From: Xie Yuanbin <qq570070308@gmail.com>
To: arnd@arndb.de, david@redhat.com, tglx@linutronix.de,
segher@kernel.crashing.org, riel@surriel.com,
peterz@infradead.org, linux@armlinux.org.uk,
mathieu.desnoyers@efficios.com, paulmck@kernel.org,
pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu,
alex@ghiti.fr, hca@linux.ibm.com, gor@linux.ibm.com,
agordeev@linux.ibm.com, borntraeger@linux.ibm.com,
svens@linux.ibm.com, davem@davemloft.net, andreas@gaisler.com,
luto@kernel.org, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, hpa@zytor.com, acme@kernel.org,
namhyung@kernel.org, mark.rutland@arm.com,
alexander.shishkin@linux.intel.com, jolsa@kernel.org,
irogers@google.com, adrian.hunter@intel.com,
james.clark@linaro.org, anna-maria@linutronix.de,
frederic@kernel.org, juri.lelli@redhat.com,
vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
vschneid@redhat.com, nathan@kernel.org,
nick.desaulniers+lkml@gmail.com, morbo@google.com,
justinstitt@google.com, qq570070308@gmail.com, thuth@redhat.com,
brauner@kernel.org, jlayton@kernel.org, aalbersh@redhat.com,
akpm@linux-foundation.org, david@kernel.org,
lorenzo.stoakes@oracle.com, max.kellermann@ionos.com,
ryan.roberts@arm.com, nysal@linux.ibm.com, 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@kernel.org
Subject: Re: [PATCH v2 3/4] Provide the always inline version of some functions
Date: Mon, 10 Nov 2025 23:43:01 +0800 [thread overview]
Message-ID: <20251110154301.1930-1-qq570070308@gmail.com> (raw)
In-Reply-To: <a034a57e-d9f1-4c56-87f0-e9126246849d@app.fastmail.com>
On Sun, 09 Nov 2025 18:35:23 +0100, Arnd Bergmann wrote:
> 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.
Thanks, you made me aware of this attribute for the first time, it is
really a great attribute, and it has been already added to the kernel
public header. However, it's rarely used in the kernel, which I really
think is a pity.
Perhaps, I can try adding this attribute to some hot functions in
another patch. For this patch, I think this is sufficient. There are some
cold if branches inside `__schedule`, __flatten will inline the function
calls in this part of the code, which may cause some unexpected
performance degradation.
> Arnd
Xie Yuanbin
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2025-11-10 15:43 UTC|newest]
Thread overview: 13+ 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
2025-11-08 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
2025-11-10 15:43 ` Xie Yuanbin [this message]
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=20251110154301.1930-1-qq570070308@gmail.com \
--to=qq570070308@gmail.com \
--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=arnd@arndb.de \
--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=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;
as well as URLs for NNTP newsgroup(s).