From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261213AbVFCLDv (ORCPT ); Fri, 3 Jun 2005 07:03:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261215AbVFCLDv (ORCPT ); Fri, 3 Jun 2005 07:03:51 -0400 Received: from tron.kn.vutbr.cz ([147.229.191.152]:62981 "EHLO tron.kn.vutbr.cz") by vger.kernel.org with ESMTP id S261213AbVFCLDl (ORCPT ); Fri, 3 Jun 2005 07:03:41 -0400 Message-ID: <42A0390A.2050303@stud.feec.vutbr.cz> Date: Fri, 03 Jun 2005 13:03:38 +0200 From: Michal Schmidt User-Agent: Debian Thunderbird 1.0.2 (X11/20050506) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Ingo Molnar CC: Parag Warudkar , linux-kernel@vger.kernel.org Subject: Re: RT patch breaks X86_64 build References: <200505302201.48123.kernel-stuff@comcast.net> <429BFF51.4000401@stud.feec.vutbr.cz> <200505310753.49447.kernel-stuff@comcast.net> <429C530E.70704@stud.feec.vutbr.cz> <20050601091344.GB11703@elte.hu> <429EFB66.8030909@stud.feec.vutbr.cz> <20050602123927.GB10878@elte.hu> <429F4A19.7030508@stud.feec.vutbr.cz> <20050602183343.GB30309@elte.hu> <429F8C00.3070803@stud.feec.vutbr.cz> <20050603051821.GC14059@elte.hu> In-Reply-To: <20050603051821.GC14059@elte.hu> Content-Type: multipart/mixed; boundary="------------030307090009030907040301" X-Spam-Flag: NO X-Spam-Report: Spam detection software, running on the system "tron.kn.vutbr.cz", has tested this incoming email. See other headers to know if the email has beed identified as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or block similar future email. If you have any questions, see the administrator of that system for details. ____ Content analysis details: (-4.2 points, 6.0 required) ____ pts rule name description ---- ---------------------- -------------------------------------------- 0.7 FROM_ENDS_IN_NUMS From: ends in numbers -4.9 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] 0.0 UPPERCASE_25_50 message body is 25-50% uppercase ____ Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This is a multi-part message in MIME format. --------------030307090009030907040301 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Ingo Molnar wrote: > perhaps my mcount stubs dont save enough registers, leading to register > corruption on 64-bit userspace? In that case i'd expect more breakage > though, so maybe it's something more subtle. I got an strace of 64-bit bash segfaulting under x86_64 kernel with LATENCY_TRACE. For comparison I also attach an strace output of the same bash running under a kernel without LATENCY_TRACE. Michal --------------030307090009030907040301 Content-Type: text/plain; name="bashtrace" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="bashtrace" execve("/bin/bash.real", ["bash.real"], [/* 15 vars */]) = 0 uname({sys="Linux", node="k4-912b", ...}) = 0 brk(0) = 0x5c1000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY) = -1 ENOENT (No such file or directory) open("/lib/tls/x86_64/libncurses.so.5", O_RDONLY) = -1 ENOENT (No such file or directory) stat("/lib/tls/x86_64", 0x7fffffb38440) = -1 ENOENT (No such file or directory) open("/lib/tls/libncurses.so.5", O_RDONLY) = -1 ENOENT (No such file or directory) stat("/lib/tls", 0x7fffffb38440) = -1 ENOENT (No such file or directory) open("/lib/x86_64/libncurses.so.5", O_RDONLY) = -1 ENOENT (No such file or directory) stat("/lib/x86_64", 0x7fffffb38440) = -1 ENOENT (No such file or directory) open("/lib/libncurses.so.5", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\371\1\0"..., 640) = 640 fstat(3, {st_mode=S_IFREG|0644, st_size=365776, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaaaaac0000 mmap(NULL, 1415952, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2aaaaabc3000 mprotect(0x2aaaaac0b000, 1121040, PROT_NONE) = 0 mmap(0x2aaaaad0a000, 73728, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x47000) = 0x2aaaaad0a000 mmap(0x2aaaaad1c000, 2832, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2aaaaad1c000 close(3) = 0 open("/lib/libdl.so.2", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\22\0\0"..., 640) = 640 fstat(3, {st_mode=S_IFREG|0644, st_size=11464, ...}) = 0 mmap(NULL, 1058136, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2aaaaad1d000 mprotect(0x2aaaaad1f000, 1049944, PROT_NONE) = 0 mmap(0x2aaaaae1f000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x2aaaaae1f000 close(3) = 0 open("/lib/libc.so.6", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\313\1\0"..., 640) = 640 fstat(3, {st_mode=S_IFREG|0644, st_size=1287456, ...}) = 0 mmap(NULL, 2345768, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2aaaaae20000 mprotect(0x2aaaaaf41000, 1162024, PROT_NONE) = 0 mmap(0x2aaaab041000, 98304, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x121000) = 0x2aaaab041000 mmap(0x2aaaab059000, 15144, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2aaaab059000 close(3) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaaab05d000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaaab05e000 arch_prctl(ARCH_SET_FS, 0x2aaaab05dd50) = 0 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 open("/dev/tty", O_RDWR|O_NONBLOCK) = -1 ENOENT (No such file or directory) ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 brk(0) = 0x5c1000 brk(0x5c2000) = 0x5c2000 brk(0x5c4000) = 0x5c4000 readlink("/proc/self/fd/0", 0x5c2008, 4095) = -1 ENOENT (No such file or directory) fstat(0, {st_mode=S_IFCHR|0600, st_rdev=makedev(4, 1), ...}) = 0 stat("/dev/pts", 0x7fffffb38a70) = -1 ENOENT (No such file or directory) stat("/dev/vc", 0x7fffffb38a70) = -1 ENOENT (No such file or directory) stat("/dev/tts", 0x7fffffb38a70) = -1 ENOENT (No such file or directory) open("/dev", O_RDONLY|O_NONBLOCK|O_DIRECTORY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/locale-archive", O_RDONLY) = -1 ENOENT (No such file or directory) brk(0x5c5000) = 0x5c5000 open("/usr/share/locale/locale.alias", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs_CZ.UTF-8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs_CZ.utf8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs_CZ/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs.UTF-8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs.utf8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) getuid() = 0 getgid() = 0 geteuid() = 0 getegid() = 0 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 --- SIGSEGV (Segmentation fault) @ 0 (0) --- +++ killed by SIGSEGV +++ --------------030307090009030907040301 Content-Type: text/plain; name="bashtrace.ok" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="bashtrace.ok" execve("/bin/bash.real", ["bash.real"], [/* 15 vars */]) = 0 uname({sys="Linux", node="k4-912b", ...}) = 0 brk(0) = 0x5c1000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY) = -1 ENOENT (No such file or directory) open("/lib/tls/x86_64/libncurses.so.5", O_RDONLY) = -1 ENOENT (No such file or directory) stat("/lib/tls/x86_64", 0x7fffffab5bc0) = -1 ENOENT (No such file or directory) open("/lib/tls/libncurses.so.5", O_RDONLY) = -1 ENOENT (No such file or directory) stat("/lib/tls", 0x7fffffab5bc0) = -1 ENOENT (No such file or directory) open("/lib/x86_64/libncurses.so.5", O_RDONLY) = -1 ENOENT (No such file or directory) stat("/lib/x86_64", 0x7fffffab5bc0) = -1 ENOENT (No such file or directory) open("/lib/libncurses.so.5", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\371\1\0"..., 640) = 640 fstat(3, {st_mode=S_IFREG|0644, st_size=365776, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaaaaac0000 mmap(NULL, 1415952, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2aaaaabc3000 mprotect(0x2aaaaac0b000, 1121040, PROT_NONE) = 0 mmap(0x2aaaaad0a000, 73728, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x47000) = 0x2aaaaad0a000 mmap(0x2aaaaad1c000, 2832, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2aaaaad1c000 close(3) = 0 open("/lib/libdl.so.2", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\22\0\0"..., 640) = 640 fstat(3, {st_mode=S_IFREG|0644, st_size=11464, ...}) = 0 mmap(NULL, 1058136, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2aaaaad1d000 mprotect(0x2aaaaad1f000, 1049944, PROT_NONE) = 0 mmap(0x2aaaaae1f000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x2aaaaae1f000 close(3) = 0 open("/lib/libc.so.6", O_RDONLY) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\313\1\0"..., 640) = 640 fstat(3, {st_mode=S_IFREG|0644, st_size=1287456, ...}) = 0 mmap(NULL, 2345768, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x2aaaaae20000 mprotect(0x2aaaaaf41000, 1162024, PROT_NONE) = 0 mmap(0x2aaaab041000, 98304, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x121000) = 0x2aaaab041000 mmap(0x2aaaab059000, 15144, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2aaaab059000 close(3) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaaab05d000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaaab05e000 arch_prctl(ARCH_SET_FS, 0x2aaaab05dd50) = 0 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 open("/dev/tty", O_RDWR|O_NONBLOCK) = -1 ENOENT (No such file or directory) ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 brk(0) = 0x5c1000 brk(0x5c2000) = 0x5c2000 brk(0x5c4000) = 0x5c4000 readlink("/proc/self/fd/0", 0x5c2008, 4095) = -1 ENOENT (No such file or directory) fstat(0, {st_mode=S_IFCHR|0600, st_rdev=makedev(4, 1), ...}) = 0 stat("/dev/pts", 0x7fffffab61f0) = -1 ENOENT (No such file or directory) stat("/dev/vc", 0x7fffffab61f0) = -1 ENOENT (No such file or directory) stat("/dev/tts", 0x7fffffab61f0) = -1 ENOENT (No such file or directory) open("/dev", O_RDONLY|O_NONBLOCK|O_DIRECTORY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/locale-archive", O_RDONLY) = -1 ENOENT (No such file or directory) brk(0x5c5000) = 0x5c5000 open("/usr/share/locale/locale.alias", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs_CZ.UTF-8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs_CZ.utf8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs_CZ/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs.UTF-8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs.utf8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/locale/cs/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory) getuid() = 0 getgid() = 0 geteuid() = 0 getegid() = 0 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(2, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 brk(0x5c6000) = 0x5c6000 open("/etc/mtab", O_RDONLY) = -1 ENOENT (No such file or directory) open("/etc/fstab", O_RDONLY) = -1 ENOENT (No such file or directory) open("/proc/meminfo", O_RDONLY) = -1 ENOENT (No such file or directory) brk(0x5c7000) = 0x5c7000 rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0 rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0 ...and so on, continues without problems --------------030307090009030907040301--