From: Andi Kleen <ak@linux.intel.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Arnd Bergmann <arnd@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Bill Wendling <morbo@google.com>,
Justin Stitt <justinstitt@google.com>,
Kees Cook <keescook@chromium.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
llvm@lists.linux.dev
Subject: Re: [PATCH] fs/select: rework stack allocation hack for clang
Date: Sun, 18 Feb 2024 18:28:29 -0800 [thread overview]
Message-ID: <ZdK8zaBic5NNbYNw@tassilo> (raw)
In-Reply-To: <3a829098-612b-4e5a-bcec-3727acee7ff8@app.fastmail.com>
On Sun, Feb 18, 2024 at 11:29:32AM +0100, Arnd Bergmann wrote:
> On Sun, Feb 18, 2024, at 11:19, Andi Kleen wrote:
> > I suspect given the larger default stack now we could maybe just increase the
> > warning limit too, but that should be fine.
>
> I don't think we have increased the default stack size in decades,
> it's still 8KB on almost all 32-bit architectures (sh, hexagon and m68k
> still allow 4KB stacks, but that's probably broken). I would actually
> like to (optionally) reduce the stack size for 64-bit machines
> from 16KB to 12KB now that it's always vmapped.
now == after 4/8K.
The 1024 warning limit dates back to the 4/8K times. It could
be certainly reevaluated for this decade's setup.
-Andi
next prev parent reply other threads:[~2024-02-19 2:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-16 20:23 [PATCH] fs/select: rework stack allocation hack for clang Arnd Bergmann
2024-02-16 21:21 ` Kees Cook
2024-02-18 10:19 ` Andi Kleen
2024-02-18 10:29 ` Arnd Bergmann
2024-02-19 2:28 ` Andi Kleen [this message]
2024-02-19 19:35 ` David Laight
2024-02-19 11:34 ` Jan Kara
2024-02-20 8:24 ` Christian Brauner
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