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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 3/4] s390: Remove cond_resched() calls Date: Mon, 27 Jul 2026 18:24:29 +0200 Message-ID: <20260727162430.1599396-4-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-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: 6Rka_o-CfgxRT0pZTerkRfzDUBqria0b X-Proofpoint-Spam-Info: AW1haW4tMjYwNzI3MDE1MSBTYWx0ZWRfX0V+RXAhMl1g2 lDcBt7ftvAOMo3bVUOB8I2T5Tx8nTKriDGZSye3NgTBsPthcN9p0gIDd7HxNw1GVS5RL6edFPC0 xRxIzMbar0sEjXQyCE9ebz19xbvcBd4= X-Authority-Analysis: v=2.4 cv=E/z9Y6dl c=1 sm=1 tr=0 ts=6a678b9f cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=rF5c3LEHrUaPZy42MJMA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzI3MDE1MSBTYWx0ZWRfXxko59IMtM/je I58wHckAF6qpkyjTJDRZ1vUMLvz+LjTlJl5JAREs6lah9iQlGC5ZIItj0zwtPRegN2EmZ2o4CYk RnKv/4LmRSNR+euEZChJVjph2xyGitGyMJ4kiaUR4nXtIz4bRYrr3EzXwgtFB7QxG8jnDDrqJML 7PI10WVwiGbdaj5xe5D5koxuKVnTSw5CGbPcbtSdc65L9S4NeCZrJ5EiIdMDEXdE6MONlk6Xv+w BSTT7jcQrjMdg3X28YO9UmmooWzNwcL3SbJkgyvLIFmVZHDFnDtbTHB1O6DODuUYZ03qfeV/YJh Lq24VOZ1EtKaSQxDWgr3pqtzhH2LB6HfKyjCbWL2vcHNzHTQV9NgY1ic2rcnsAViP806riCtdCS w7W+dCamAhlEasSItw4syDNhBc9L8k16uJMEahqV0V/Yj7J3BtY6/n4YOUiP+QW0Y24hDALGNS6 2hDLwhgdnvF5+eEmYKg== X-Proofpoint-GUID: 6Rka_o-CfgxRT0pZTerkRfzDUBqria0b 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 adultscore=0 priorityscore=1501 spamscore=0 clxscore=1015 phishscore=0 lowpriorityscore=0 bulkscore=0 malwarescore=0 impostorscore=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 --- arch/s390/kernel/perf_cpum_cf.c | 1 - arch/s390/mm/cmm.c | 2 -- arch/s390/mm/pageattr.c | 5 ----- arch/s390/mm/pgalloc.c | 1 - arch/s390/pci/pci.c | 4 +--- 5 files changed, 1 insertion(+), 12 deletions(-) diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c index 2076ac22e2c4..5f2596be6c1e 100644 --- a/arch/s390/kernel/perf_cpum_cf.c +++ b/arch/s390/kernel/perf_cpum_cf.c @@ -1496,7 +1496,6 @@ static int cfset_all_copy(unsigned long arg, cpumask_t *mask) goto out; } uptr += sizeof(struct s390_ctrset_cpudata) + cpuhw->used; - cond_resched(); } cpus = cpumask_weight(mask); if (put_user(cpus, &ctrset_read->no_cpus)) diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c index eb7ef63fab1e..d342b68ee9be 100644 --- a/arch/s390/mm/cmm.c +++ b/arch/s390/mm/cmm.c @@ -95,7 +95,6 @@ static long cmm_alloc_pages(long nr, long *counter, (*counter)++; spin_unlock(&cmm_lock); nr--; - cond_resched(); } return nr; } @@ -134,7 +133,6 @@ static long cmm_free_pages(long nr, long *counter, struct cmm_page_array **list) inc = __cmm_free_pages(inc, counter, list); if (inc) break; - cond_resched(); } return nr + inc; } diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c index e6f788696dd1..1e202e3d08e7 100644 --- a/arch/s390/mm/pageattr.c +++ b/arch/s390/mm/pageattr.c @@ -105,7 +105,6 @@ static int walk_pte_level(pmd_t *pmdp, unsigned long addr, unsigned long end, pgt_set((unsigned long *)ptep, pte_val(new), addr, CRDTE_DTT_PAGE); ptep++; addr += PAGE_SIZE; - cond_resched(); } while (addr < end); return 0; } @@ -194,7 +193,6 @@ static int walk_pmd_level(pud_t *pudp, unsigned long addr, unsigned long end, } pmdp++; addr = next; - cond_resched(); } while (addr < end); return rc; } @@ -281,7 +279,6 @@ static int walk_pud_level(p4d_t *p4d, unsigned long addr, unsigned long end, } pudp++; addr = next; - cond_resched(); } while (addr < end && !rc); return rc; } @@ -301,7 +298,6 @@ static int walk_p4d_level(pgd_t *pgd, unsigned long addr, unsigned long end, rc = walk_pud_level(p4dp, addr, next, flags); p4dp++; addr = next; - cond_resched(); } while (addr < end && !rc); return rc; } @@ -323,7 +319,6 @@ static int change_page_attr(unsigned long addr, unsigned long end, rc = walk_p4d_level(pgdp, addr, next, flags); if (rc) break; - cond_resched(); } while (pgdp++, addr = next, addr < end && !rc); return rc; } diff --git a/arch/s390/mm/pgalloc.c b/arch/s390/mm/pgalloc.c index 7ac44543e051..9610770fcf6d 100644 --- a/arch/s390/mm/pgalloc.c +++ b/arch/s390/mm/pgalloc.c @@ -268,7 +268,6 @@ static int base_segment_walk(unsigned long *origin, unsigned long addr, return rc; if (!alloc) base_pgt_free(table); - cond_resched(); } while (ste++, addr = next, addr < end); return 0; } diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 39bd2adfc240..2dec238f3f12 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -1173,10 +1173,8 @@ int zpci_scan_devices(void) return rc; zpci_add_devices(&scan_list); - zpci_bus_for_each(zbus) { + zpci_bus_for_each(zbus) zpci_bus_scan_bus(zbus); - cond_resched(); - } return 0; } -- 2.53.0