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Date: Wed, 26 Feb 2020 13:55:50 -0800
From: Gleb Smirnoff <glebius@freebsd.org>
To: Ravi Pokala <rpokala@freebsd.org>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: Re: svn commit: r358317 - head/sys/kern
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On Tue, Feb 25, 2020 at 12:02:29PM -0800, Ravi Pokala wrote:
R>       When sendfile_swapin() sweeps through pages in search for a bogus page
R>       skip first and last pages.  This is a micro optimisation.
R> 
R> Yes, but *why* skip the first and last pages?

We may have inserted bogus pages in the middle of a request. We never substitute
first or last.

-- 
Gleb Smirnoff