From: Alexander Gordeev <agordeev@linux.ibm.com>
To: Heiko Carstens <hca@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Juergen Christ <jchrist@linux.ibm.com>,
linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: Re: [PATCH v5 7/7] s390/percpu: Provide arch_this_cpu_write() implementation
Date: Tue, 2 Jun 2026 13:40:32 +0200 [thread overview]
Message-ID: <032b0b0e-409b-4f0a-9958-5d4196a5b655-agordeev@linux.ibm.com> (raw)
In-Reply-To: <20260526055702.1429061-8-hca@linux.ibm.com>
On Tue, May 26, 2026 at 07:57:02AM +0200, Heiko Carstens wrote:
> Provide an s390 specific implementation of arch_this_cpu_write()
> instead of the generic variant. The generic variant uses a quite
> expensive raw_local_irq_save() / raw_local_irq_restore() pair.
>
> Get rid of this by providing an own variant which makes use of the new
> percpu code section infrastructure.
>
> With this the text size of the kernel image is reduced by ~1k (defconfig).
>
> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
> ---
> arch/s390/include/asm/percpu.h | 30 ++++++++++++++++++++++++++++++
> 1 file changed, 30 insertions(+)
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
prev parent reply other threads:[~2026-06-02 11:40 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-26 5:56 [PATCH v5 0/7] s390: Improve this_cpu operations Heiko Carstens
2026-05-26 5:56 ` [PATCH v5 1/7] s390/percpu: Infrastructure for more efficient " Heiko Carstens
2026-06-01 7:10 ` Alexander Gordeev
2026-06-01 13:27 ` Heiko Carstens
2026-06-01 14:49 ` Alexander Gordeev
2026-06-01 15:08 ` Heiko Carstens
2026-06-02 13:32 ` David Laight
2026-06-02 13:54 ` Heiko Carstens
2026-06-02 14:36 ` David Laight
2026-06-02 10:08 ` Alexander Gordeev
2026-05-26 5:56 ` [PATCH v5 2/7] s390/percpu: Add missing do { } while (0) constructs Heiko Carstens
2026-06-01 7:14 ` Alexander Gordeev
2026-05-26 5:56 ` [PATCH v5 3/7] s390/percpu: Use new percpu code section for arch_this_cpu_add() Heiko Carstens
2026-06-02 11:33 ` Alexander Gordeev
2026-05-26 5:56 ` [PATCH v5 4/7] s390/percpu: Use new percpu code section for arch_this_cpu_add_return() Heiko Carstens
2026-06-02 11:34 ` Alexander Gordeev
2026-05-26 5:57 ` [PATCH v5 5/7] s390/percpu: Use new percpu code section for arch_this_cpu_[and|or]() Heiko Carstens
2026-06-02 11:35 ` Alexander Gordeev
2026-05-26 5:57 ` [PATCH v5 6/7] s390/percpu: Provide arch_this_cpu_read() implementation Heiko Carstens
2026-06-02 11:40 ` Alexander Gordeev
2026-05-26 5:57 ` [PATCH v5 7/7] s390/percpu: Provide arch_this_cpu_write() implementation Heiko Carstens
2026-06-02 11:40 ` Alexander Gordeev [this message]
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