Complete hang while doing IO

pepijndevos · 10-13-2012, 09:35 AM

I'm trying to install Arch in a chroot by mashing together http://archlinuxarm.org/forum/viewto...e0e161707274e4 and https://www.mobileread.com/forums/showthread.php?t=96048

First time it happened while dd/mkfs'ing the file, later while downloading/extracting the Arch rootfs.

First I thought it was this outbound connection disconnection business, but I don't think that's it, as I disabled netwatchd.

At a seemingly random time, the Kindle UI stops responding. It does not accept new ssh connections, and a while later, the current one dies as well.

In between the first event and the second, I ^C and `ls`, which hanged as well. That reinforces my suspicion it is IO related.

When I replug the Kindle, usb network comes and goes, so something is still running in there, but SSH doesn't work at all. Only thing I can do is hold the power button for a while to reboot.

Any ideas?

twobob · 10-13-2012, 10:08 AM

loop mounts are sketchy, could be the issue. Hopefully someone with more experience in these things might have something to offer.

IIRC something to do with it already being loop mounted. "looping the loop" as it were.

not sure how to solid that up...

knc1 · 10-13-2012, 10:08 AM

You ran out of ram and I don't see in those directions where you have enabled a swap file or swap partition.

What is the model of your machine?

twobob · 10-13-2012, 10:10 AM

I think he is 4 non-touch mate

qlob · 10-13-2012, 10:10 AM

Quote:

Originally Posted by knc1

You ran out of ram and I don't see in those directions where you have enabled a swap file or swap partition.
What is the model of your machine?

He is on a K4 as indicated by the title.

twobob · 10-13-2012, 10:13 AM

Quote:

Originally Posted by qlob

He is on a K4 as indicated by the title.

Didn't notice that

Never do notice the tags

knc1 · 10-13-2012, 10:16 AM

A little bit of confirmation from the O.P. would be nice before I tell him how to break the machine.

twobob · 10-13-2012, 10:32 AM

Quote:

Originally Posted by knc1

A little bit of confirmation from the O.P. would be nice before I tell him how to break the machine.

heh. I am rather liking the thought of ARCH on the kindle. hope he gets it flying. never liked loops though so I won't be trying it. Native or bust! for me

pepijndevos · 10-13-2012, 10:50 AM

Yes, K4 it is.

So the solution is to swapon another loop file?

I'm not sure the solution is RAM, because it also hangs when I extract the rootfs and SCP it to the loop. Maybe I should create the loopfile locally and then put it on the kindle.

If anyone has a good guide on how to get Arch native, that would be a possible future step.

knc1 · 10-13-2012, 10:56 AM

Quote:

Originally Posted by pepijndevos

Yes, K4 it is.

So the solution is to swapon another loop file?

I'm not sure the solution is RAM, because it also hangs when I extract the rootfs and SCP it to the loop. Maybe I should create the loopfile locally and then put it on the kindle.

If anyone has a good guide on how to get Arch native, that would be a possible future step.

Why in the world would you want to put swap in a loop file?

I am sure, you are the one who asked the question.

Build up your runtime image file off-kindle.

geekmaster · 10-13-2012, 11:13 AM

I prefer running loop mounts after booting from diags. More free RAM, so you do not crash quite so soon. K3 main had plenty of free RAM, so no worries there...

pepijndevos · 10-13-2012, 11:48 AM

great idea to run of diags. Just chroot from there... Only, how do I mount the data partition from diags?

I was thinking that since I don't have a swap partition to keep me from running out of memory, I should use a swap file. But I generated the file of-kindle now.

aditya3098 · 10-13-2012, 11:48 AM

Wasn't there a thread about the SAME thing happening on the debian chroot as well? That wasn't no memory issure either, as I tried it with a 1.5gb swapfile...

"Chroot environment locks-up"

twobob · 10-13-2012, 12:02 PM

From my meagre reading of the sources...

if MEM% left drops below 25% the garbage collector is run.

Perhaps there is an issue there. fighting for control. worth a thought.

aditya3098 · 10-13-2012, 12:29 PM

Yes... Which Arch release is this? How new is it? What is the kernel version? Is the Arch kernel newer that the kindles?

10-13-2012, 09:35 AM	#1
pepijndevos Connoisseur Posts: 71 Karma: 23166 Join Date: Sep 2012 Device: Kindle 4NT	Complete hang while doing IO I'm trying to install Arch in a chroot by mashing together http://archlinuxarm.org/forum/viewto...e0e161707274e4 and https://www.mobileread.com/forums/showthread.php?t=96048 First time it happened while dd/mkfs'ing the file, later while downloading/extracting the Arch rootfs. First I thought it was this outbound connection disconnection business, but I don't think that's it, as I disabled netwatchd. At a seemingly random time, the Kindle UI stops responding. It does not accept new ssh connections, and a while later, the current one dies as well. In between the first event and the second, I ^C and `ls`, which hanged as well. That reinforces my suspicion it is IO related. When I replug the Kindle, usb network comes and goes, so something is still running in there, but SSH doesn't work at all. Only thing I can do is hold the power button for a while to reboot. Any ideas?

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10-13-2012, 10:08 AM	#2
twobob ( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr Posts: 6,586 Karma: 6299991 Join Date: Jun 2012 Location: uti gratia usura (Yao ying da ying; Mo ying da yieng) Device: PW-WIFI\|K5-3G+WIFI\| K4\|K3-3G\|DXG\|K2\| Rooted Nook Touch	loop mounts are sketchy, could be the issue. Hopefully someone with more experience in these things might have something to offer. IIRC something to do with it already being loop mounted. "looping the loop" as it were. not sure how to solid that up...

10-13-2012, 10:08 AM	#3
knc1 Going Viral Posts: 17,212 Karma: 18210809 Join Date: Feb 2012 Location: Central Texas Device: No K1, PW2, KV, KOA	You ran out of ram and I don't see in those directions where you have enabled a swap file or swap partition. What is the model of your machine?

10-13-2012, 10:10 AM	#4
twobob ( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr Posts: 6,586 Karma: 6299991 Join Date: Jun 2012 Location: uti gratia usura (Yao ying da ying; Mo ying da yieng) Device: PW-WIFI\|K5-3G+WIFI\| K4\|K3-3G\|DXG\|K2\| Rooted Nook Touch	I think he is 4 non-touch mate

10-13-2012, 10:16 AM	#7
knc1 Going Viral Posts: 17,212 Karma: 18210809 Join Date: Feb 2012 Location: Central Texas Device: No K1, PW2, KV, KOA	A little bit of confirmation from the O.P. would be nice before I tell him how to break the machine.

10-13-2012, 10:50 AM	#9
pepijndevos Connoisseur Posts: 71 Karma: 23166 Join Date: Sep 2012 Device: Kindle 4NT	Yes, K4 it is. So the solution is to swapon another loop file? I'm not sure the solution is RAM, because it also hangs when I extract the rootfs and SCP it to the loop. Maybe I should create the loopfile locally and then put it on the kindle. If anyone has a good guide on how to get Arch native, that would be a possible future step.

10-13-2012, 11:13 AM	#11
geekmaster Carpe diem, c'est la vie. Posts: 6,433 Karma: 10773668 Join Date: Nov 2011 Location: Multiverse 6627A Device: K1 to PW3	I prefer running loop mounts after booting from diags. More free RAM, so you do not crash quite so soon. K3 main had plenty of free RAM, so no worries there...

10-13-2012, 11:48 AM	#12
pepijndevos Connoisseur Posts: 71 Karma: 23166 Join Date: Sep 2012 Device: Kindle 4NT	great idea to run of diags. Just chroot from there... Only, how do I mount the data partition from diags? I was thinking that since I don't have a swap partition to keep me from running out of memory, I should use a swap file. But I generated the file of-kindle now.

10-13-2012, 11:48 AM	#13
aditya3098 Guru Posts: 608 Karma: 1588610 Join Date: Jan 2012 Device: Kindle Scribe	Wasn't there a thread about the SAME thing happening on the debian chroot as well? That wasn't no memory issure either, as I tried it with a 1.5gb swapfile... "Chroot environment locks-up"

10-13-2012, 12:02 PM	#14
twobob ( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr Posts: 6,586 Karma: 6299991 Join Date: Jun 2012 Location: uti gratia usura (Yao ying da ying; Mo ying da yieng) Device: PW-WIFI\|K5-3G+WIFI\| K4\|K3-3G\|DXG\|K2\| Rooted Nook Touch	From my meagre reading of the sources... if MEM% left drops below 25% the garbage collector is run. Perhaps there is an issue there. fighting for control. worth a thought.

10-13-2012, 12:29 PM	#15
aditya3098 Guru Posts: 608 Karma: 1588610 Join Date: Jan 2012 Device: Kindle Scribe	Yes... Which Arch release is this? How new is it? What is the kernel version? Is the Arch kernel newer that the kindles?