Fwd: Re: Heads up if your running Fedora w/ a 2.6.27 kernel

[Oron Peled]

Hi,

Actually, as it is an upstream issue, it may interest not
only Fedora people but anybody with recent kernels.

----------  Forwarded Message  ----------
Subject: Re: Heads up if your running Fedora w/ a 2.6.27 kernel
Date: Tuesday, 27 בJanuary 2009
From: Jan Kasprzak <kas at fi.muni.cz>

J.H. wrote:
> Just a quick heads up to any mirror that is running a 2.6.27 kernel.  If 
> you are seeing segfaults in Apache like the following:
> 
> [Tue Jan 27 04:45:21 2009] [notice] child pid 5322 exit signal 
> Segmentation fault (11)
> ...
> and can't explain what's going on, there was a recent kernel change that 
> effects epoll (which Apache switched to a while back) and causes you, by 
> default, to only have 129 children running before Apache's children 
> would segfault.
> 
> https://issues.apache.org/bugzilla/show_bug.cgi?id=46467
> 
> Just thought I'd share since I can't be the only one who has hit this in 
> the last couple of weeks.

I ran into this a while ago, straced apache, and fixed it using
  echo 'fs.epoll.max_user_instances = 1024' >> /etc/sysctl.conf
  sysctl -p

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Oron Peled                                 Voice: +972-4-8228492
oron at actcom.co.il                  http://www.actcom.co.il/~oron
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