is only set for kmalloc caches via a
new kasan_cache_create_kmalloc() annotation.

Link: https://lkml.kernel.org/r/cover.1612546384.git.andreyknvl@google.com
Link: https://lkml.kernel.org/r/7c673ebca8d00f40a7ad6f04ab9a2bddeeae2097.1612546384.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Branislav Rankov <Branislav.Rankov@arm.com>
Cc: Kevin Brodsky <kevin.brodsky@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent d3a61f7
Raw File
Tip revision: 928501344fc645f80390afc12708c81b3595745d authored by Andrey Konovalov on 26 February 2021, 01:19:55 UTC
kasan, mm: don't save alloc stacks twice
Tip revision: 9285013
Makefile 
# SPDX-License-Identifier: GPL-2.0
#
# Makefile for ALSA
# Copyright (c) 2001 by Jaroslav Kysela <perex@perex.cz>
#

snd-ad1889-objs := ad1889.o
snd-als300-objs := als300.o
snd-als4000-objs := als4000.o
snd-atiixp-objs := atiixp.o
snd-atiixp-modem-objs := atiixp_modem.o
snd-azt3328-objs := azt3328.o
snd-bt87x-objs := bt87x.o
snd-cmipci-objs := cmipci.o
snd-cs4281-objs := cs4281.o
snd-cs5530-objs := cs5530.o
snd-ens1370-objs := ens1370.o ak4531_codec.o
snd-ens1371-objs := ens1371.o
snd-es1938-objs := es1938.o
snd-es1968-objs := es1968.o
snd-fm801-objs := fm801.o
snd-intel8x0-objs := intel8x0.o
snd-intel8x0m-objs := intel8x0m.o
snd-maestro3-objs := maestro3.o
snd-rme32-objs := rme32.o
snd-rme96-objs := rme96.o
snd-sis7019-objs := sis7019.o
snd-sonicvibes-objs := sonicvibes.o
snd-via82xx-objs := via82xx.o
snd-via82xx-modem-objs := via82xx_modem.o

# Toplevel Module Dependency
obj-$(CONFIG_SND_AD1889) += snd-ad1889.o
obj-$(CONFIG_SND_ALS300) += snd-als300.o
obj-$(CONFIG_SND_ALS4000) += snd-als4000.o
obj-$(CONFIG_SND_ATIIXP) += snd-atiixp.o
obj-$(CONFIG_SND_ATIIXP_MODEM) += snd-atiixp-modem.o
obj-$(CONFIG_SND_AZT3328) += snd-azt3328.o
obj-$(CONFIG_SND_BT87X) += snd-bt87x.o
obj-$(CONFIG_SND_CMIPCI) += snd-cmipci.o
obj-$(CONFIG_SND_CS4281) += snd-cs4281.o
obj-$(CONFIG_SND_CS5530) += snd-cs5530.o
obj-$(CONFIG_SND_ENS1370) += snd-ens1370.o
obj-$(CONFIG_SND_ENS1371) += snd-ens1371.o
obj-$(CONFIG_SND_ES1938) += snd-es1938.o
obj-$(CONFIG_SND_ES1968) += snd-es1968.o
obj-$(CONFIG_SND_FM801) += snd-fm801.o
obj-$(CONFIG_SND_INTEL8X0) += snd-intel8x0.o
obj-$(CONFIG_SND_INTEL8X0M) += snd-intel8x0m.o
obj-$(CONFIG_SND_MAESTRO3) += snd-maestro3.o
obj-$(CONFIG_SND_RME32) += snd-rme32.o
obj-$(CONFIG_SND_RME96) += snd-rme96.o
obj-$(CONFIG_SND_SIS7019) += snd-sis7019.o
obj-$(CONFIG_SND_SONICVIBES) += snd-sonicvibes.o
obj-$(CONFIG_SND_VIA82XX) += snd-via82xx.o
obj-$(CONFIG_SND_VIA82XX_MODEM) += snd-via82xx-modem.o

obj-$(CONFIG_SND) += \
	ac97/ \
	ali5451/ \
	asihpi/ \
	au88x0/ \
	aw2/ \
	ctxfi/ \
	ca0106/ \
	cs46xx/ \
	cs5535audio/ \
	lola/ \
	lx6464es/ \
	echoaudio/ \
	emu10k1/ \
	hda/ \
	ice1712/ \
	korg1212/ \
	mixart/ \
	nm256/ \
	oxygen/ \
	pcxhr/ \
	riptide/ \
	rme9652/ \
	trident/ \
	ymfpci/ \
	vx222/
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