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Message-ID: <430B01FB.2070903@davyandbeth.com>
Date: Tue, 23 Aug 2005 06:01:15 -0500
From: Davy Durham <pubaddr2@davyandbeth.com>
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To: bert hubert <bert.hubert@netherlabs.nl>
CC: linux-kernel@vger.kernel.org
Subject: Re: select() efficiency / epoll
References: <42E162B6.2000602@davyandbeth.com> <20050722212454.GB18988@outpost.ds9a.nl> <430AF11A.5000303@davyandbeth.com> <20050823182405.GA21301@outpost.ds9a.nl>
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bert hubert wrote:

>On Tue, Aug 23, 2005 at 04:49:14AM -0500, Davy Durham wrote:
>
>  
>
>>However, I'm getting segfaults because some pointers in places are 
>>getting set to low integer values (which didn't used to have those values).
>>    
>>
>
>epoll is pretty heavily benchmarked and hence tested. I don't entirely
>understand the remark above and suggest looking at the generated core dumps.
>
>  
>
I just mean that when  I debug and catch the segv, it's dies because 
some pointers now have corrupted values.  (usually because something is 
overwriting some memory some where)

I'm currently re-writing some code to make it use select() instead of 
epoll_wait() and see if everything is suddently fixed.  If so, then I 
will suspect that epoll has a problem.  But it's still not ruled out 
being my fault since it could be a timing issue that makes the crash 
show up.