From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.12] helo=sc8-sf-mx2.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Cipher TLSv1:DES-CBC3-SHA:168) (Exim 3.31-VA-mm2 #1 (Debian)) id 1APTH1-0004kx-00 for ; Thu, 27 Nov 2003 13:02:03 -0800 Received: from mail.gmx.net ([213.165.64.20]) by sc8-sf-mx2.sourceforge.net with smtp (Exim 4.24) id 1APTH0-0001yw-L0 for user-mode-linux-devel@lists.sourceforge.net; Thu, 27 Nov 2003 13:02:02 -0800 Message-ID: <002101c3b52a$4a42ede0$2000000a@schlepptopp> From: "roland" References: <5.1.0.14.2.20031127102518.02675b90@mail.inboxprotection.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Subject: [uml-devel] uml 2.6.0-test9 crash Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: Date: Thu, 27 Nov 2003 22:06:01 +0100 Content-Transfer-Encoding: quoted-printable To: user-mode-linux-user@lists.sourceforge.net, user-mode-linux-devel@lists.sourceforge.net hi !=B4 i think , i`m able to crash my uml. :( i did some stress-testing with my uml-2.6.0-test9 on 2.6.0-test9-skas host = and i unfortunately seem able to crash it very easily. this was the way i recognized it: first i executed while true;do find /;done >/dev/zero & several times and all worked well. watched that with "top" inside the uml and found dozens of "finds" sharing = the cpu as expected(spending most of their time on system calls indeed). on host, cpu usage of uml went to ~99% - all fine so far. then i thought: mhhhh - ok - eat THIS: while true;do dd if=3D/dev/zero of=3Dtest.dat bs=3D1k count=3D10000;done & after executing this, my uml got stuck. no output, no response to input - e= ven a ping to the uml didn`t=B4give back a sign of life. the uml didn`t crash or = panic - it just gets stuck and unresponsive - uml process remains at 99% on the host. at a second, third, fourth try, i isolated the problem a little bit: one or two non looped "dd if=3D/dev/zero of=3Dtest.dat bs=3D1k count=3D1000= 0" just are enough to produce the same result.(under 2.6.0test9-skas-host and ALSO under 2.4.2= 2-99-default suse9 host, rootfs inside uml is suse9) is anybody able to reproduce this? if so - what do do further for analyzing? i could make the uml downloadable and could send some output from strace (i= f i attach strace to the remaining "99% cpu hog", it exits very quickly with a SIGALARM) maybe an uml bug or even an issue for lkml? regards roland ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/ _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel