From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1BX2ft-00062d-O4 for user-mode-linux-devel@lists.sourceforge.net; Sun, 06 Jun 2004 11:47:17 -0700 Received: from pop.gmx.de ([213.165.64.20] helo=mail.gmx.net) by sc8-sf-mx1.sourceforge.net with smtp (Exim 4.30) id 1BX2fs-0003Zi-Hl for user-mode-linux-devel@lists.sourceforge.net; Sun, 06 Jun 2004 11:47:16 -0700 Message-ID: <114001c44bf7$b69ca120$2000000a@schlepptopp> From: "roland" MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Subject: [uml-devel] Re: [uml-user] SuSE 9.1 host + 2.4.26 Kernel + GCC 3.3.3 similarities to 2.6.6!? Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Sun, 6 Jun 2004 20:54:32 +0200 To: uml , uml-user Cc: user-mode-linux-devel@lists.sourceforge.net, Jeff Dike , blaisorblade_spam@yahoo.it answering myself: via google i found: >Two different xterms emulators dumping core ... I'd be concerned a >wee bit. One note, do not compile with excessive optimizations and >especially -fschedule-insns and -fschedule-insns2 is the right way <- !!! >to produce faulty code with all gcc / egcs releases since 2.8.0 <- !!! >on I86 machines. Not that it would make much sense with a terminal >emulator anyway, but even so. and: >linked to the Pentium Pro Blas single processor library. If -fschedule-insns >is included four examples - 06, 07, 09 and 30 fail, 06 and 09 with segmentation <-- !!! >fault and 09 and 30 with a message that "SCALAR MECHINES SHOULD NOT CALL JKGNMV". >The performance is sometimes better and sometimes worse over the 31 examples, but >these are really too small for a proper bennch mark. and: > ..so I guess the problem is not the classic --fschedule-insns bug. and: http://www.linux-mips.org/archives/linux-mips/2004-03/msg00032.html could please someone try putting -fno-schedule-insns (and maybe -fno-schedule-insns2) into the Makefile(s) and try again ? regards roland ----- Original Message ----- From: "roland" To: "uml" ; "uml-user" Cc: Sent: Sunday, June 06, 2004 8:22 PM Subject: Re: [uml-user] SuSE 9.1 host + 2.4.26 Kernel + GCC 3.3.3 similarities to 2.6.6!? > hi! > > As well, I encountered the same memory problems -- it wouldn't recognize > > more than 32M! > > > > Can anyone else confirm? (Roland?) > i can at least confirm that 2.4 uml kernel has O1/O2 compile issues too - > got the same hang at "Init 3...." on suse9/9.1 as in 2.6.6. > > afaik, these symptoms are known "compile issues": > - hang after "Checking for /proc/mm..." > - hang after "Init...." > - command line options not being recognized (mem is no more than 32M,umid > not being recognized....) > - terminal being unusable after shutdown/halt - needs "reset" > - uml processes left running after shutdown/halt > - further...? > > as -O2 Options break down into: > > -fforce-mem -foptimize-sibling-calls -fstrength-reduce > -fcse-follow-jumps -fcse-skip-blocks -frerun-cse-after-loop > -frerun-loop-opt -fgcse -fgcse-lm -fgcse-sm > -fdelete-null-pointer-checks -fexpensive-optimizations -fregmov > -fschedule-insns -fschedule-insns2 -fsched-interblock -fsched-spec > -fcaller-saves -fpeephole2 -freorder-blocks -freorder-functions > -fstrict-aliasing -falign-functions -falign-jumps -falign-loops > -falign-labels > > just someone needs to dig into that, which of these optimizations result in a > "corrupt" uml binary. maybe it's only one - maybe several ones. > does someone have a compile farm to "trial and error" this very quickly ? ;) > > regards > roland > > > ----- Original Message ----- > From: "uml" > To: "uml-user" > Sent: Sunday, June 06, 2004 7:15 PM > Subject: [uml-user] SuSE 9.1 host + 2.4.26 Kernel + GCC 3.3.3 similarities to 2.6.6!? > > > > For the sake of discussion/argument/curiosity, I decided to compile 2.4.26 > > on SuSE9.1 with a slackware root_fs (9.1)... > > > > Guess what I encountered that was similar to the 2.6.6 kernel compilation?? > > > > I had to replace every instance of -O2 with -O1 in order for it to run. I > > am beginning to question the compiler rather than UML now. I'm using GCC > > 3.3.3 (default). > > > > As well, I encountered the same memory problems -- it wouldn't recognize > > more than 32M! > > > > Can anyone else confirm? (Roland?) > > > > The host is SMP, but UML is NOT compiled for SMP support. > > > > Here's the total procedure I used: > > ---8<--- > > #!/bin/sh > > cd /tmp > > wget http://www.kernel.org/pub/linux/kernel/v2.4/linux-2.4.26.tar.bz2 > > wget > > http://umn.dl.sourceforge.net/sourceforge/user-mode-linux/uml-patch-2.4.26-1.bz2 > > tar -xjvf linux-2.4.26.tar.bz2 > > cd linux-2.4.26 > > bzcat /tmp/uml-patch-2.4.26-1.bz2 | patch -p1 > > make menuconfig ARCH=um [turn on COW support -- but that's the only change > > from default!] > > perl -e 's/-O2/-O1/gi' -p -i.bak Makefile arch/um/Makefile > > make linux modules ARCH=um > > strip linux > > cp linux ../linux-2.4.26 > > cd .. > > ./linux-2.4.26 ubd0=slack91.cow,slack91.img mem=128M eth0=tuntap,tap2 > > umid=slack91test > > ---8<--- > > > > Without the 'perl -e 's/-O2/-O1/gi' -p -i.bak Makefile arch/um/Makefile' > > substitutions, it will compile, but I experience the same issues I do with > > 2.6.6. > > > > Ideas? > > > > > > > > ------------------------------------------------------- > > This SF.Net email is sponsored by the new InstallShield X. > > From Windows to Linux, servers to mobile, InstallShield X is the one > > installation-authoring solution that does it all. Learn more and > > evaluate today! http://www.installshield.com/Dev2Dev/0504 > > _______________________________________________ > > User-mode-linux-user mailing list > > User-mode-linux-user@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user > > ------------------------------------------------------- This SF.Net email is sponsored by the new InstallShield X. >From Windows to Linux, servers to mobile, InstallShield X is the one installation-authoring solution that does it all. Learn more and evaluate today! http://www.installshield.com/Dev2Dev/0504 _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel