From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 78805392C3C; Mon, 27 Jul 2026 16:47:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.156.1 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785170859; cv=none; b=KxQagi6/3MGUiAItfRuvt2dsNkf/pFZo/ZhV+Kwkmn9T+aSId2NHXBqFS5EvutsTQdbJrK8wS71DYZIqcsf1lnDotNQkij+3vSNfI7Q7fZFUj24XgmekpdBB3DtU2xvt/FxP11BC9/3WzKjuvGapL4Vhg1y+lmmTA/jF/8aZt08= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785170859; c=relaxed/simple; bh=kr5/GO6I43+Mwevkuvj0Hosq0uJDwGHD3NmsFix3/5Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Q0fi0DJsiY7tkLM8kuJj3pzsO9nk0X5XdOUIa2YttzJ5njRMd6oLDKAlECA8HhEPUMLweY0COUj6LfZyQakk+/1lrfiyTMUfpfFXkJ6q2rtGszGgYEDvaBxngGQBSjgmDfHg4+b53EuUZ3rld4irzFMjNk6FmKm/s0k7PrusP2A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=WYyJIS4c; arc=none smtp.client-ip=148.163.156.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="WYyJIS4c" Received: from pps.filterd (m0360083.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 66RDnDWX2374341; Mon, 27 Jul 2026 16:47:28 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=mx3MdLelknP3v+1yP oJwCJB+bdzjS9fssNeam631qw8=; b=WYyJIS4c7mkku0bJiBEXbEYJfxtWV80sj kJB6Du7rACHY45S3ecX37p3q1FDrtWO1f6p8AePDFhDhr6evVzLycMu4tbPMFI8B Zl1uUloWROXGvleOUHDNc1yDdmLXzfGib8fxwQqLqgivuc1k8M36kPkhOq9mvb8m SLwZ5JKx+uPVK/48MxCQ9o9olAD7E9eW//8Ksc1jwXOt+XI1F+6S4phyWqBbLkoj YqsiKrUWLkQq8ywh+ZZWWcBPC+6N/UlytIjWM713TnSKJixqkqnvLdBQELh6Ymyz 3qAQ4yfAvhLU5HR/MbihGb2F55vnlYl2FU/kPb2ABJVqWPVzC64rA== Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4fmuw793cx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 27 Jul 2026 16:47:27 +0000 (GMT) Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id 66RGfEgQ003844; Mon, 27 Jul 2026 16:47:26 GMT Received: from smtprelay04.fra02v.mail.ibm.com ([9.218.2.228]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 4fn7fq6b3d-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 27 Jul 2026 16:47:26 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 66RGlMH812648888 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 27 Jul 2026 16:47:23 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5A5A82024D; Mon, 27 Jul 2026 16:24:32 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4EE1D20249; Mon, 27 Jul 2026 16:24:31 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 27 Jul 2026 16:24:31 +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 Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/4] s390/cio: Remove cond_resched() calls Date: Mon, 27 Jul 2026 18:24:30 +0200 Message-ID: <20260727162430.1599396-5-hca@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260727162430.1599396-1-hca@linux.ibm.com> References: <20260727162430.1599396-1-hca@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Rnq__M6SAXDEOtEfjT9BdNEVZ4BHctSe X-Proofpoint-ORIG-GUID: Rnq__M6SAXDEOtEfjT9BdNEVZ4BHctSe X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzI3MDE1MSBTYWx0ZWRfX4LAZzzWMczcy /X4o+GiSPZwzAD0lCoinE+xSYFiyHlh/RC7nHtKOyDt0iwKRwRRPSlfIYPAs1Golqhh6iZACK3n qALaLRXLEwRc2cZTRAqVQzg8fdE+W9+BKXo3uHMP2eXui5/c711MKhB3ENAQdeEW6vgK0mDwgaB h0w3glesQDe7HHKTX0wnYF0XUUArPmhzJdnUZIVj5mqBywGQ8BxQZbkOFOt87fbaacfJzkfo3eH yMAs2uL/F9xm/ATf6DwaL6H/NB2Gn74JwRfCrBtmlwf+ZuYBz2wzOn3Pr26WHgjPoKGY4L81pHQ TXuhOp+bZ2tN3lMT6Xy7/h6KWFCA25KJ33n3OFHC24ugSDMo0R8kUzD3gGbAv/p8mCqJCaVP9wE LXM+IvKJAbQ0VzRSUS630jIavIRqvyvVZbrRDMG3RT2v/eOblVu8selYapxy6Pk4fYOp3cHrwSo +o26N6QZlc67F6LSHVg== X-Authority-Analysis: v=2.4 cv=SKFykuvH c=1 sm=1 tr=0 ts=6a678b9f cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=yDFob_ultygKJmZAZNUA:9 a=O8hF6Hzn-FEA:10 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzI3MDE1MSBTYWx0ZWRfX5saB17z+b3pT /TVX+uLoH9pGz3focDjkQBgg1Xj6viZtw86l1YEd1aaxsSj5D2dp/EnVnuLAKAEXbq3NdPNCbl8 ELOi19H7ii9iE7vIEcFh4wqwZ7jl/iI= 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=2026-07-27_04,2026-07-24_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 clxscore=1015 adultscore=0 lowpriorityscore=0 bulkscore=0 impostorscore=0 phishscore=0 spamscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607270151 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 --- 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