/proc/sys/fs/epoll/max_user_instances=128 considered harmful

[Joe Orton]

On Wed, Jan 07, 2009 at 05:01:22PM -0500, Dave Jones wrote:
> On Wed, Jan 07, 2009 at 03:18:12PM +0000, Joe Orton wrote:
>  > The F10 kernel has /proc/sys/fs/epoll/max_user_instances set to 128 by 
>  > default.  Apache httpd uses one epoll fd ("instance") per child process, 
>  > so this sets a hard limit on 128 children (i.e. 100 concurrent clients) 
>  > out of the box.
>  > 
>  > 1) shouldn't this be an rlimit so that we can bump it appropriately in 
>  > the parent as root?
> 
> possibly.  It's a question better asked on linux-kernel really. 
> 
> This does sound like a better change to me than forcing the sysctl change
> on everyone.

Well, it's effectively a regression as-is.  Any chance someone from the 
kernel team can chase this upstream?

Regards, Joe