From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Date: Fri, 19 Nov 2004 22:58:44 +0000 Subject: Re: [ANNOUNCE] udev 046 release Message-Id: <20041119225844.GD18211@kroah.com> List-Id: References: <20041118224411.GA10876@kroah.com> In-Reply-To: <20041118224411.GA10876@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org On Fri, Nov 19, 2004 at 11:00:40AM +0100, Alex Riesen wrote: > On Fri, 19 Nov 2004 10:58:53 +0100, Alex Riesen wrote: > > On Thu, 18 Nov 2004 14:44:12 -0800, Greg KH wrote: > > > I've released the 046 version of udev. It can be found at: > > > kernel.org/pub/linux/utils/kernel/hotplug/udev-046.tar.gz > > > > I just put const's at some places. It cut down data segments, but > > increased code size. > > Overall still smaller: What version of gcc are you using that causes this to happen? And why does it happen? Why does the compiler think it can pack these structures better if they are const *? > > -rwxr-xr-x 1 user users 50420 Nov 19 10:53 ../udev-046/udev > > -rwxr-xr-x 1 user users 49556 Nov 19 10:53 udev > > text data bss dec hex filename > > 47245 968 22480 70693 11425 ../udev-046/udev > > 48089 104 22064 70257 11271 udev > > > > Also, the instance of utsname in udev_lib.c is used only once. > > forgot the patch... > * utsname used only once > * consts help gcc pack the object tighter > > diff -upr udev-046/udev_lib.c udev-046-1/udev_lib.c > --- udev-046/udev_lib.c 2004-11-18 20:39:15.000000000 +0100 > +++ udev-046-1/udev_lib.c 2004-11-19 10:33:23.885019143 +0100 > @@ -65,12 +65,12 @@ void udev_set_values(struct udevice *ude > > int kernel_release_satisfactory(int version, int patchlevel, int sublevel) > { > - static struct utsname uts; > static int kversion = 0; > static int kpatchlevel; > static int ksublevel; > > if (kversion = 0) { > + struct utsname uts; > if (uname(&uts) != 0) > return -1; > No, this should be fixed up to only call uname once. We do call it multiple times from the same program, and that could be optimized. thanks, greg k-h ------------------------------------------------------- This SF.Net email is sponsored by: InterSystems CACHE FREE OODBMS DOWNLOAD - A multidimensional database that combines robust object and relational technologies, making it a perfect match for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8 _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel