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Wed, 29 Jul 2026 16:45:50 +0000 (GMT) Received: from p-imbrenda (unknown [9.224.75.30]) by smtpav03.fra02v.mail.ibm.com (Postfix) with SMTP; Wed, 29 Jul 2026 16:45:50 +0000 (GMT) Date: Wed, 29 Jul 2026 18:45:48 +0200 From: Claudio Imbrenda To: Heiko Carstens Cc: Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Harald Freudenberger , Holger Dengler , Vineeth Vijayan , Peter Oberparleiter , Janosch Frank , David Hildenbrand , Peter Zijlstra , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/4] KVM: s390: Remove cond_resched() calls Message-ID: <20260729184548.38b7c791@p-imbrenda> In-Reply-To: <20260727162430.1599396-3-hca@linux.ibm.com> References: <20260727162430.1599396-1-hca@linux.ibm.com> <20260727162430.1599396-3-hca@linux.ibm.com> Organization: IBM X-Mailer: Claws Mail 4.4.0 (GTK 3.24.52; x86_64-redhat-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzI5MDEyOSBTYWx0ZWRfX7ia9hMX2n0Hv uHZ1rTcX4iMbsEw63VZtANBtLKE8HvQG0vTRnZRbXRS4dwTcpBfbNqg4+i927hdxT75M+bk3WeJ aX1QNnb92OToZ91tWrn5Cy60wuk0v+Q= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzI5MDEyOSBTYWx0ZWRfX3gq5sJ0UDGet uGK0X2WY1QpD4kwNvF3xUTZU4TdGBJJOuap0yfrxmvMg2MnGLtUENMUaj+EF7m720mPLx29uo8v YBMch0Yf6cxPcGthKUrK0sdoToLvWw1NyA+zwSJ0HHzz6kylf+bcx2bQWmbyJQ2dm4ZoGRBlK95 /IxYQ2WiMWKlh7NpePxYQDAdt4IIHJjiqBLYVcptLZLEhe79ymDlZn6XNIsABMZAhN1m+oh1cch +pXQ01ZQptKWHMICRwUZU6fp30nmbj+7G1V+NvrMFNDCQOXNBP2ICph6Jd6fmLk1tg/3aEJY2CD EYwNgN8j8Uerly/KtzzKl1ONQz4lZfCRwQcmQ/JX4asrbXaYDnxbbs17dJtKCQVzMtbz8sJfTiT Z4HiQfS9K2Nf+cJOOcKJd3NG59H7i5L6YFobP+oa1ILYzKzgyWdJNqsajbY20t8sGn3WsVe4VW8 641TlCe4Uons2FeKy6w== X-Authority-Analysis: v=2.4 cv=b5WCJNGx c=1 sm=1 tr=0 ts=6a6a2e43 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=kj9zAlcOel0A:10 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=46ucpF2riSQio0EZcHYA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-GUID: Kg9jgJS_JnBR9It7Es2Eglddsid6VJHo X-Proofpoint-ORIG-GUID: Kg9jgJS_JnBR9It7Es2Eglddsid6VJHo X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-29_06,2026-07-29_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 adultscore=0 malwarescore=0 impostorscore=0 bulkscore=0 phishscore=0 suspectscore=0 clxscore=1011 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607290129 On Mon, 27 Jul 2026 18:24:28 +0200 Heiko Carstens wrote: > Since [1] cond_resched() is a no-op on s390. Remove all calls. > > [1] commit 7dadeaa6e851 ("sched: Further restrict the preemption modes") > > Signed-off-by: Heiko Carstens > --- > arch/s390/include/asm/uv.h | 1 - > arch/s390/kvm/gaccess.c | 8 ++------ > arch/s390/kvm/gmap.c | 4 ---- > arch/s390/kvm/kvm-s390.c | 1 - > arch/s390/kvm/pv.c | 1 - > arch/s390/kvm/vsie.c | 1 - > arch/s390/mm/gmap_helpers.c | 1 - > 7 files changed, 2 insertions(+), 15 deletions(-) > > diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h > index d919e69662f5..795da130342a 100644 > --- a/arch/s390/include/asm/uv.h > +++ b/arch/s390/include/asm/uv.h > @@ -461,7 +461,6 @@ static inline int uv_call_sched(unsigned long r1, unsigned long r2) > > do { > cc = __uv_call(r1, r2); > - cond_resched(); > } while (cc > 1); > return cc; > } so now uv_call_sched() is the same as uv_call()? just drop uv_call_sched() then [...]