Re: [PATCH] Introduce dom0-min-space configuration option

[Ian Jackson <Ian.Jackson@eu.citrix.com>]

Michal Novotny writes ("[Xen-devel] [PATCH] Introduce dom0-min-space configuration option"):
> This is the patch to introduce configuration option called
> dom0-min-space since there were some issues with data inflation
> because of invalid input data stream for zlib decompression.
> The issue occured because of insufficient free space on the dom0 so
> this patch checks the free available space for /var/lib/xen
> and refuses to start up any guests when the space is below
> specified value. Setting up the value to 0 disables the check
> which preserves the behaviour before this patch applied and
> this is the default value for this option.

Thanks for the patch, but I'm not sure I entirely follow.

What "issues with data inflation because of invalid input data stream
for zlib decompression" were there and how do they relate to lack of
space on /var/lib/xen ?

Is this just for the situation where the dom0 filesystem hasn't enough
space to contain the uncompressed version of the domU kernel and
initrd which are to be loaded ?

Your patch just raises an error.  Why does the situation in which the
patch is needed not already raise an appropriate error ?  Perhaps it
would be better to arrange that it does.

Ian.