Hi all,
I wonder whether anyone could use the pktcddvd device without killing
random jobs (due to sudden out of memory or better memory leaks in
pktcddvd) and finally a complete freeze of the machine ?
To reproduce just create an udf filesystem on some dvdrw, mount it rw
and copy some large file to the mount point.
Do others also see this behaviour and if so is this going to be fixed
soon - or am I alone with that problem ?
Soeren.
--
Sometimes, there's a moment as you're waking, when you become aware of
the real world around you, but you're still dreaming.
On 5 Apr 2005, Soeren Sonnenburg whispered secretively:
> I wonder whether anyone could use the pktcddvd device without killing
> random jobs (due to sudden out of memory or better memory leaks in
> pktcddvd) and finally a complete freeze of the machine ?
I'm using it without difficulty.
> To reproduce just create an udf filesystem on some dvdrw, mount it rw
> and copy some large file to the mount point.
Well, I copied a 502Mb file to a CD/RW yesterday as part of my
regular backups. No problems.
I think we need more details (a .config would be nice, and preferably
a cat of /proc/slabinfo and a dmesg dump when the problem starts).
--
This is like system("/usr/funky/bin/perl -e 'exec sleep 1'");
--- Peter da Silva
On Tue, 2005-04-05 at 18:04 +0100, Nix wrote:
> On 5 Apr 2005, Soeren Sonnenburg whispered secretively:
> > I wonder whether anyone could use the pktcddvd device without killing
> > random jobs (due to sudden out of memory or better memory leaks in
> > pktcddvd) and finally a complete freeze of the machine ?
>
> I'm using it without difficulty.
>
> > To reproduce just create an udf filesystem on some dvdrw, mount it rw
> > and copy some large file to the mount point.
>
> Well, I copied a 502Mb file to a CD/RW yesterday as part of my
> regular backups. No problems.
>
> I think we need more details (a .config would be nice, and preferably
> a cat of /proc/slabinfo and a dmesg dump when the problem starts).
.config is attached (gzipped) and dmesg see below. unfortunately I
cannot provide a cat of /proc/slabinfo after the problem started...
however this machine has like 1.5G mem 2G swap and was doing no serious
stuff, i.e. no high load no high memory requirements (I guess <500M)
Soeren
pktcdvd: inserted media is DVD+RW
pktcdvd: write speed 2822kB/s
pktcdvd: 4590208kB available on disc
UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', timestamp 2005/03/27 18:49 (103c)
rtc: lost some interrupts at 1024Hz.
rtc: lost some interrupts at 1024Hz.
rtc: lost some interrupts at 1024Hz.
rtc: lost some interrupts at 1024Hz.
oom-killer: gfp_mask=0xd0
DMA per-cpu:
cpu 0 hot: low 2, high 6, batch 1
cpu 0 cold: low 0, high 2, batch 1
Normal per-cpu:
cpu 0 hot: low 32, high 96, batch 16
cpu 0 cold: low 0, high 32, batch 16
HighMem per-cpu:
cpu 0 hot: low 32, high 96, batch 16
cpu 0 cold: low 0, high 32, batch 16
Free pages: 28944kB (896kB HighMem)
Active:46742 inactive:158822 dirty:666 writeback:114320 unstable:0 free:7236 slab:18648 mapped:44732 pagetables:845
DMA free:3960kB min:584kB low:728kB high:876kB active:1996kB inactive:1104kB present:16384kB pages_scanned:3747 all_unreclaimable? yes
lowmem_reserve[]: 0 880 1519
Normal free:24088kB min:32180kB low:40224kB high:48268kB active:5780kB inactive:167540kB present:901120kB pages_scanned:29844 all_unreclaimable? no
lowmem_reserve[]: 0 0 5119
HighMem free:896kB min:512kB low:640kB high:768kB active:179192kB inactive:466644kB present:655344kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
DMA: 0*4kB 1*8kB 1*16kB 1*32kB 1*64kB 0*128kB 1*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 3960kB
Normal: 0*4kB 1*8kB 1*16kB 0*32kB 0*64kB 0*128kB 2*256kB 0*512kB 1*1024kB 1*2048kB 5*4096kB = 24088kB
HighMem: 62*4kB 7*8kB 5*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 896kB
Swap cache: add 35451, delete 35184, find 371/482, race 0+0
Free swap = 1838852kB
Total swap = 1975976kB
Out of Memory: Killed process 18330 (cat).
oom-killer: gfp_mask=0xd0
DMA per-cpu:
cpu 0 hot: low 2, high 6, batch 1
cpu 0 cold: low 0, high 2, batch 1
Normal per-cpu:
cpu 0 hot: low 32, high 96, batch 16
cpu 0 cold: low 0, high 32, batch 16
HighMem per-cpu:
cpu 0 hot: low 32, high 96, batch 16
cpu 0 cold: low 0, high 32, batch 16
Free pages: 35628kB (832kB HighMem)
Active:51650 inactive:151150 dirty:48 writeback:112458 unstable:0 free:8907 slab:18596 mapped:45563 pagetables:830
DMA free:3996kB min:584kB low:728kB high:876kB active:0kB inactive:1108kB present:16384kB pages_scanned:1587 all_unreclaimable? yes
lowmem_reserve[]: 0 880 1519
Normal free:30800kB min:32180kB low:40224kB high:48268kB active:16732kB inactive:147212kB present:901120kB pages_scanned:342208 all_unreclaimable? yes
lowmem_reserve[]: 0 0 5119
HighMem free:832kB min:512kB low:640kB high:768kB active:189868kB inactive:456280kB present:655344kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
DMA: 9*4kB 1*8kB 1*16kB 1*32kB 1*64kB 0*128kB 1*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 3996kB
Normal: 284*4kB 696*8kB 2*16kB 0*32kB 0*64kB 0*128kB 2*256kB 0*512kB 1*1024kB 1*2048kB 5*4096kB = 30800kB
HighMem: 0*4kB 38*8kB 1*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 832kB
Swap cache: add 38465, delete 35875, find 1174/1602, race 0+0
Free swap = 1837744kB
Total swap = 1975976kB
Out of Memory: Killed process 18326 (cat).
oom-killer: gfp_mask=0xd0
DMA per-cpu:
cpu 0 hot: low 2, high 6, batch 1
cpu 0 cold: low 0, high 2, batch 1
Normal per-cpu:
cpu 0 hot: low 32, high 96, batch 16
cpu 0 cold: low 0, high 32, batch 16
HighMem per-cpu:
cpu 0 hot: low 32, high 96, batch 16
cpu 0 cold: low 0, high 32, batch 16
Free pages: 35632kB (832kB HighMem)
Active:51606 inactive:151149 dirty:48 writeback:112458 unstable:0 free:8908 slab:18596 mapped:45514 pagetables:826
DMA free:4000kB min:584kB low:728kB high:876kB active:4kB inactive:1104kB present:16384kB pages_scanned:495 all_unreclaimable? no
lowmem_reserve[]: 0 880 1519
Normal free:30800kB min:32180kB low:40224kB high:48268kB active:16732kB inactive:147212kB present:901120kB pages_scanned:342208 all_unreclaimable? yes
lowmem_reserve[]: 0 0 5119
HighMem free:832kB min:512kB low:640kB high:768kB active:189688kB inactive:456280kB present:655344kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
DMA: 10*4kB 1*8kB 1*16kB 1*32kB 1*64kB 0*128kB 1*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 4000kB
Normal: 284*4kB 696*8kB 2*16kB 0*32kB 0*64kB 0*128kB 2*256kB 0*512kB 1*1024kB 1*2048kB 5*4096kB = 30800kB
HighMem: 0*4kB 38*8kB 1*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 832kB
Swap cache: add 38465, delete 35875, find 1174/1602, race 0+0
Free swap = 1837744kB
Total swap = 1975976kB
Out of Memory: Killed process 18327 (vdr).
--
Sometimes, there's a moment as you're waking, when you become aware of
the real world around you, but you're still dreaming.
Soeren Sonnenburg <[email protected]> writes:
> On Tue, 2005-04-05 at 18:04 +0100, Nix wrote:
> > On 5 Apr 2005, Soeren Sonnenburg whispered secretively:
> > > I wonder whether anyone could use the pktcddvd device without killing
> > > random jobs (due to sudden out of memory or better memory leaks in
> > > pktcddvd) and finally a complete freeze of the machine ?
> >
> > I'm using it without difficulty.
> >
> > > To reproduce just create an udf filesystem on some dvdrw, mount it rw
> > > and copy some large file to the mount point.
> >
> > Well, I copied a 502Mb file to a CD/RW yesterday as part of my
> > regular backups. No problems.
> >
> > I think we need more details (a .config would be nice, and preferably
> > a cat of /proc/slabinfo and a dmesg dump when the problem starts).
>
> .config is attached (gzipped) and dmesg see below. unfortunately I
> cannot provide a cat of /proc/slabinfo after the problem started...
>From config.gz:
# Linux kernel version: 2.6.11
ONFIG_CDROM_PKTCDVD=y
CONFIG_CDROM_PKTCDVD_BUFFERS=32
# CONFIG_CDROM_PKTCDVD_WCACHE is not set
> however this machine has like 1.5G mem 2G swap and was doing no serious
> stuff, i.e. no high load no high memory requirements (I guess <500M)
...
> pktcdvd: inserted media is DVD+RW
> pktcdvd: write speed 2822kB/s
> pktcdvd: 4590208kB available on disc
> UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', timestamp 2005/03/27 18:49 (103c)
> rtc: lost some interrupts at 1024Hz.
> rtc: lost some interrupts at 1024Hz.
> rtc: lost some interrupts at 1024Hz.
> rtc: lost some interrupts at 1024Hz.
> oom-killer: gfp_mask=0xd0
> DMA per-cpu:
> cpu 0 hot: low 2, high 6, batch 1
> cpu 0 cold: low 0, high 2, batch 1
> Normal per-cpu:
> cpu 0 hot: low 32, high 96, batch 16
> cpu 0 cold: low 0, high 32, batch 16
> HighMem per-cpu:
> cpu 0 hot: low 32, high 96, batch 16
> cpu 0 cold: low 0, high 32, batch 16
>
> Free pages: 28944kB (896kB HighMem)
> Active:46742 inactive:158822 dirty:666 writeback:114320 unstable:0 free:7236 slab:18648 mapped:44732 pagetables:845
> DMA free:3960kB min:584kB low:728kB high:876kB active:1996kB inactive:1104kB present:16384kB pages_scanned:3747 all_unreclaimable? yes
> lowmem_reserve[]: 0 880 1519
> Normal free:24088kB min:32180kB low:40224kB high:48268kB active:5780kB inactive:167540kB present:901120kB pages_scanned:29844 all_unreclaimable? no
> lowmem_reserve[]: 0 0 5119
> HighMem free:896kB min:512kB low:640kB high:768kB active:179192kB inactive:466644kB present:655344kB pages_scanned:0 all_unreclaimable? no
> lowmem_reserve[]: 0 0 0
> DMA: 0*4kB 1*8kB 1*16kB 1*32kB 1*64kB 0*128kB 1*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 3960kB
> Normal: 0*4kB 1*8kB 1*16kB 0*32kB 0*64kB 0*128kB 2*256kB 0*512kB 1*1024kB 1*2048kB 5*4096kB = 24088kB
> HighMem: 62*4kB 7*8kB 5*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 896kB
> Swap cache: add 35451, delete 35184, find 371/482, race 0+0
> Free swap = 1838852kB
> Total swap = 1975976kB
> Out of Memory: Killed process 18330 (cat).
I don't know how the OOM killer is supposed to work, but I think it's
strange that it is triggered when there is 28MB RAM available and when
"writeback" is 114320, which means that a lot more memory will become
available by just waiting for the I/O to complete.
--
Peter Osterlund - [email protected]
http://web.telia.com/~u89404340