[libvirt] [PATCH] Allow to dynamically set the size of the debug buffer

This is the part allowing to dynamically resize the debug log buffer from it's default 64kB size. The buffer is now dynamically allocated. It adds a new API virLogSetBufferSize() which resizes the buffer (possibly dynamically but in that case the existing content is lost - the complexity wasn't looking like worth it). If passed a zero size, the buffer is deallocated and we do the small optimization of not formatting messages which are not output anymore. On the daemon side, it just adds a new option log_buffer_size to libvirtd.conf and call virLogSetBufferSize() if needed (minor pbm of the GET_CONF_* macros is you can't guess if the value was set or not) Seems to work fine, I tried to keep the code as simple as needed, this allowed me to find out that on a quiet daemon startup we emit half a megabyte of debug log ! The next patch missing now is the update of the documentation for the log buffer. Daniel -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel(a)veillard.com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/