From: Peter Zijlstra <peterz@infradead.org>
To: Eric Dumazet <edumazet@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH] entry: always inline local_irq_{enable,disable}_exit_to_user()
Date: Fri, 5 Dec 2025 11:51:23 +0100 [thread overview]
Message-ID: <20251205105123.GS2528459@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <20251204153127.1321824-1-edumazet@google.com>
On Thu, Dec 04, 2025 at 03:31:27PM +0000, Eric Dumazet wrote:
> clang needs __always_inline instead of inline, even for tiny helpers.
>
> This saves some cycles in system call fast path, and saves 195 bytes
> on x86_64 build:
>
> $ size vmlinux.before vmlinux.after
> text data bss dec hex filename
> 34652814 22291961 5875180 62819955 3be8e73 vmlinux.before
> 34652619 22291961 5875180 62819760 3be8db0 vmlinux.after
>
> Signed-off-by: Eric Dumazet <edumazet@google.com>
Yeah, sometimes these inline heuristics drive me mad. I've picked up
this and the rseq one. I'll do something with them after rc1.
next prev parent reply other threads:[~2025-12-05 10:51 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-04 15:31 Eric Dumazet
2025-12-05 10:51 ` Peter Zijlstra [this message]
2025-12-05 10:54 ` Eric Dumazet
2025-12-05 12:45 ` Peter Zijlstra
2025-12-05 13:03 ` Eric Dumazet
2025-12-05 15:10 ` Peter Zijlstra
2025-12-18 9:45 ` [tip: core/urgent] entry: Always " tip-bot2 for Eric Dumazet
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20251205105123.GS2528459@noisy.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=edumazet@google.com \
--cc=eric.dumazet@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®