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[83.37.136.42]) by smtp.gmail.com with ESMTPSA id u7sm4398657wmm.8.2020.05.20.16.26.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 20 May 2020 16:26:29 -0700 (PDT) Subject: Re: [dm-devel] [PATCH v4 0/2] Historical Service Time Path Selector To: Gabriel Krisman Bertazi , agk@redhat.com, snitzer@redhat.com Cc: breeves@redhat.com, linux-kernel@vger.kernel.org, khazhy@google.com, song@kernel.org, dm-devel@redhat.com, mpatocka@redhat.com, kernel@collabora.com References: <20200511163910.3778467-1-krisman@collabora.com> From: Xose Vazquez Perez Message-ID: Date: Thu, 21 May 2020 01:26:27 +0200 MIME-Version: 1.0 In-Reply-To: <20200511163910.3778467-1-krisman@collabora.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/11/20 6:39 PM, Gabriel Krisman Bertazi wrote: > This fourth version of HST applies the suggestion from Mikulas Patocka > to do the ktime_get_ns inside the mpath map_bio instead of generic > device-mapper code. This means that struct dm_mpath_io gained another > 64bit field. For the request-based case, we continue to use the block > layer start time information. You should add some info to the multipath.conf.5 man page ( https://git.opensvc.com/gitweb.cgi?p=multipath-tools/.git;a=blob;f=multipath/multipath.conf.5;h=05a5e8ffeb110d969f3b2381eb3b88d7f28380f6;hb=HEAD#l189 ), or none one is going to use it. Thanks.