From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Dmitry Vyukov <dvyukov@google.com>, Arnd Bergmann <arnd@arndb.de>,
Krzysztof Kozlowski <krzk@kernel.org>,
syzkaller <syzkaller@googlegroups.com>,
kasan-dev <kasan-dev@googlegroups.com>,
Hailong Liu <liu.hailong6@zte.com.cn>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: Arm + KASAN + syzbot
Date: Thu, 11 Mar 2021 14:09:04 +0000 [thread overview]
Message-ID: <20210311140904.GJ1463@shell.armlinux.org.uk> (raw)
In-Reply-To: <CACRpkda1pJpMif6Xt2JHseYQP6NWDmwwgm9pVCPnSAoeARTT9Q@mail.gmail.com>
On Thu, Mar 11, 2021 at 02:55:54PM +0100, Linus Walleij wrote:
> On Thu, Mar 11, 2021 at 11:54 AM Dmitry Vyukov <dvyukov@google.com> wrote:
> > The instance has KASAN disabled because Go binaries don't run on KASAN kernel:
> > https://lore.kernel.org/linux-arm-kernel/CACT4Y+YdJoNTqnBSELcEbcbVsKBtJfYUc7_GSXbUQfAJN3JyRg@mail.gmail.com/
>
> I am still puzzled by this, but I still have the open question about how much
> memory the Go runtime really use. I am suspecting quite a lot, and the
> ARM32 instance isn't on par with any contemporary server or desktop
> when it comes to memory, it has ~2GB for a userspace program, after
> that bad things will happen: the machine will start thrashing.
I believe grafana is a Go binary - I run this in a VM with only 1G
of memory and no swap along with apache. It's happy enough.
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
grafana 1122 0.0 5.9 920344 60484 ? Ssl Feb18 28:31 /usr/sbin/grafana-server --config=/etc/grafana/grafana.ini ...
So, I suspect it's basically KASAN upsetting Go somehow that then
causes the memory usage to spiral out of control.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
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next prev parent reply other threads:[~2021-03-11 14:10 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-18 16:31 Arm + KASAN + syzbot Dmitry Vyukov
2021-01-19 8:36 ` Krzysztof Kozlowski
2021-01-19 8:46 ` Linus Walleij
2021-01-19 10:04 ` Dmitry Vyukov
2021-01-19 10:17 ` Linus Walleij
2021-01-19 10:23 ` Dmitry Vyukov
2021-01-19 10:28 ` Linus Walleij
2021-01-19 10:53 ` Dmitry Vyukov
2021-01-19 11:05 ` Dmitry Vyukov
2021-01-19 11:13 ` Russell King - ARM Linux admin
2021-01-19 11:17 ` Dmitry Vyukov
2021-01-19 11:43 ` Russell King - ARM Linux admin
2021-01-19 12:05 ` Dmitry Vyukov
2021-01-19 12:36 ` Russell King - ARM Linux admin
2021-01-19 18:57 ` Dmitry Vyukov
2021-01-19 19:48 ` Russell King - ARM Linux admin
2021-01-21 13:14 ` Russell King - ARM Linux admin
2021-01-21 13:49 ` Dmitry Vyukov
2021-01-21 14:04 ` Arnd Bergmann
2021-01-21 13:59 ` Dmitry Vyukov
2021-01-21 14:52 ` Linus Walleij
2021-01-26 21:24 ` Dmitry Vyukov
2021-01-27 8:24 ` Linus Walleij
2021-01-27 9:39 ` Dmitry Vyukov
2021-01-27 9:57 ` Linus Walleij
2021-01-27 10:12 ` Dmitry Vyukov
2021-01-27 10:19 ` Russell King - ARM Linux admin
2021-03-11 10:54 ` Dmitry Vyukov
2021-03-11 13:42 ` Russell King - ARM Linux admin
2021-03-11 18:05 ` Dmitry Vyukov
2021-03-11 13:55 ` Linus Walleij
2021-03-11 14:09 ` Russell King - ARM Linux admin [this message]
2021-03-11 14:37 ` Linus Walleij
2021-03-11 14:55 ` Arnd Bergmann
2021-03-11 18:08 ` Dmitry Vyukov
2021-03-15 14:01 ` Linus Walleij
2021-03-15 19:03 ` Russell King - ARM Linux admin
2021-01-19 13:22 ` Linus Walleij
2021-01-19 8:41 ` Linus Walleij
2021-01-19 8:43 ` Linus Walleij
2021-01-19 10:18 ` Dmitry Vyukov
2021-01-19 10:27 ` Linus Walleij
2021-01-19 10:36 ` Dmitry Vyukov
2021-01-19 10:03 ` Mark Rutland
2021-01-19 10:34 ` Dmitry Vyukov
2021-01-19 10:55 ` Russell King - ARM Linux admin
2021-01-19 13:00 ` Mark Rutland
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