Hi, Could you paste the output of sysrq+t here? Thanks!
-----Original Message----- From: Johannes Hirte [mailto:johannes.hi...@fem.tu-ilmenau.de] Sent: Wednesday, February 02, 2011 7:35 AM To: Zhong, Xin Cc: Maria Wikström; linux-btrfs@vger.kernel.org Subject: Re: [PATCH v2]Btrfs: pwrite blocked when writing from the mmaped buffer of the same page On Friday 28 January 2011 04:53:24 Zhong, Xin wrote: > Could you describe the steps to recreate it? > It will be a great help for me to look further. Thanks! It's a little strange. I have to systems with btrfs, both Gentoo-based. One is affected by this bug the other is not. On the affected system it is enough to do a 'emerge dev-libs/libgcrypt' that should normaly compile and install libgcrypt. The emerge command is part of portage, the package management of Gentoo. The strace output looks similar to the one from Maria: open("/home/tmp/portage/dev-libs/libgcrypt-1.4.6/.ipc_in", O_RDONLY| O_NONBLOCK|O_LARGEFILE) = 3 fstat64(3, {st_mode=S_IFIFO|0770, st_size=0, ...}) = 0 ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0xbff5f678) = -1 EINVAL (Invalid argument) open("/dev/ptmx", O_RDWR) = 5 ioctl(5, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(5, TIOCGPTN, [2]) = 0 stat64("/dev/pts/2", {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 2), ...}) = 0 getuid32() = 0 ioctl(5, TIOCSPTLCK, [0]) = 0 ioctl(5, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(5, TIOCGPTN, [2]) = 0 stat64("/dev/pts/2", {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 2), ...}) = 0 open("/dev/pts/2", O_RDWR|O_NOCTTY) = 6 ioctl(6, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(6, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(6, SNDCTL_TMR_START or SNDRV_TIMER_IOCTL_TREAD or TCSETS, {B38400 -opost isig icanon echo ...}) = 0 ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 stat64("/root/.terminfo", 0xbff5e790) = -1 ENOENT (No such file or directory) stat64("/etc/terminfo", {st_mode=S_IFDIR|0755, st_size=14, ...}) = 0 access("/etc/terminfo/x/xterm", R_OK) = 0 open("/etc/terminfo/x/xterm", O_RDONLY|O_LARGEFILE) = 7 read(7, "\32\0010\0&\0\17\0\235\1l\5xterm|xterm terminal"..., 4097) = 3258 close(7) = 0 ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 ioctl(1, TIOCGWINSZ, {ws_row=40, ws_col=207, ws_xpixel=0, ws_ypixel=0}) = 0 access("/usr/local/sbin/stty", X_OK) = -1 ENOENT (No such file or directory) access("/usr/local/bin/stty", X_OK) = -1 ENOENT (No such file or directory) access("/usr/sbin/stty", X_OK) = -1 ENOENT (No such file or directory) access("/usr/bin/stty", X_OK) = -1 ENOENT (No such file or directory) access("/sbin/stty", X_OK) = -1 ENOENT (No such file or directory) access("/bin/stty", X_OK) = 0 stat64("/bin/stty", {st_mode=S_IFREG|0755, st_size=58836, ...}) = 0 clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xb753d728) = 2752 waitpid(2752, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0) = 2752 --- SIGCHLD (Child exited) @ 0 (0) --- fcntl64(5, F_GETFL) = 0x2 (flags O_RDWR) fcntl64(5, F_SETFL, O_RDWR|O_NONBLOCK) = 0 fstat64(5, {st_mode=S_IFCHR|0666, st_rdev=makedev(5, 2), ...}) = 0 ioctl(5, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 -opost isig icanon echo ...}) = 0 open("/home/tmp/portage/dev-libs/libgcrypt-1.4.6/temp/build.log", O_WRONLY| O_CREAT|O_APPEND|O_LARGEFILE, 0666) = 7 fstat64(7, {st_mode=S_IFREG|0660, st_size=480, ...}) = 0 _llseek(7, 0, [480], SEEK_END) = 0 ioctl(7, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0xbff5fad8) = -1 ENOTTY (Inappropriate ioctl for device) fstat64(7, {st_mode=S_IFREG|0660, st_size=480, ...}) = 0 _llseek(7, 0, [480], SEEK_CUR) = 0 stat64("/home/tmp/portage/dev-libs/libgcrypt-1.4.6/temp/build.log", {st_mode=S_IFREG|0660, st_size=480, ...}) = 0 dup(1) = 8 fstat64(8, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0 ioctl(8, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 fstat64(8, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0 _llseek(8, 0, 0xbff5f820, SEEK_CUR) = -1 ESPIPE (Illegal seek) stat64("/home/tmp/portage/dev-libs/libgcrypt-1.4.6/temp/environment", {st_mode=S_IFREG|0664, st_size=106597, ...}) = 0 clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xb753d728) = 2753 close(6) = 0 gettimeofday({1296577457, 11117}, NULL) = 0 poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 1 ([{fd=5, revents=POLLIN}]) read(5, ">>> Preparing source in /home/tm"..., 4096) = 92 write(8, ">>> Preparing source in /home/tm"..., 92) = 92 write(7, ">>> Preparing source in /home/tm"..., 92) = 92 poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000) = 0 (Timeout) poll([{fd=3, events=POLLIN|POLLERR|POLLHUP|POLLNVAL}, {fd=5, events=POLLIN| POLLERR|POLLHUP|POLLNVAL}], 2, 3000 <unfinished ...>
