From: Andrew Morton <akpm@linux-foundation.org>
To: Andrey Konovalov <andreyknvl@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Christoph Lameter <cl@linux.com>,
Mark Rutland <mark.rutland@arm.com>,
Nick Desaulniers <ndesaulniers@google.com>,
Marc Zyngier <marc.zyngier@arm.com>,
Dave Martin <dave.martin@arm.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
"Eric W . Biederman" <ebiederm@xmission.com>,
Ingo Molnar <mingo@kernel.org>,
Paul Lawrence <paullawrence@google.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Arnd Bergmann <arnd@arndb.de>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Kate Stewart <kstewart@linuxfoundation.org>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
kasan-dev <kasan-dev@googlegroups.com>,
linux-doc@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
linux-sparse@vger.kernel.org,
Linux Memory Management List <linux-mm@kvack.org>,
Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
Kostya Serebryany <kcc@google.com>,
Evgeniy Stepanov <eugenis@google.com>,
Lee Smith <Lee.Smith@arm.com>,
Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>,
Jacob Bramley <Jacob.Bramley@arm.com>,
Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>,
Jann Horn <jannh@google.com>, Mark Brand <markbrand@google.com>,
Chintan Pandya <cpandya@codeaurora.org>
Subject: Re: [PATCH v4 00/17] khwasan: kernel hardware assisted address sanitizer
Date: Thu, 28 Jun 2018 12:40:39 -0700 [thread overview]
Message-ID: <20180628124039.8a42ab5e2994fb2876ff4f75@linux-foundation.org> (raw)
In-Reply-To: <CAAeHK+xz552VNpZxgWwU-hbTqF5_F6YVDw3fSv=4OT8mNrqPzg@mail.gmail.com>
On Thu, 28 Jun 2018 20:29:07 +0200 Andrey Konovalov <andreyknvl@google.com> wrote:
> >> Slab memory usage after boot [2]:
> >> * ~40 kb for clean kernel
> >> * ~105 kb + 1/8th shadow ~= 118 kb for KASAN
> >> * ~47 kb + 1/16th shadow ~= 50 kb for KHWASAN
> >>
> >> Network performance [3]:
> >> * 8.33 Gbits/sec for clean kernel
> >> * 3.17 Gbits/sec for KASAN
> >> * 2.85 Gbits/sec for KHWASAN
> >>
> >> Note, that KHWASAN (compared to KASAN) doesn't require quarantine.
> >>
> >> [1] Time before the ext4 driver is initialized.
> >> [2] Measured as `cat /proc/meminfo | grep Slab`.
> >> [3] Measured as `iperf -s & iperf -c 127.0.0.1 -t 30`.
> >
> > The above doesn't actually demonstrate the whole point of the
> > patchset: to reduce KASAN's very high memory consumption?
>
> You mean that memory usage numbers collected after boot don't give a
> representative picture of actual memory consumption on real workloads?
>
> What kind of memory consumption testing would you like to see?
Well, 100kb or so is a teeny amount on virtually any machine. I'm
assuming the savings are (much) more significant once the machine gets
loaded up and doing work?
next prev parent reply other threads:[~2018-06-28 19:40 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-26 13:15 [PATCH v4 00/17] khwasan: kernel hardware assisted address sanitizer Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 01/17] khwasan, mm: change kasan hooks signatures Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 02/17] khwasan: move common kasan and khwasan code to common.c Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 03/17] khwasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_HW Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 04/17] khwasan, arm64: adjust shadow size for CONFIG_KASAN_HW Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 05/17] khwasan: initialize shadow to 0xff Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 06/17] khwasan, arm64: untag virt address in __kimg_to_phys and _virt_addr_is_linear Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 07/17] khwasan: add tag related helper functions Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 08/17] khwasan, arm64: fix up fault handling logic Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 09/17] khwasan, arm64: enable top byte ignore for the kernel Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 10/17] khwasan, mm: perform untagged pointers comparison in krealloc Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 11/17] khwasan: split out kasan_report.c from report.c Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 12/17] khwasan: add bug reporting routines Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 13/17] khwasan: add hooks implementation Andrey Konovalov
2018-07-25 13:44 ` Vincenzo Frascino@Foss
2018-07-31 13:05 ` Andrey Konovalov
2018-07-31 14:50 ` Andrey Ryabinin
2018-07-31 15:03 ` Dmitry Vyukov
2018-07-31 15:38 ` Christopher Lameter
2018-07-31 16:03 ` Dmitry Vyukov
2018-07-31 16:04 ` Andrey Ryabinin
2018-07-31 16:08 ` Dmitry Vyukov
2018-07-31 16:18 ` Andrey Ryabinin
2018-07-31 15:21 ` Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 14/17] khwasan, arm64: add brk handler for inline instrumentation Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 15/17] khwasan, mm, arm64: tag non slab memory allocated via pagealloc Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 16/17] khwasan: update kasan documentation Andrey Konovalov
2018-06-26 13:15 ` [PATCH v4 17/17] kasan: add SPDX-License-Identifier mark to source files Andrey Konovalov
2018-06-27 23:08 ` [PATCH v4 00/17] khwasan: kernel hardware assisted address sanitizer Andrew Morton
2018-06-28 0:04 ` Kostya Serebryany
[not found] ` <CAEZpscCcP6=O_OCqSwW8Y6u9Ee99SzWN+hRcgpP2tK=OEBFnNw@mail.gmail.com>
2018-06-28 1:11 ` Andrew Morton
2018-06-28 18:26 ` Andrey Konovalov
2018-06-28 7:01 ` Geert Uytterhoeven
2018-07-02 20:33 ` Matthew Wilcox
2018-07-02 23:39 ` Evgenii Stepanov
2018-06-28 18:29 ` Andrey Konovalov
2018-06-28 19:40 ` Andrew Morton [this message]
2018-06-29 12:45 ` Andrey Konovalov
2018-06-29 13:01 ` Mark Rutland
2018-06-29 14:40 ` Andrey Konovalov
2018-06-30 2:41 ` Andrew Morton
2018-07-02 19:16 ` Evgenii Stepanov
2018-07-02 19:21 ` Andrew Morton
2018-07-02 20:22 ` Evgenii Stepanov
2018-07-02 20:30 ` Andrew Morton
2018-06-28 10:51 ` Dave Martin
2018-06-28 18:56 ` Andrey Konovalov
2018-06-29 10:14 ` Mark Rutland
2018-06-29 11:04 ` Dave Martin
2018-06-29 11:26 ` Luc Van Oostenryck
2018-06-29 13:18 ` Andrey Konovalov
2018-06-29 13:42 ` Dan Carpenter
2018-06-29 11:07 ` Catalin Marinas
2018-06-29 11:07 ` Will Deacon
2018-06-29 16:36 ` Andrey Konovalov
2018-07-03 17:36 ` Will Deacon
2018-07-18 17:16 ` Andrey Konovalov
2018-07-31 13:22 ` Andrey Konovalov
2018-08-01 16:35 ` Will Deacon
2018-08-01 16:52 ` Dmitry Vyukov
2018-08-02 11:10 ` Catalin Marinas
2018-08-02 11:36 ` Dmitry Vyukov
2018-08-02 13:52 ` Catalin Marinas
2018-08-02 14:11 ` Andrey Ryabinin
2018-08-03 9:23 ` Will Deacon
2018-08-03 9:42 ` Dmitry Vyukov
2018-08-08 16:27 ` Will Deacon
2018-08-08 16:53 ` Dmitry Vyukov
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