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Fri, 22 Apr 2022 17:50:25 +0000 Received: from offworld (unknown [104.36.29.107]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: dave@stgolabs.net) by pdx1-sub0-mail-a254.dreamhost.com (Postfix) with ESMTPSA id 4KlMPp6fCCz29; Fri, 22 Apr 2022 10:50:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=stgolabs.net; s=dreamhost; t=1650649824; bh=RHwqhjzw9kY1izQs5LW3PnhhQu2A406gGRiwnqGFZvs=; h=Date:From:To:Cc:Subject:Content-Type; b=YaHDEWSULS/cT2SSarbSX8MPl2aqFaMXnfW6jCS8H4GsOmyJ2d0zeuPoe5L3mDSsM c3/1IgCORa1jHkINI2jRKgt5HPnedwWQRNEfTyWkzav2DDY1Uqmo49msmd1nZkrQr0 +TniIOUhbLqPYUJmurz7U5lNZ/B6v4w5987yfPsHltKfntXecYHw7DZb+x3rCfWcz3 gdKkXd9/NS0F4lJ2bPk0J0vrIJNUu4NvEUPAZ/vXN+W8Eui7nU5eqU4pdRO4oNtglV lyv/Y1RwM3mMON3bBHwbpWMD3VYXNITNaOsf7aMlkKCPpfCu0AoaZ0vnicCbfz9CMx 8f4nnS18GZPKg== Date: Fri, 22 Apr 2022 10:50:20 -0700 From: Davidlohr Bueso To: Yang Shi Cc: jvgediya@linux.ibm.com, ying.huang@intel.com, weixugc@google.com, linux-mm@kvack.org, mhocko@kernel.org, akpm@linux-foundation.org, rientjes@google.com, yosryahmed@google.com, hannes@cmpxchg.org, shakeelb@google.com, dave.hansen@linux.intel.com, tim.c.chen@linux.intel.com, roman.gushchin@linux.dev, gthelen@google.com, a.manzanares@samsung.com, heekwon.p@samsung.com, gim.jongmin@samsung.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH 5/6] mm/migration: export demotion_path of a node via sysfs Message-ID: <20220422175020.lm2xqbg7lm2tr25r@offworld> Mail-Followup-To: Yang Shi , jvgediya@linux.ibm.com, ying.huang@intel.com, weixugc@google.com, linux-mm@kvack.org, mhocko@kernel.org, akpm@linux-foundation.org, rientjes@google.com, yosryahmed@google.com, hannes@cmpxchg.org, shakeelb@google.com, dave.hansen@linux.intel.com, tim.c.chen@linux.intel.com, roman.gushchin@linux.dev, gthelen@google.com, a.manzanares@samsung.com, heekwon.p@samsung.com, gim.jongmin@samsung.com, linux-kernel@vger.kernel.org References: <20220416053902.68517-1-dave@stgolabs.net> <20220416053902.68517-6-dave@stgolabs.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20201120 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 273DFC001F X-Stat-Signature: 4pkwdbs8ozw3ij8759pdxn35qky1pzbm Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=stgolabs.net header.s=dreamhost header.b=YaHDEWSU; dmarc=none; spf=pass (imf22.hostedemail.com: domain of dave@stgolabs.net designates 23.83.209.81 as permitted sender) smtp.mailfrom=dave@stgolabs.net X-Rspam-User: X-HE-Tag: 1650649826-27796 X-Bogosity: Ham, tests=bogofilter, spamicity=0.375377, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, 22 Apr 2022, Yang Shi wrote: >On Fri, Apr 22, 2022 at 10:31 AM Yang Shi wrote: >> >> On Fri, Apr 15, 2022 at 10:39 PM Davidlohr Bueso wrote: >> > >> > Add a /sys/devices/system/node/nodeX/demotion_path file >> > to export the possible target(s) in node_demotion[node]. >> >> I'm not sure if you noticed that Jagdish Gediya is working on the >> similar patch, please see >> https://lore.kernel.org/linux-mm/20220413092206.73974-1-jvgediya@linux.ibm.com/ > >Loop in Jagdish Gediya, Ying Huang and Wei Xu. > Hmm I had missed this thread, I'll go have a look. >> >> It would be better to combine the two to avoid duplicate effort. Indeed - and even more reason for lsfmm discussions defining the future ABI for tiering. Thanks, Davidlohr