Hi all!
When accessing NFS (server on a Linux box running 2.2.21, client on Solaris 8) I've encountered a following problem: attempt to copy a not-so-small file (around 150MB) from cdrom leads to nfsd crash after some time (depends on transport and network load) with file being only partially copied. The crash occurs regardless of either of NFS version (v2,v3) or transport (UDP,TCP).
Cause this problem never happened to me on 2.2.20, I spent some time to eventually find a 'solution' which is as simple as using mm/vmscan.c from 2.2.20 (changing the position of a call to shrink_dcache_memory() in fact). I'm not a kernel hacker (not yet :) ) but looks like VM issue rather than NFS to me.
Below I post a standard lk bug report (assumig NFS v2 over UDP when not stated otherwise).
Regards
Michal
########
[1.] nfsd crash
[2.] Copying a large file from cdrom drive on a Linux NFS server running kernel 2.2.21 leads to nfsd crash. Crash occurs always, regardless of NFS settings (version, transport).
[3.] nfsd, kernel
[4.] /proc/version:
Linux version 2.2.21 (root@nbmic) (gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) #1 Tue Jun 18 15:03:18 CEST 2002
[5.1] ksymoops for NFS UDP v2:
WARNING: This version of ksymoops is obsolete.
[5.2] ksymoops for NFS TCP v3:
WARNING: This version of ksymoops is obsolete.
[6.] server: 'mount' cdrom and 'exportfs' with defaults; client: 'mount' share and 'cp' a file from share to local filesystem
[7.1] ver_linux:
Linux nbmic 2.2.21 #1 Tue Jun 18 15:03:18 CEST 2002 i686 unknown
[7.2] /proc/cpuinfo:
processor : 0
[7.3] /proc/modules:
nfsd 182080 4
[7.4] Not a SCSI system (neither native nor emulated).
[7.5] Linux kernel is generic 2.2.21 with ext3 v0.0.7a patch applied. One 128MB swap partition. ALSA and PCMCIA used. Machine is Toshiba Satellite Pro 4270 with 128MB RAM and 100Mbit Xircom (16bit) PCMCIA network card.
[8.] Workaround: changing the position of a call to shrink_dcache_memory() in mm/vmscan.c as it was in lk 2.2.20 eliminates the problem.
This archive was generated by hypermail 2b29
: Sun Jun 23 2002 - 22:00:21 EST
WARNING: The current version can be obtained from ftp://ftp.
Options used: -V (specified)
-o /lib/modules/2.2.21/ (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-m /boot/System.map-2.2.21 (specified)
-c 1 (default)
Jun 18 16:19:25 nbmic kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000010
Jun 18 16:19:25 nbmic kernel: current->tss.cr3 = 00101000, %%cr3 = 00101000
Jun 18 16:19:25 nbmic kernel: *pde = 00000000
Jun 18 16:19:25 nbmic kernel: Oops: 0000
Jun 18 16:19:25 nbmic kernel: CPU: 0
Jun 18 16:19:25 nbmic kernel: EIP: 0010:[<c89c484c>]
Jun 18 16:19:25 nbmic kernel: EFLAGS: 00010246
Jun 18 16:19:25 nbmic kernel: eax: 00000000 ebx: 00000000 ecx: c7fb5610 edx: 00000010
Jun 18 16:19:25 nbmic kernel: esi: c6b64300 edi: c6b64280 ebp: c6b64100 esp: c4d6fe08
Jun 18 16:19:25 nbmic kernel: ds: 0018 es: 0018 ss: 0018
Jun 18 16:19:25 nbmic kernel: Process nfsd (pid: 386, process nr: 31, stackpage=c4d6f000)
Jun 18 16:19:25 nbmic kernel: Stack: c89c4bea c6b64280 c4e9a7e0 c70aa400 01000000 c4cbc000 c70aad34 c017539a
Jun 18 16:19:25 nbmic kernel: c6b64100 00000000 c89c4e29 c70aac00 c4e9a7e0 00000001 c70aa400 c4cbc000
Jun 18 16:19:25 nbmic kernel: c4e9a7e0 c4e9a7e0 c4e9a844 00000004 c70aa400 c89c5c74 c70aa400 c4e9a7e0
Jun 18 16:19:25 nbmic kernel: Call Trace: [<c017539a>] [<c0185aff>] [<c01129db>] [<c016ee63>] [<c016eee6>] [<c016adfe>] [<c0108b3f>]
Jun 18 16:19:25 nbmic kernel: Code: 8b 40 10 39 d0 74 1b 8d 58 c8 39 f3 75 0e 8b 5a 04 83 c3 c8
>>EIP: c89c484c <END_OF_CODE+49b20/????>
Trace: c017539a <ip_build_xmit+4a/30c>
Trace: c0185aff <inet_sendmsg+83/90>
Trace: c01129db <update_process_times+5b/64>
Trace: c016ee63 <qdisc_restart+13/6c>
Trace: c016eee6 <qdisc_run_queues+2a/5c>
Trace: c016adfe <net_bh+26/1dc>
Trace: c0108b3f <kernel_thread+23/30>
Code: c89c484c <END_OF_CODE+49b20/????> 0000000000000000 <_EIP>: <===
Code: c89c484c <END_OF_CODE+49b20/????> 0: 8b 40 10 mov 0x10(%eax),%eax <===
Code: c89c484f <END_OF_CODE+49b23/????> 3: 39 d0 cmp %edx,%eax
Code: c89c4851 <END_OF_CODE+49b25/????> 5: 74 1b je c89c486e <END_OF_CODE+49b42/????>
Code: c89c4853 <END_OF_CODE+49b27/????> 7: 8d 58 c8 lea 0xffffffc8(%eax),%ebx
Code: c89c4856 <END_OF_CODE+49b2a/????> a: 39 f3 cmp %esi,%ebx
Code: c89c4858 <END_OF_CODE+49b2c/????> c: 75 0e jne c89c4868 <END_OF_CODE+49b3c/????>
Code: c89c485a <END_OF_CODE+49b2e/????> e: 8b 5a 04 mov 0x4(%edx),%ebx
Code: c89c485d <END_OF_CODE+49b31/????> 11: 83 c3 c8 add $0xffffffc8,%ebx
125 warnings and 2 errors issued. Results may not be reliable.
WARNING: The current version can be obtained from ftp://ftp.
Options used: -V (specified)
-o /lib/modules/2.2.21/ (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-m /boot/System.map-2.2.21 (specified)
-c 1 (default)
Jun 19 08:42:51 nbmic kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000010
Jun 19 08:42:51 nbmic kernel: current->tss.cr3 = 00101000, %%cr3 = 00101000
Jun 19 08:42:51 nbmic kernel: *pde = 00000000
Jun 19 08:42:51 nbmic kernel: Oops: 0000
Jun 19 08:42:51 nbmic kernel: CPU: 0
Jun 19 08:42:51 nbmic kernel: EIP: 0010:[<c89c484c>]
Jun 19 08:42:51 nbmic kernel: EFLAGS: 00010246
Jun 19 08:42:51 nbmic kernel: eax: 00000000 ebx: 00000000 ecx: c7fac798 edx: 00000010
Jun 19 08:42:51 nbmic kernel: esi: c6d004a0 edi: c6d00520 ebp: c6d005a0 esp: c4ef7df0
Jun 19 08:42:51 nbmic kernel: ds: 0018 es: 0018 ss: 0018
Jun 19 08:42:51 nbmic kernel: Process nfsd (pid: 398, process nr: 32, stackpage=c4ef7000)
Jun 19 08:42:51 nbmic kernel: Stack: c89c4bea c6d00520 c4ec4144 c7211200 01000000 c4e46800 c56ae334 c4dcd3c0
Jun 19 08:42:51 nbmic kernel: c6d005a0 00000000 c89c4e29 c56ae200 c4ec4144 00000001 c7211200 c4e46800
Jun 19 08:42:51 nbmic kernel: c4ec4144 c4ec4144 c4ec41a8 00000004 00007d78 c89c5c74 c7211200 c4ec4144
Jun 19 08:42:51 nbmic kernel: Call Trace: [<c01780a4>] [<c0185a64>] [<c0166baa>] [<c01859f0>] [<c0108b3f>]
Jun 19 08:42:51 nbmic kernel: Code: 8b 40 10 39 d0 74 1b 8d 58 c8 39 f3 75 0e 8b 5a 04 83 c3 c8
>>EIP: c89c484c <END_OF_CODE+44b20/????>
Trace: c01780a4 <tcp_recvmsg+4dc/4ec>
Trace: c0185a64 <inet_recvmsg+74/8c>
Trace: c0166baa <sock_recvmsg+42/b4>
Trace: c01859f0 <inet_recvmsg+0/8c>
Trace: c0108b3f <kernel_thread+23/30>
Code: c89c484c <END_OF_CODE+44b20/????> 0000000000000000 <_EIP>: <===
Code: c89c484c <END_OF_CODE+44b20/????> 0: 8b 40 10 mov 0x10(%eax),%eax <===
Code: c89c484f <END_OF_CODE+44b23/????> 3: 39 d0 cmp %edx,%eax
Code: c89c4851 <END_OF_CODE+44b25/????> 5: 74 1b je c89c486e <END_OF_CODE+44b42/????>
Code: c89c4853 <END_OF_CODE+44b27/????> 7: 8d 58 c8 lea 0xffffffc8(%eax),%ebx
Code: c89c4856 <END_OF_CODE+44b2a/????> a: 39 f3 cmp %esi,%ebx
Code: c89c4858 <END_OF_CODE+44b2c/????> c: 75 0e jne c89c4868 <END_OF_CODE+44b3c/????>
Code: c89c485a <END_OF_CODE+44b2e/????> e: 8b 5a 04 mov 0x4(%edx),%ebx
Code: c89c485d <END_OF_CODE+44b31/????> 11: 83 c3 c8 add $0xffffffc8,%ebx
127 warnings and 2 errors issued. Results may not be reliable.
Gnu C 2.95.3
Gnu make 3.79.1
binutils 2.11.90.0.19
util-linux 2.11f
mount 2.11b
modutils 2.4.6
e2fsprogs 1.27
reiserfsprogs 3.x.0j
pcmcia-cs 3.1.33
PPP 2.4.1
Linux C Library 2.2.3
Dynamic linker (ldd) 2.2.3
Procps 2.0.7
Net-tools 1.60
Kbd 1.06
Sh-utils 2.0
Modules Loaded nfsd irda_deflate irda af_packet snd-seq-midi snd-card-ymfpci snd-opl3 snd-hwdep snd-mpu401-uart xirc2ps_cs snd-rawmidi snd-seq-oss snd-seq-midi-event snd-seq snd-seq-device snd-pcm-oss snd-pcm-plugin snd-mixer-oss snd-ymfpci snd-pcm snd-timer snd-ac97-codec snd-mixer snd soundcore ds i82365 pcmcia_core i2c-dev i2c-piix4 adm1021 i2c-proc i2c-core lt_serial lt_modem toshiba floppy ufs smbfs nfs lockd sunrpc dummy usb-uhci usbcore ppp_deflate ppp slip slhc lp parport_pc parport nls_iso8859-2 nls_cp437
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Celeron (Coppermine)
stepping : 1
cpu MHz : 497.565
cache size : 128 KB
fdiv_bug : no
hlt_bug : no
sep_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 sse
bogomips : 992.87
af_packet 6048 2 (autoclean)
xirc2ps_cs 13408 1
snd-seq-midi 3152 0 (autoclean) (unused)
snd-card-ymfpci 4672 0 (autoclean)
snd-opl3 4144 0 (autoclean) [snd-card-ymfpci]
snd-hwdep 2896 0 (autoclean) [snd-opl3]
snd-mpu401-uart 2144 0 (autoclean) [snd-card-ymfpci]
snd-rawmidi 8736 0 (autoclean) [snd-seq-midi snd-mpu401-uart]
snd-seq-oss 22656 0 (unused)
snd-seq-midi-event 2640 0 [snd-seq-midi snd-seq-oss]
snd-seq 36224 0 [snd-seq-midi snd-seq-oss snd-seq-midi-event]
snd-seq-device 3632 0 [snd-seq-midi snd-rawmidi snd-seq-oss snd-seq]
snd-pcm-oss 17248 0 (unused)
snd-pcm-plugin 14384 0 [snd-pcm-oss]
snd-mixer-oss 4160 0 [snd-pcm-oss]
snd-ymfpci 36112 0 [snd-card-ymfpci]
snd-pcm 28160 0 [snd-pcm-oss snd-pcm-plugin snd-ymfpci]
snd-timer 7760 0 [snd-opl3 snd-seq snd-pcm]
snd-ac97-codec 24448 0 [snd-ymfpci]
snd-mixer 22400 0 [snd-mixer-oss snd-ymfpci snd-ac97-codec]
snd 33776 1 [snd-seq-midi snd-card-ymfpci snd-opl3 snd-hwdep snd-mpu401-uart snd-rawmidi snd-seq-oss snd-seq-midi-event snd-seq snd-seq-device snd-pcm-oss snd-pcm-plugin snd-mixer-oss snd-ymfpci snd-pcm snd-timer snd-ac97-codec snd-mixer]
soundcore 2384 8 [snd]
ds 6256 2 [xirc2ps_cs]
i82365 21040 2
pcmcia_core 38144 0 [xirc2ps_cs ds i82365]
i2c-dev 3520 0 (unused)
i2c-piix4 3760 0 (unused)
adm1021 5520 0 (unused)
i2c-proc 5584 0 [adm1021]
i2c-core 12736 0 [i2c-dev i2c-piix4 adm1021 i2c-proc]
lt_serial 17168 0 (unused)
lt_modem 314400 0 [lt_serial]
toshiba 2400 0
floppy 46192 0
ufs 56592 0 (unused)
smbfs 26592 0 (unused)
nfs 72880 0 (unused)
lockd 44368 1 [nfsd nfs]
sunrpc 60704 1 [nfsd nfs lockd]
dummy 960 0 (unused)
usb-uhci 19040 0 (unused)
usbcore 47824 0 [usb-uhci]
ppp_deflate 40960 0 (unused)
ppp 20144 0 [ppp_deflate]
slip 6048 0 (unused)
slhc 4432 0 [ppp slip]
lp 5232 0 (unused)
parport_pc 7472 1
parport 7104 1 [lp parport_pc]
nls_iso8859-2 2928 2 (autoclean)
nls_cp437 3920 1 (autoclean)
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