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([2a0c:5a80:1204:1500:37e7:8150:d9df:36f]) by smtp.gmail.com with ESMTPSA id g9sm19432968wri.95.2022.02.10.03.04.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Feb 2022 03:04:29 -0800 (PST) Message-ID: <41e393e3eb7d2909130906954309acfe980238db.camel@redhat.com> Subject: Re: [PATCH 0/2] mm/page_alloc: Remote per-cpu lists drain support From: Nicolas Saenz Julienne To: Xiongfeng Wang , akpm@linux-foundation.org, mtosatti Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, frederic@kernel.org, tglx@linutronix.de, mtosatti@redhat.com, mgorman@suse.de, linux-rt-users@vger.kernel.org, vbabka@suse.cz, cl@linux.com, paulmck@kernel.org, willy@infradead.org Date: Thu, 10 Feb 2022 12:04:28 +0100 In-Reply-To: <8cf34eed-be5a-1aae-0523-c2de9e087cb6@huawei.com> References: <20220208100750.1189808-1-nsaenzju@redhat.com> <8cf34eed-be5a-1aae-0523-c2de9e087cb6@huawei.com> User-Agent: Evolution 3.42.3 (3.42.3-1.fc35) MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam11 X-Rspam-User: X-Stat-Signature: mwgms94otcrdrzzbj5kxn1rrjwo1iwnu Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=PVoQUHDV; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf17.hostedemail.com: domain of nsaenzju@redhat.com has no SPF policy when checking 170.10.129.124) smtp.mailfrom=nsaenzju@redhat.com X-Rspamd-Queue-Id: 00BEC40025 X-HE-Tag: 1644491072-657851 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 Thu, 2022-02-10 at 18:59 +0800, Xiongfeng Wang wrote: > Hi Nicolas, > > I found there are several 'lru_add_drain_per_cpu()' worker thread on the > NOHZ_FULL CPUs. I am just wondering do you have plan to add support for remote > per-cpu LRU pagevec drain ? Yes, this is something we've been meaning to fix too. But haven't started looking into it yet (maybe Marcelo can contradict me here). Regards, Nicolas