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Tue, 21 Jan 2025 11:55:01 +0000 (GMT) From: Sourabh Jain To: linuxppc-dev@lists.ozlabs.org Cc: Sourabh Jain , Andrew Morton , Baoquan he , Hari Bathini , Madhavan Srinivasan , Michael Ellerman , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Mahesh Salgaonkar Subject: [PATCH v2 4/6] powerpc/kdump: preserve user-specified memory limit Date: Tue, 21 Jan 2025 17:24:40 +0530 Message-ID: <20250121115442.1278458-5-sourabhjain@linux.ibm.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250121115442.1278458-1-sourabhjain@linux.ibm.com> References: <20250121115442.1278458-1-sourabhjain@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: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: KbBykFowyEE_QlXtcdph-dB5IUFImKzF X-Proofpoint-ORIG-GUID: KbBykFowyEE_QlXtcdph-dB5IUFImKzF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-01-21_05,2025-01-21_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 impostorscore=0 phishscore=0 priorityscore=1501 suspectscore=0 spamscore=0 bulkscore=0 mlxscore=0 adultscore=0 lowpriorityscore=0 clxscore=1015 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501210095 Content-Type: text/plain; charset="utf-8" Commit 59d58189f3d9 ("crash: fix crash memory reserve exceed system memory bug") fails crashkernel parsing if the crash size is found to be higher than system RAM, which makes the memory_limit adjustment code ineffective due to an early exit from reserve_crashkernel(). Regardless lets not violated the user-specified memory limit by adjusting it. Remove this adjustment to ensure all reservations stay within the limit. Commit f94f5ac07983 ("powerpc/fadump: Don't update the user-specified memory limit") did the same for fadump. Cc: Andrew Morton Cc: Baoquan he Cc: Hari Bathini CC: Madhavan Srinivasan Cc: Michael Ellerman Cc: kexec@lists.infradead.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Mahesh Salgaonkar Signed-off-by: Sourabh Jain Acked-by: Hari Bathini --- arch/powerpc/kexec/core.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/arch/powerpc/kexec/core.c b/arch/powerpc/kexec/core.c index b8333a49ea5d..4945b33322ae 100644 --- a/arch/powerpc/kexec/core.c +++ b/arch/powerpc/kexec/core.c @@ -150,14 +150,6 @@ void __init reserve_crashkernel(void) return; } =20 - /* Crash kernel trumps memory limit */ - if (memory_limit && memory_limit <=3D crashk_res.end) { - memory_limit =3D crashk_res.end + 1; - total_mem_sz =3D memory_limit; - printk("Adjusted memory limit for crashkernel, now 0x%llx\n", - memory_limit); - } - printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " "for crashkernel (System RAM: %ldMB)\n", (unsigned long)(crash_size >> 20), --=20 2.47.1