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Fri, 31 Jul 2026 16:50:05 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 31 Jul 2026 16:50:05 +0000 (GMT) From: Heiko Carstens To: Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Harald Freudenberger , Holger Dengler , Vineeth Vijayan , Peter Oberparleiter , Janosch Frank , Claudio Imbrenda , David Hildenbrand , Peter Zijlstra , Herbert Xu Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org Subject: [PATCH v4 4/4] s390/cio: Remove cond_resched() calls Date: Fri, 31 Jul 2026 18:50:04 +0200 Message-ID: <20260731165004.2758105-5-hca@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260731165004.2758105-1-hca@linux.ibm.com> References: <20260731165004.2758105-1-hca@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: LybXybKLUth0mOxJgDxmIWx26iJTIbRS X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzMxMDEyOCBTYWx0ZWRfX6bmlGG4+qc/p lKr1t6aMhXCXaRYJEe5r4wVITX859DvFdB6S017vaLQMPWzIpv+1UhA95MFTQx7yn8E1AOKdH1h /6+seTBNTb3ONI7xkB0Oq9jHRXh1PMA4HAjRJtxwwPmGiT5MVfh/YPyUt7t8oEzImxTYWlTDrCn CBtXKIA7r6aZle0MDh8uqxEh5f9tULhNBjX1crn8IDHyAq7Q/eLtMBVYsLIKSWYGy1HyP6JPAIg A6XWoyhPcrbToNm4pNGS2c9QKZlYx+xzsmiAdbMzuN8JxrC21jPmhXZmTv716dPDxpmSctfwhkj IdJLZIStS7UgIodVyNUFnQ9Tn29NlNmvf3S3nxDvvUkeB7eFo2IF7zhxAkZAzSbGPSJekyID/z2 JF+F0gNe+ezk89iUJ8oT5pnqBI8ttPbpVlLctXKYCiXErHyLmNHZyV6NGnlFW2KJLO+04Lgs5g8 BNfmz6Ba5U/EePAjRyg== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzMxMDEyOCBTYWx0ZWRfXy7tO6DTI2rwe kLxIsbB2NXhZM47O1Y4UJS4rTclQJAwd4oezfDguvm0Mwuo7h9SfbR8aNObUzC+b9pDAlRC1nr5 87vVJ38CXJwGkIYyQdoaB8CkcueM7B0= X-Authority-Analysis: v=2.4 cv=AZeB2XXG c=1 sm=1 tr=0 ts=6a6cd243 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=yDFob_ultygKJmZAZNUA:9 a=O8hF6Hzn-FEA:10 X-Proofpoint-GUID: LybXybKLUth0mOxJgDxmIWx26iJTIbRS 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=2026-07-31_05,2026-07-30_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 priorityscore=1501 phishscore=0 adultscore=0 impostorscore=0 clxscore=1015 malwarescore=0 suspectscore=0 lowpriorityscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607310128 Since [1] cond_resched() is a no-op on s390. Remove all calls. [1] commit 7dadeaa6e851 ("sched: Further restrict the preemption modes") Reviewed-by: Peter Oberparleiter Signed-off-by: Heiko Carstens --- drivers/s390/cio/css.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index e5a0ec6b4e3e..54b8b8639694 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -618,11 +618,6 @@ static int slow_eval_known_fn(struct subchannel *sch, void *data) rc = css_evaluate_known_subchannel(sch, 1); if (rc == -EAGAIN) css_schedule_eval(sch->schid); - /* - * The loop might take long time for platforms with lots of - * known devices. Allow scheduling here. - */ - cond_resched(); } return 0; } @@ -654,9 +649,6 @@ static int slow_eval_unknown_fn(struct subchannel_id schid, void *data) default: rc = 0; } - /* Allow scheduling here since the containing loop might - * take a while. */ - cond_resched(); } return rc; } -- 2.53.0