From: "Arnd Bergmann" <arnd@arndb.de>
To: "Xie Yuanbin" <qq570070308@gmail.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"David Hildenbrand" <david@redhat.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Segher Boessenkool" <segher@kernel.crashing.org>,
riel@surriel.com, "Russell King" <linux@armlinux.org.uk>,
"Mathieu Desnoyers" <mathieu.desnoyers@efficios.com>,
"Paul E. McKenney" <paulmck@kernel.org>,
pjw@kernel.org, "Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Alexandre Ghiti" <alex@ghiti.fr>,
"Heiko Carstens" <hca@linux.ibm.com>,
gor@linux.ibm.com, "Alexander Gordeev" <agordeev@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>,
"Sven Schnelle" <svens@linux.ibm.com>,
"David S . Miller" <davem@davemloft.net>,
"Andreas Larsson" <andreas@gaisler.com>,
"Andy Lutomirski" <luto@kernel.org>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Arnaldo Carvalho de Melo" <acme@kernel.org>,
"Namhyung Kim" <namhyung@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Alexander Shishkin" <alexander.shishkin@linux.intel.com>,
"Jiri Olsa" <jolsa@kernel.org>, "Ian Rogers" <irogers@google.com>,
"Adrian Hunter" <adrian.hunter@intel.com>,
"James Clark" <james.clark@linaro.org>,
"Anna-Maria Gleixner" <anna-maria@linutronix.de>,
"Frederic Weisbecker" <frederic@kernel.org>,
"Juri Lelli" <juri.lelli@redhat.com>,
"Vincent Guittot" <vincent.guittot@linaro.org>,
"Dietmar Eggemann" <dietmar.eggemann@arm.com>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Benjamin Segall" <bsegall@google.com>,
"Mel Gorman" <mgorman@suse.de>,
"Valentin Schneider" <vschneid@redhat.com>,
"Nathan Chancellor" <nathan@kernel.org>,
"Nick Desaulniers" <nick.desaulniers+lkml@gmail.com>,
"Bill Wendling" <morbo@google.com>,
"Justin Stitt" <justinstitt@google.com>,
"Thomas Huth" <thuth@redhat.com>,
"Christian Brauner" <brauner@kernel.org>,
"Jeff Layton" <jlayton@kernel.org>,
"Andrey Albershteyn" <aalbersh@redhat.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
david@kernel.org, "Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
max.kellermann@ionos.com, "Ryan Roberts" <ryan.roberts@arm.com>,
nysal@linux.ibm.com, "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Cc: x86@kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-s390@vger.kernel.org, sparclinux@vger.kernel.org,
linux-perf-users@vger.kernel.org, llvm@lists.linux.dev,
"Will Deacon" <will@kernel.org>
Subject: Re: [PATCH v2 3/4] Provide the always inline version of some functions
Date: Sun, 09 Nov 2025 18:35:23 +0100 [thread overview]
Message-ID: <a034a57e-d9f1-4c56-87f0-e9126246849d@app.fastmail.com> (raw)
In-Reply-To: <20251109170402.145012-1-qq570070308@gmail.com>
On Sun, Nov 9, 2025, at 18:04, Xie Yuanbin wrote:
> On Sun, 9 Nov 2025 12:31:52 +0100, Peter Zijlstra wrote:
> Adding the always-inline version of these functions can provide better
> guidance for compiler optimization, but it does indeed lead to more
> complex code.
> The best solution may be to prompt the compiler to always inline at a
> specific calling point through some keyword.
> I noticed that there are also people discussing this issue on stackerflow
> , but it seems that the current compiler does not have such a feature.
> Link: https://stackoverflow.com/questions/14571593
You can mark the caller as __attribute__((flatten)) to force all
functions to be inlined into that one if possible. I don't know
if that would be helpful or desired here though.
Arnd
next prev parent reply other threads:[~2025-11-09 17:35 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-08 17:23 [PATCH v2 0/4] Optimize code generation during context switching Xie Yuanbin
2025-11-08 17:23 ` [PATCH v2 1/4] Make enter_lazy_tlb inline on x86 Xie Yuanbin
2025-11-09 14:42 ` kernel test robot
2025-11-08 17:23 ` [PATCH v2 2/4] Make raw_spin_rq_unlock inline Xie Yuanbin
2025-11-08 17:23 ` [PATCH v2 3/4] Provide the always inline version of some functions Xie Yuanbin
2025-11-08 22:14 ` H. Peter Anvin
2025-11-09 11:51 ` Peter Zijlstra
2025-11-10 23:21 ` H. Peter Anvin
2025-11-09 11:31 ` Peter Zijlstra
2025-11-09 17:04 ` Xie Yuanbin
2025-11-09 17:35 ` Arnd Bergmann [this message]
2025-11-10 15:43 ` Xie Yuanbin
2025-11-08 17:23 ` [PATCH v2 4/4] Make finish_task_switch and its subfuncs inline in context switching Xie Yuanbin
2025-11-09 11:35 ` Peter Zijlstra
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=a034a57e-d9f1-4c56-87f0-e9126246849d@app.fastmail.com \
--to=arnd@arndb.de \
--cc=aalbersh@redhat.com \
--cc=acme@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=agordeev@linux.ibm.com \
--cc=akpm@linux-foundation.org \
--cc=alex@ghiti.fr \
--cc=alexander.shishkin@linux.intel.com \
--cc=andreas@gaisler.com \
--cc=anna-maria@linutronix.de \
--cc=aou@eecs.berkeley.edu \
--cc=borntraeger@linux.ibm.com \
--cc=bp@alien8.de \
--cc=brauner@kernel.org \
--cc=bsegall@google.com \
--cc=dave.hansen@linux.intel.com \
--cc=davem@davemloft.net \
--cc=david@kernel.org \
--cc=david@redhat.com \
--cc=dietmar.eggemann@arm.com \
--cc=frederic@kernel.org \
--cc=gor@linux.ibm.com \
--cc=hca@linux.ibm.com \
--cc=hpa@zytor.com \
--cc=irogers@google.com \
--cc=james.clark@linaro.org \
--cc=jlayton@kernel.org \
--cc=jolsa@kernel.org \
--cc=juri.lelli@redhat.com \
--cc=justinstitt@google.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-perf-users@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=llvm@lists.linux.dev \
--cc=lorenzo.stoakes@oracle.com \
--cc=luto@kernel.org \
--cc=mark.rutland@arm.com \
--cc=mathieu.desnoyers@efficios.com \
--cc=max.kellermann@ionos.com \
--cc=mgorman@suse.de \
--cc=mingo@redhat.com \
--cc=morbo@google.com \
--cc=namhyung@kernel.org \
--cc=nathan@kernel.org \
--cc=nick.desaulniers+lkml@gmail.com \
--cc=nysal@linux.ibm.com \
--cc=palmer@dabbelt.com \
--cc=paulmck@kernel.org \
--cc=peterz@infradead.org \
--cc=pjw@kernel.org \
--cc=qq570070308@gmail.com \
--cc=riel@surriel.com \
--cc=rostedt@goodmis.org \
--cc=ryan.roberts@arm.com \
--cc=segher@kernel.crashing.org \
--cc=sparclinux@vger.kernel.org \
--cc=svens@linux.ibm.com \
--cc=tglx@linutronix.de \
--cc=thuth@redhat.com \
--cc=urezki@gmail.com \
--cc=vincent.guittot@linaro.org \
--cc=vschneid@redhat.com \
--cc=will@kernel.org \
--cc=x86@kernel.org \
/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