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Date: Thu, 17 Mar 2005 11:23:29 -0500
From: Bill Stoddard <bill@wstoddard.com>
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To: dev@httpd.apache.org
Subject: Re: do we still want sendfile enabled with our default conf files?
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Joshua Slive wrote:
> Bill Stoddard wrote:
> 
>> Guess I've not been paying attention... what type of problems have you 
>> seen with sendfile (TransmitFile) on Win32?  We do have a performance 
>> problem (will leave out details unless your interested) but I was not 
>> aware of corruption problems...
> 
> 
> The example which, I guess, was the impetus for this thread:
> http://issues.apache.org/bugzilla/show_bug.cgi?id=34037
> 
> I don't have any way of quantifying how frequent this is, but it 
> certainly shows up on a regular basis.
> 
> Joshua.

Thanks, that's the buggy LSP problem (symantic AV is the likely culprit in this case. It handles TransmitFile 
but does not correctly handle offsets specified in the overlapped structure). I'd support disabling sendfile 
by default and publishing a performance tuning doc.

Bill