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Re: [libvirt] [PATCHv2 15/16] save: support bypass-cache flag in libvirt-guests init script



On Tue, Jul 19, 2011 at 10:20:38PM -0600, Eric Blake wrote:
> libvirt-guests is a perfect use case for bypassing the file system
> cache - lots of filesystem traffic done at system shutdown, where
> caching is pointless, and startup, where reading large files only
> once just gets in the way.  Make this a configurable option in the
> init script, but defaulting to existing behavior.
> 
> * tools/libvirt-guests.sysconf (BYPASS_CACHE): New variable.
> * tools/libvirt-guests.init.sh (start, suspend_guest): Use it.
> ---
> 
> merge 10 and 18 of v1, rename SAVE_DIRECT to BYPASS_CACHE
> 
>  tools/libvirt-guests.init.sh |   10 ++++++++--
>  tools/libvirt-guests.sysconf |    5 +++++
>  2 files changed, 13 insertions(+), 2 deletions(-)

ACK


Side note: we need to figure out something better than this horrible
shell script for autostart/autoshutdown, so that we fit in better
with systemd.

We might want to come up with a custom 'virsh host-shutdown' and
'virsh host-startup' command, which would let us write a really
trivial systemd unit file to do this, avoiding the horrible shell
code.

Daniel
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