Date: Fri, 6 Aug 2010 13:08:08 +0200 From: Marius Strobl <marius@alchemy.franken.de> To: Kostik Belousov <kostikbel@gmail.com> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org>, Jeremie Le Hen <jeremie@le-hen.org>, nwhitehorn@freebsd.org Subject: Re: Avoiding sysctl at program startup using ELF aux vector (was: concurrent sysctl implementation) Message-ID: <20100806110807.GA68489@alchemy.franken.de> In-Reply-To: <20100806090404.GI22295@deviant.kiev.zoral.com.ua> References: <20100806050633.GK14016@felucia.tataz.chchile.org> <20100806090404.GI22295@deviant.kiev.zoral.com.ua>
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On Fri, Aug 06, 2010 at 12:04:04PM +0300, Kostik Belousov wrote: > On Fri, Aug 06, 2010 at 07:06:33AM +0200, Jeremie Le Hen wrote: > > Hi Kib, > > > > In-Reply-To: <20100629083901.GG13238@deviant.kiev.zoral.com.ua> > > On Tue, Jun 29, 2010 at 11:39:01AM +0300, Kostik Belousov wrote: > > > On Tue, Jun 29, 2010 at 10:26:39AM +0200, Marius Strobl wrote: > > > > On Mon, Jun 28, 2010 at 05:48:59PM +0300, Kostik Belousov wrote: > > > > > On Wed, Jun 23, 2010 at 11:09:59PM +0200, Jeremie Le Hen wrote: > > > > > > Hi Kostik, > > > > > > > > > > > > This patch seems to have faded out from memory. Is it possible to go > > > > > > forward and commit it? > > > > > I refreshed the patch. Hopefully, nobody will object, and I commit it > > > > > shortly. > > > > > > > > > > > > > > > > > Thanks, > > > > > > Regards. > > > > > > > > > > > > On Sat, Jul 25, 2009 at 12:29:16AM +0300, Kostik Belousov wrote: > > > > > > > Below is the prototype that seems to work for me both with patched and > > > > > > > old rtld on i386. Patch also contains bits for amd64 that I did not > > > > > > > tested yet. All other arches are not buildable for now. > > > > > > > > > > > > > > Patch completely eliminates sysctl syscalls from the rtld and libc > > > > > > > startup. Without the patch, a single run of /bin/ls did 6 sysctls, > > > > > > > with the patch, no sysctls is queried at all. > > > > > > > > > > > > Comparing with the originally posted patch, I added support for all > > > > > architectures, tested amd64 and ia32 on amd64, and converted getpagesizes(3) > > > > > that added two more startup sysctls. > > > > > > > > > > Would be nice to get a testing for at least some !x86 architectures > > > > > before the commit, I added some people who helped me in past, to the Cc:. > > > > > > > > > > > > > Doesn't look good on sparc64: > > > > <...> > > > > NFS ROOT: 192.168.1.40:/usr/data/nfsroot/sparc64 > > > > dc1: link state changed to UP > > > > pid 24 (ifconfig), uid 0: exited on signal 11 > > > > Segmentation fault > > > > Interface IP-Address Broadcast > > > > pid 29 (rcorder), uid 0: exited on signal 11 > > > > Segmentation fault > > > > pid 30 (grep), uid 0: exited on signal 11 > > > > Segmentation fault > > > > pid 31 (rcorder), uid 0: exited on signal 11 > > > > Segmentation fault > > > > > > > > pid 32 (date), uid 0: exited on signal 11 > > > > Segmentation fault > > > > Jun 29 12:20:50 getty[36]: open /dev/ttyv3: No such file or directory > > > > <...> > > > > > > > > Unfortunately, I currently lack the time to debug this. > > > > > > Thank you. > > > > Did yu have time to look at this problem? It would be nice to have this > > in the tree. > > I cannot move forward without the help from somebody having access to > sparc64 system where the problem is reproducable. Do you have a debug version of the patch which outputs the necessary information? Marius
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