I noticed the following out-of-date bits in a comment in xlogutils.c:

   * LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE), for reading from the main
   * fork.
   *
-  * (Getting the lock is not really necessary, since we expect that this is
-  * only used during single-process XLOG replay, but some subroutines such
-  * as MarkBufferDirty will complain if we don't. And hopefully we'll get
-  * hot standby support in the future, where there will be backends running
-  * read-only queries during XLOG replay.)
-  *
   * The returned buffer is exclusively-locked.
   *
   * For historical reasons, instead of a ReadBufferMode argument, this only

--
Joshua Tolley / eggyknap
End Point Corporation
http://www.endpoint.com

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