Re: PROBLEM: block loop device hangs
Em Sat, Mar 03, 2001 at 09:06:30AM -0600, Steven Brooks escreveu: > When mounting a file using the loopback device, the mount program hangs > for ever. Other than that, the system is still usable. > > Dist: Redhat-7 > Kernel: 2.4.2 (compiled with kgcc, i.e. egcs-2.91.66) FAQ, try 2.4.2-ac10, several fixes to looback device - Arnaldo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: PROBLEM: block loop device hangs
On Sat, Mar 03 2001, Steven Brooks wrote: > When mounting a file using the loopback device, the mount program hangs > for ever. Other than that, the system is still usable. Please read lkml archives before posting, this problem has been all over the list for the past two weeks. Use the latest 2.4.2-ac or wait for 2.4.3-pre2 -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
PROBLEM: block loop device hangs
When mounting a file using the loopback device, the mount program hangs
for ever. Other than that, the system is still usable.
Dist: Redhat-7
Kernel: 2.4.2 (compiled with kgcc, i.e. egcs-2.91.66)
CPU: Pentium II 400
Mem: 128MB RAM + 512MB swap
(More information below)
For me, it is 100% reproducable, no matter what I try to mount:
1. an ISO image from a Win2000 FAT32 partition, from hdb
(IDE/ATAPI drive)
2. an ext2 image from an ext2 partition, from hdb (IDE/ATAPI
drive)
3. an ext2 image from a Win2000 FAT32 partition, from hda
(a different IDE/ATAPI drive)
The simplest way for me to reproduce it is:
dd if=/dev/zero of=t bs=1024k count=1
mke2fs t
mount -o loop t /mnt/cdrom
Mount then hangs, and never recovers. I cannot even kill it using
kill -9.
An strace of mount shows (they all die in the exact same place):
[...]
open("t", O_RDWR) = 3
open("/dev/loop0", O_RDWR) = 4
mlockall(0x3, 0xb848) = 0
ioctl(4, LOOP_SET_FD, 0x3) = 0
ioctl(4, LOOP_SET_STATUS, 0xb828) = 0
close(4)= 0
close(3)= 0
rt_sigprocmask(SIG_BLOCK, ~[TRAP SEGV], NULL, 8) = 0
stat64("/dev/loop0", {st_mode=S_IFBLK|0660, st_rdev=makedev(7,
0), ...}) = 0
open("/dev/loop0", O_RDONLY)= 3
lseek(3, 1024, SEEK_SET)= 1024
read(3,
(The last line is left unfinished by strace.)
ps auwx shows:
[...]
root 818 0.0 1.2 1564 1548 pts/0DL 08:44 0:00 mount -o
loop t /mnt/cdrom
[...]
I have lots of memory available; free shows:
totalusedfree sharedbuffers cached
Mem:127156 1248842272 0 1914049148
-/+ buffers/cache: 56596 70560
Swap: 530104 60 530044
Other than that, the system is still fine. I can umount and mount
other, real block devices (attempting to mount another loopback just
causes another process to hang).
I can't keep up with the kernel traffic. If you need any more
information, please e-mail me directly.
Thanks,
Steven
/proc/version:
Linux version 2.4.2 (root@minneyar) (gcc version egcs-2.91.66
19990314/Linux (egcs-1.1.2 release)) #5 Fri Mar 2 08:09:35 CST 2001
/proc/cpuinfo:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 5
model name : Pentium II (Deschutes)
stepping: 3
cpu MHz : 399.327
cache size : 512 KB
fdiv_bug: no
hlt_bug : no
f00f_bug: no
coma_bug: no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca
cmov pat pse36 mmx fxsr
bogomips: 796.26
/proc/modules:
loop7584 2 (autoclean)
tdfx 53104 1
nfsd 70992 8 (autoclean)
lockd 49744 1 (autoclean) [nfsd]
sunrpc 59136 1 (autoclean) [nfsd lockd]
8139too15104 1 (autoclean)
agpgart13952 1
nls_iso8859-1 2832 2 (autoclean)
nls_cp437 4352 2 (autoclean)
vfat 11504 2 (autoclean)
fat31744 0 (autoclean) [vfat]
es1371 26832 0
soundcore 3856 4 [es1371]
ac97_codec 7920 0 [es1371]
usb-uhci 22544 0 (unused)
usbcore47408 1 [usb-uhci]
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
PROBLEM: block loop device hangs
When mounting a file using the loopback device, the mount program hangs
for ever. Other than that, the system is still usable.
Dist: Redhat-7
Kernel: 2.4.2 (compiled with kgcc, i.e. egcs-2.91.66)
CPU: Pentium II 400
Mem: 128MB RAM + 512MB swap
(More information below)
For me, it is 100% reproducable, no matter what I try to mount:
1. an ISO image from a Win2000 FAT32 partition, from hdb
(IDE/ATAPI drive)
2. an ext2 image from an ext2 partition, from hdb (IDE/ATAPI
drive)
3. an ext2 image from a Win2000 FAT32 partition, from hda
(a different IDE/ATAPI drive)
The simplest way for me to reproduce it is:
dd if=/dev/zero of=t bs=1024k count=1
mke2fs t
mount -o loop t /mnt/cdrom
Mount then hangs, and never recovers. I cannot even kill it using
kill -9.
An strace of mount shows (they all die in the exact same place):
[...]
open("t", O_RDWR) = 3
open("/dev/loop0", O_RDWR) = 4
mlockall(0x3, 0xb848) = 0
ioctl(4, LOOP_SET_FD, 0x3) = 0
ioctl(4, LOOP_SET_STATUS, 0xb828) = 0
close(4)= 0
close(3)= 0
rt_sigprocmask(SIG_BLOCK, ~[TRAP SEGV], NULL, 8) = 0
stat64("/dev/loop0", {st_mode=S_IFBLK|0660, st_rdev=makedev(7,
0), ...}) = 0
open("/dev/loop0", O_RDONLY)= 3
lseek(3, 1024, SEEK_SET)= 1024
read(3,
(The last line is left unfinished by strace.)
ps auwx shows:
[...]
root 818 0.0 1.2 1564 1548 pts/0DL 08:44 0:00 mount -o
loop t /mnt/cdrom
[...]
I have lots of memory available; free shows:
totalusedfree sharedbuffers cached
Mem:127156 1248842272 0 1914049148
-/+ buffers/cache: 56596 70560
Swap: 530104 60 530044
Other than that, the system is still fine. I can umount and mount
other, real block devices (attempting to mount another loopback just
causes another process to hang).
I can't keep up with the kernel traffic. If you need any more
information, please e-mail me directly.
Thanks,
Steven
/proc/version:
Linux version 2.4.2 (root@minneyar) (gcc version egcs-2.91.66
19990314/Linux (egcs-1.1.2 release)) #5 Fri Mar 2 08:09:35 CST 2001
/proc/cpuinfo:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 5
model name : Pentium II (Deschutes)
stepping: 3
cpu MHz : 399.327
cache size : 512 KB
fdiv_bug: no
hlt_bug : no
f00f_bug: no
coma_bug: no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca
cmov pat pse36 mmx fxsr
bogomips: 796.26
/proc/modules:
loop7584 2 (autoclean)
tdfx 53104 1
nfsd 70992 8 (autoclean)
lockd 49744 1 (autoclean) [nfsd]
sunrpc 59136 1 (autoclean) [nfsd lockd]
8139too15104 1 (autoclean)
agpgart13952 1
nls_iso8859-1 2832 2 (autoclean)
nls_cp437 4352 2 (autoclean)
vfat 11504 2 (autoclean)
fat31744 0 (autoclean) [vfat]
es1371 26832 0
soundcore 3856 4 [es1371]
ac97_codec 7920 0 [es1371]
usb-uhci 22544 0 (unused)
usbcore47408 1 [usb-uhci]
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: PROBLEM: block loop device hangs
Em Sat, Mar 03, 2001 at 09:06:30AM -0600, Steven Brooks escreveu: When mounting a file using the loopback device, the mount program hangs for ever. Other than that, the system is still usable. Dist: Redhat-7 Kernel: 2.4.2 (compiled with kgcc, i.e. egcs-2.91.66) FAQ, try 2.4.2-ac10, several fixes to looback device - Arnaldo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
