Re: [Xen-devel] oxenstored: Add support for logging via syslog

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2013-03-20 at 10:32 +0000, David Scott wrote:
> The ability to log via syslog was removed back in Oct 2011 but
> it's actually quite useful. On a system with lots of disk I/O, if
> xenstore logs directly to the filesystem it can block so much
> that guests start to suffer.
> 
> One solution would be to add some threading to xenstored to isolate
> the logging from the ring servicing; however this will be quite a
> big patch and we could end up re-implementing a syslog-like logging
> service. Instead we re-add the ability to log via syslog and allow
> this to be switched on via the xenstored config file. The default
> logging behaviour is unchanged.
> 
> FYI this is the only significant thing in the XCP patch queue --
> we've found this helps a lot in stress tests.
> 
> Patches follow. For extra convenience you should be able to pull from:
> 
> git pull git://github.com/djs55/xen xenstore-syslog

I'm not really in a position to review this but as you say it is just
reintroducing previously removed code and its been in XCP I presume in
the interval, so I have pulled this.




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