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version 1.23, 2021/10/02 12:30:25 version 1.24, 2021/10/02 12:31:17
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 <li>SMP Improvements  <li>SMP Improvements
   <ul>    <ul>
         <li>...          <li>Made pmap_extract() mpsafe on hppa and amd64.
           <li>Introduced CPU_IS_RUNNING() and used it in scheduler-related code to prevent waiting on non-running CPUs.
           <li>Made anonymous object reference counting independent from the KERNEL_LOCK().
           <li>Unlocked <a href="https://man.openbsd.org/connect.2">connect(2)</a>.
           <li>Unlocked <a href="https://man.openbsd.org/setrtable.2">setrtable(2)</a>.
           <li>Introduced per-CPU <a href="https://man.openbsd.org/panic.9">panic(9)</a> message buffers.
           <li>Used so_lock to protect key management (PF_KEY) sockets.
           <li>Unlocked <a href="https://man.openbsd.org/lseek.2">lseek(2)</a>.
           <li>Unlocked the top part of the fault handler.
   </ul>    </ul>
   
 <li>Direct Rendering Manager  <li>Direct Rendering Manager
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