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Fri, 13 May 2022 06:30:26 -0700 Received: from qian (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Fri, 13 May 2022 06:30:26 -0700 Date: Fri, 13 May 2022 09:30:22 -0400 From: Qian Cai To: Liam Howlett CC: "maple-tree@lists.infradead.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andrew Morton Subject: Re: [PATCH v9 67/69] mm: remove the vma linked list Message-ID: <20220513133022.GA482@qian> References: <20220504002554.654642-1-Liam.Howlett@oracle.com> <20220504011345.662299-1-Liam.Howlett@oracle.com> <20220504011345.662299-52-Liam.Howlett@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20220504011345.662299-52-Liam.Howlett@oracle.com> X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-Rspamd-Queue-Id: 1F328A00A9 X-Stat-Signature: d1jhqhgaptfirduqik66mwfmof7qiyyx X-Rspam-User: Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=quicinc.com header.s=qcdkim header.b=ahnnX1Nj; spf=pass (imf25.hostedemail.com: domain of quic_qiancai@quicinc.com designates 129.46.98.28 as permitted sender) smtp.mailfrom=quic_qiancai@quicinc.com; dmarc=pass (policy=none) header.from=quicinc.com X-Rspamd-Server: rspam09 X-HE-Tag: 1652448608-813016 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, May 04, 2022 at 01:14:07AM +0000, Liam Howlett wrote: ... > @@ -2488,13 +2380,20 @@ do_mas_align_munmap(struct ma_state *mas, struct vm_area_struct *vma, > struct mm_struct *mm, unsigned long start, > unsigned long end, struct list_head *uf, bool downgrade) > { > - struct vm_area_struct *prev, *last; > + struct vm_area_struct *prev, *next = NULL; > + struct maple_tree mt_detach; > + int count = 0; > int error = -ENOMEM; > - /* we have start < vma->vm_end */ > + MA_STATE(mas_detach, &mt_detach, start, end - 1); > + mt_init_flags(&mt_detach, MM_MT_FLAGS); > + mt_set_external_lock(&mt_detach, &mm->mmap_lock); > > if (mas_preallocate(mas, vma, GFP_KERNEL)) > return -ENOMEM; > > + if (mas_preallocate(&mas_detach, vma, GFP_KERNEL)) This guy was reported as leaks as well. unreferenced object 0xffff0802d49b5500 (size 256): comm "trinity-c22", pid 107245, jiffies 4295674711 (age 816.980s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: kmem_cache_alloc mas_alloc_nodes mas_preallocate do_mas_align_munmap.constprop.0 do_mas_align_munmap at mm/mmap.c:2384 do_mas_munmap __vm_munmap __arm64_sys_munmap invoke_syscall el0_svc_common.constprop.0 do_el0_svc el0_svc el0t_64_sync_handler el0t_64_sync > + return -ENOMEM; > + > mas->last = end - 1; > /* > * If we need to split any vma, do it now to save pain later.