xref: /openbmc/linux/Documentation/RCU/Design/Requirements/GPpartitionReaders1.svg (revision 649e4368)

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->

<svg
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:cc="http://creativecommons.org/ns#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
   width="447.99197"
   height="428.19299"
   id="svg2"
   version="1.1"
   inkscape:version="0.48.3.1 r9886"
   sodipodi:docname="GPpartitionReaders1.svg">
  <defs
     id="defs4">
    <marker
       inkscape:stockid="Arrow2Lend"
       orient="auto"
       refY="0"
       refX="0"
       id="Arrow2Lend"
       style="overflow:visible">
      <path
         id="path3792"
         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
         inkscape:connector-curvature="0" />
    </marker>
    <marker
       inkscape:stockid="Arrow2Lstart"
       orient="auto"
       refY="0"
       refX="0"
       id="Arrow2Lstart"
       style="overflow:visible">
      <path
         id="path3789"
         style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
         transform="matrix(1.1,0,0,1.1,1.1,0)"
         inkscape:connector-curvature="0" />
    </marker>
  </defs>
  <sodipodi:namedview
     id="base"
     pagecolor="#ffffff"
     bordercolor="#666666"
     borderopacity="1.0"
     inkscape:pageopacity="0.0"
     inkscape:pageshadow="2"
     inkscape:zoom="1.6184291"
     inkscape:cx="223.99599"
     inkscape:cy="214.0965"
     inkscape:document-units="px"
     inkscape:current-layer="layer1"
     showgrid="false"
     inkscape:window-width="979"
     inkscape:window-height="836"
     inkscape:window-x="571"
     inkscape:window-y="335"
     inkscape:window-maximized="0"
     fit-margin-top="5"
     fit-margin-left="5"
     fit-margin-right="5"
     fit-margin-bottom="5" />
  <metadata
     id="metadata7">
    <rdf:RDF>
      <cc:Work
         rdf:about="">
        <dc:format>image/svg+xml</dc:format>
        <dc:type
           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
        <dc:title></dc:title>
      </cc:Work>
    </rdf:RDF>
  </metadata>
  <g
     inkscape:label="Layer 1"
     inkscape:groupmode="layer"
     id="layer1"
     transform="translate(-28.441125,-185.60612)">
    <flowRoot
       xml:space="preserve"
       id="flowRoot2985"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"><flowRegion
         id="flowRegion2987"><rect
           id="rect2989"
           width="82.85714"
           height="11.428572"
           x="240"
           y="492.36218" /></flowRegion><flowPara
         id="flowPara2991"></flowPara></flowRoot>    <g
       id="g4433"
       transform="translate(2,0)">
      <text
         sodipodi:linespacing="125%"
         id="text2993"
         y="-261.66608"
         x="412.12299"
         style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
         xml:space="preserve"
         transform="matrix(0,1,-1,0,0,0)"><tspan
           y="-261.66608"
           x="412.12299"
           id="tspan2995"
           sodipodi:role="line">synchronize_rcu()</tspan></text>
      <g
         id="g4417"
         transform="matrix(0,1,-1,0,730.90257,222.4928)">
        <path
           style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-start:url(#Arrow2Lstart);marker-end:url(#Arrow2Lend)"
           d="m 97.580736,477.4048 183.140664,0"
           id="path2997"
           inkscape:connector-curvature="0"
           sodipodi:nodetypes="cc" />
        <path
           style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
           d="m 96.752718,465.38398 0,22.62742"
           id="path4397"
           inkscape:connector-curvature="0"
           sodipodi:nodetypes="cc" />
        <path
           style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
           d="m 281.54942,465.38397 0,22.62742"
           id="path4397-5"
           inkscape:connector-curvature="0"
           sodipodi:nodetypes="cc" />
      </g>
    </g>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="112.04738"
       y="268.18076"
       id="text4429"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4431"
         x="112.04738"
         y="268.18076">WRITE_ONCE(a, 1);</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="112.04738"
       y="439.13766"
       id="text4441"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4443"
         x="112.04738"
         y="439.13766">WRITE_ONCE(b, 1);</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="255.60869"
       y="309.29346"
       id="text4445"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4447"
         x="255.60869"
         y="309.29346">r1 = READ_ONCE(a);</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="255.14423"
       y="520.61786"
       id="text4449"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4451"
         x="255.14423"
         y="520.61786">WRITE_ONCE(c, 1);</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="396.10254"
       y="384.71124"
       id="text4453"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4455"
         x="396.10254"
         y="384.71124">r2 = READ_ONCE(b);</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="396.10254"
       y="582.13617"
       id="text4457"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4459"
         x="396.10254"
         y="582.13617">r3 = READ_ONCE(c);</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="112.08231"
       y="213.91006"
       id="text4461"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4463"
         x="112.08231"
         y="213.91006">thread0()</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="252.34512"
       y="213.91006"
       id="text4461-6"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4463-0"
         x="252.34512"
         y="213.91006">thread1()</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="396.42557"
       y="213.91006"
       id="text4461-2"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4463-2"
         x="396.42557"
         y="213.91006">thread2()</tspan></text>
    <rect
       style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
       id="rect4495"
       width="436.28488"
       height="416.4859"
       x="34.648232"
       y="191.10612" />
    <path
       style="fill:none;stroke:#000000;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
       d="m 183.14066,191.10612 0,417.193 -0.70711,0"
       id="path4497"
       inkscape:connector-curvature="0" />
    <path
       style="fill:none;stroke:#000000;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
       d="m 325.13867,191.10612 0,417.193 -0.70711,0"
       id="path4497-5"
       inkscape:connector-curvature="0" />
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="111.75929"
       y="251.53981"
       id="text4429-8"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4431-9"
         x="111.75929"
         y="251.53981">rcu_read_lock();</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="396.10254"
       y="367.91556"
       id="text4429-8-9"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4431-9-4"
         x="396.10254"
         y="367.91556">rcu_read_lock();</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="396.10254"
       y="597.40289"
       id="text4429-8-9-3"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4431-9-4-4"
         x="396.10254"
         y="597.40289">rcu_read_unlock();</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="111.75929"
       y="453.15311"
       id="text4429-8-9-3-1"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4431-9-4-4-6"
         x="111.75929"
         y="453.15311">rcu_read_unlock();</tspan></text>
    <path
       style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
       d="m 33.941125,227.87568 436.284885,0 0,0.7071"
       id="path4608"
       inkscape:connector-curvature="0" />
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="394.94427"
       y="345.66351"
       id="text4648"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4650"
         x="394.94427"
         y="345.66351">QS</tspan></text>
    <path
       sodipodi:type="arc"
       style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
       id="path4652"
       sodipodi:cx="358.85669"
       sodipodi:cy="142.87541"
       sodipodi:rx="10.960155"
       sodipodi:ry="10.253048"
       d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0"
       transform="translate(36.441125,199.60612)"
       sodipodi:start="4.7135481"
       sodipodi:end="10.994651"
       sodipodi:open="true" />
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="112.11968"
       y="475.77856"
       id="text4648-4"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4650-4"
         x="112.11968"
         y="475.77856">QS</tspan></text>
    <path
       sodipodi:type="arc"
       style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
       id="path4652-7"
       sodipodi:cx="358.85669"
       sodipodi:cy="142.87541"
       sodipodi:rx="10.960155"
       sodipodi:ry="10.253048"
       d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0"
       transform="translate(-246.38346,329.72117)"
       sodipodi:start="4.7135481"
       sodipodi:end="10.994651"
       sodipodi:open="true" />
    <path
       sodipodi:type="arc"
       style="fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
       id="path4652-7-7"
       sodipodi:cx="358.85669"
       sodipodi:cy="142.87541"
       sodipodi:rx="10.960155"
       sodipodi:ry="10.253048"
       d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0"
       transform="translate(-103.65246,202.90878)"
       sodipodi:start="4.7135481"
       sodipodi:end="10.994651"
       sodipodi:open="true" />
    <text
       xml:space="preserve"
       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Symbol;-inkscape-font-specification:Symbol"
       x="254.85066"
       y="348.96619"
       id="text4648-4-3"
       sodipodi:linespacing="125%"><tspan
         sodipodi:role="line"
         id="tspan4650-4-5"
         x="254.85066"
         y="348.96619">QS</tspan></text>
  </g>
</svg>