From: Guo Ren <guoren@kernel.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: "Palmer Dabbelt" <palmer@rivosinc.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Peter Zijlstra" <peterz@infradead.org>,
"Andy Lutomirski" <luto@kernel.org>,
"Conor.Dooley" <conor.dooley@microchip.com>,
"Heiko Stübner" <heiko@sntech.de>,
"Jisheng Zhang" <jszhang@kernel.org>,
lazyparser@gmail.com, falcon@tinylab.org,
"Huacai Chen" <chenhuacai@kernel.org>,
"Anup Patel" <apatel@ventanamicro.com>,
"Atish Patra" <atishp@atishpatra.org>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Sebastian Andrzej Siewior" <bigeasy@linutronix.de>,
Linux-Arch <linux-arch@vger.kernel.org>,
linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
"Guo Ren" <guoren@linux.alibaba.com>,
"Andreas Schwab" <schwab@suse.de>
Subject: Re: [PATCH V4 8/8] riscv: Add config of thread stack size
Date: Wed, 21 Sep 2022 14:13:31 +0800 [thread overview]
Message-ID: <CAJF2gTSvaNh_m_hrub5Z=kqLAYJfRbpYzB1Mc5aOgdN+Bm8bag@mail.gmail.com> (raw)
In-Reply-To: <7a2379cf-c1cf-46af-9172-334d2b9b88d5@www.fastmail.com>
On Tue, Sep 20, 2022 at 3:18 PM Arnd Bergmann <arnd@arndb.de> wrote:
>
> On Tue, Sep 20, 2022, at 2:46 AM, Guo Ren wrote:
>
> > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> > index dfe600f3526c..8def456f328c 100644
> > --- a/arch/riscv/Kconfig
> > +++ b/arch/riscv/Kconfig
> > @@ -442,6 +442,16 @@ config IRQ_STACKS
> > Add independent irq & softirq stacks for percpu to prevent
> > kernel stack
> > overflows. We may save some memory footprint by disabling IRQ_STACKS.
> >
> > +config THREAD_SIZE
> > + int "Kernel stack size (in bytes)" if EXPERT
> > + range 4096 65536
> > + default 8192 if 32BIT && !KASAN
> > + default 32768 if 64BIT && KASAN
> > + default 16384
> > + help
> > + Specify the Pages of thread stack size (from 4KB to 64KB), which also
> > + affects irq stack size, which is equal to thread stack size.
>
> I still think this should be guarded in a way that prevents
> setting the stack to smaller than default values unless VMAP_STACK
> is set as well.
Current VMAP_STACK would double THREAD_SIZE. Let me see how to reduce
the VMAP_STACK.
>
> Arnd
--
Best Regards
Guo Ren
next prev parent reply other threads:[~2022-09-21 6:13 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-08 2:24 [PATCH V4 0/9] riscv: Add GENERIC_ENTRY, irq stack support guoren
2022-09-08 2:24 ` [PATCH V4 1/8] riscv: elf_kexec: Fixup compile warning guoren
2022-09-08 2:25 ` [PATCH V4 2/8] riscv: compat_syscall_table: " guoren
2022-09-08 2:25 ` [PATCH V4 3/8] riscv: ptrace: Remove duplicate operation guoren
2022-09-08 2:25 ` [PATCH V4 4/8] riscv: traps: Add noinstr to prevent instrumentation inserted guoren
2022-09-08 7:33 ` Peter Zijlstra
2022-09-10 9:17 ` Guo Ren
2022-09-10 12:46 ` Guo Ren
2022-09-11 15:09 ` Peter Zijlstra
2022-09-11 16:20 ` Guo Ren
2022-09-08 2:25 ` [PATCH V4 5/8] riscv: convert to generic entry guoren
2022-09-15 13:50 ` Yipeng Zou
2022-09-08 2:25 ` [PATCH V4 6/8] riscv: Support HAVE_IRQ_EXIT_ON_IRQ_STACK guoren
2022-09-08 16:08 ` Sebastian Andrzej Siewior
2022-09-09 7:30 ` David Laight
2022-09-11 1:13 ` Guo Ren
2022-09-08 2:25 ` [PATCH V4 7/8] riscv: Support HAVE_SOFTIRQ_ON_OWN_STACK guoren
2022-09-08 16:01 ` Sebastian Andrzej Siewior
2022-09-18 15:42 ` Guo Ren
2022-09-08 2:25 ` [PATCH V4 8/8] riscv: Add config of thread stack size guoren
2022-09-08 7:35 ` Arnd Bergmann
2022-09-10 12:52 ` Guo Ren
2022-09-10 16:06 ` Arnd Bergmann
2022-09-10 23:35 ` Guo Ren
2022-09-11 18:39 ` Arnd Bergmann
2022-09-12 4:14 ` Guo Ren
2022-09-12 8:23 ` Arnd Bergmann
2022-09-19 8:38 ` Guo Ren
2022-09-19 8:35 ` Guo Ren
2022-09-20 0:46 ` Guo Ren
2022-09-20 7:15 ` Arnd Bergmann
2022-09-21 6:11 ` Guo Ren
2022-09-20 7:17 ` Arnd Bergmann
2022-09-21 6:13 ` Guo Ren [this message]
2022-09-21 8:23 ` Guo Ren
2022-09-21 10:31 ` Guo Ren
2022-09-21 10:46 ` Guo Ren
2022-09-22 5:55 ` Arnd Bergmann
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