Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
'cp' keeps getting stuck...
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index Other Things Gentoo
View previous topic :: View next topic  
Author Message
Utoxin
Guru
Guru


Joined: 19 Apr 2002
Posts: 411
Location: Springville, UT

PostPosted: Wed Jun 12, 2002 9:30 pm    Post subject: 'cp' keeps getting stuck... Reply with quote

Several times in the last couple days, when copying things as root, the cp process has hung, and the process refuses to die, even when killed with a -9. Eventually, the process dies on it's own, but it takes forever.

My filesystem is XFS, and I'm running with gcc3.1. Anyone have any ideas?
Back to top
View user's profile Send private message
pjp
Administrator
Administrator


Joined: 16 Apr 2002
Posts: 16102
Location: Colorado

PostPosted: Wed Jun 12, 2002 9:32 pm    Post subject: Reply with quote

What are you trying to copy... how large are the files?
_________________
lolgov. 'cause where we're going, you don't have civil liberties.

In Loving Memory
1787 - 2008
Back to top
View user's profile Send private message
lx
Veteran
Veteran


Joined: 28 May 2002
Posts: 1012
Location: Netherlands

PostPosted: Wed Jun 12, 2002 9:40 pm    Post subject: Reply with quote

Well that's one of the reasons I stopped using XFS. Used it on some partitions, and I found out that copying a large file (670Mb), from one partition to another hung the system/cp. Well didn't really fix it, just dumped it for ReiserFS.

Good Luck, lX
_________________
"Remember there's a big difference between kneeling down and bending over.", Frank Zappa
Back to top
View user's profile Send private message
Utoxin
Guru
Guru


Joined: 19 Apr 2002
Posts: 411
Location: Springville, UT

PostPosted: Wed Jun 12, 2002 9:43 pm    Post subject: Reply with quote

Well, the one today is only 21 megs, and the copy process has used up half an hour of processor time so far. Total, it's been running for an hour.
Back to top
View user's profile Send private message
lx
Veteran
Veteran


Joined: 28 May 2002
Posts: 1012
Location: Netherlands

PostPosted: Wed Jun 12, 2002 10:00 pm    Post subject: Reply with quote

Utoxin wrote:
Well, the one today is only 21 megs, and the copy process has used up half an hour of processor time so far. Total, it's been running for an hour.


Well I wasn't that patient (xfs was probably in a loop) I just did CTRL+C and did another cp and it worked. I concluded to dump Xfs.

Cya lX.
_________________
"Remember there's a big difference between kneeling down and bending over.", Frank Zappa
Back to top
View user's profile Send private message
Utoxin
Guru
Guru


Joined: 19 Apr 2002
Posts: 411
Location: Springville, UT

PostPosted: Wed Jun 12, 2002 10:05 pm    Post subject: Reply with quote

I'd do that, but I've got too much time invested in this system to rebuild it.

Anyone have any ideas why this happens, or how to fix it?
Back to top
View user's profile Send private message
klieber
Administrator
Administrator


Joined: 17 Apr 2002
Posts: 3657
Location: San Francisco, CA

PostPosted: Wed Jun 12, 2002 10:52 pm    Post subject: Reply with quote

You say it hangs when copying stuff as root. Does it work fine when copying stuff as a normal user?

Also, I seriously doubt this is the problem, but make sure you have DMA enabled on the device. (hdparm -d /dev/<your partition>)

--kurt
_________________
The problem with political jokes is that they get elected
Back to top
View user's profile Send private message
Utoxin
Guru
Guru


Joined: 19 Apr 2002
Posts: 411
Location: Springville, UT

PostPosted: Thu Jun 13, 2002 12:04 am    Post subject: Reply with quote

klieber wrote:
You say it hangs when copying stuff as root. Does it work fine when copying stuff as a normal user?

Also, I seriously doubt this is the problem, but make sure you have DMA enabled on the device. (hdparm -d /dev/<your partition>)

--kurt

So far, I haven't seen it hang while running as a normal user.

And yes, DMA is enabled.
Back to top
View user's profile Send private message
Utoxin
Guru
Guru


Joined: 19 Apr 2002
Posts: 411
Location: Springville, UT

PostPosted: Thu Jun 13, 2002 12:54 am    Post subject: Reply with quote

Well, I eventually got the thread to die, and started the gcc emerge again (It's what was running when it locked up last.) And lo-and-behold, it locked up on exactly the same file copy the second time. This to me sounds like a bug of somekind in XFS itself. Where would I go to report XFS bugs?
Back to top
View user's profile Send private message
pjp
Administrator
Administrator


Joined: 16 Apr 2002
Posts: 16102
Location: Colorado

PostPosted: Thu Jun 13, 2002 1:47 am    Post subject: Reply with quote

Is it just this one file? Can you try another file of similar size and see if it locks up?
May sound weird, but I had a file one time that crashed a Novell file server whenever
I tried to open it. At the time, we didn't know this, but it was eventually discovered
that it was this one file. After recreating the file with essentially the same contents,
the problem never reoccurred.
_________________
lolgov. 'cause where we're going, you don't have civil liberties.

In Loving Memory
1787 - 2008
Back to top
View user's profile Send private message
jtanner
Tux's lil' helper
Tux's lil' helper


Joined: 23 May 2002
Posts: 121
Location: Atlanta, GA

PostPosted: Thu Jun 13, 2002 1:53 am    Post subject: Reply with quote

Just to make sure: Neither the source nor destination is on a network mounted filesystem (nfs, samba, etc) or on removable media, right?

Jim
Back to top
View user's profile Send private message
Utoxin
Guru
Guru


Joined: 19 Apr 2002
Posts: 411
Location: Springville, UT

PostPosted: Thu Jun 13, 2002 2:01 am    Post subject: Reply with quote

I let it run this time, and it eventually made it through that file. And one of the next files was twice that size, and it's hanging there too. So it's something to do with large files. (Where large seems to mean >~20MB)

And no, it's not over the network or anything. It's all on the same hard disk.
Back to top
View user's profile Send private message
jtanner
Tux's lil' helper
Tux's lil' helper


Joined: 23 May 2002
Posts: 121
Location: Atlanta, GA

PostPosted: Thu Jun 13, 2002 2:28 am    Post subject: Reply with quote

Darn, I thought this was going to be easy! ;-)

How full is your disk? Any issues/info with XFS and GCC 3.1?

Well, when kill -9 fails to destroy a process, it's because it's blocking in the kernel (duh). Could this be a tunable parameter in XFS? I've never used it, but I seem to remember reading that there are a bunch of tunable parameters that can make a big difference performance-wise.

Isn't XFS supposed to be GOOD with large files? :roll:

Jim
Back to top
View user's profile Send private message
Utoxin
Guru
Guru


Joined: 19 Apr 2002
Posts: 411
Location: Springville, UT

PostPosted: Thu Jun 13, 2002 2:33 am    Post subject: Reply with quote

Disk has gigs and gigs of space left.

There's no specific issues with GCC3.1, but they did say they didn't gauruntee it to work. I'm beginning to suspect that's at the root of the problem.

And there's not much on XFS in the kernel config. Mostly quota stuff. Which I have turned off.
Back to top
View user's profile Send private message
pjp
Administrator
Administrator


Joined: 16 Apr 2002
Posts: 16102
Location: Colorado

PostPosted: Thu Jun 13, 2002 2:36 am    Post subject: Reply with quote

I recall an fstab setting we used for Solaris that was related to large files, but I don't recall what it was. Any one know if this could be similar?
_________________
lolgov. 'cause where we're going, you don't have civil liberties.

In Loving Memory
1787 - 2008
Back to top
View user's profile Send private message
jtanner
Tux's lil' helper
Tux's lil' helper


Joined: 23 May 2002
Posts: 121
Location: Atlanta, GA

PostPosted: Thu Jun 13, 2002 2:42 am    Post subject: Reply with quote

I know this sucks, but....maybe try to recompile with GCC 2.95.3, and see what happens. You would just have to recompile the kernel and the tools, right?

Jim
Back to top
View user's profile Send private message
Utoxin
Guru
Guru


Joined: 19 Apr 2002
Posts: 411
Location: Springville, UT

PostPosted: Thu Jun 13, 2002 2:45 am    Post subject: Reply with quote

I'd also have to compile gcc 2.95. Wanna guess how long that'd take in my system's current condition? ;)
Back to top
View user's profile Send private message
jtanner
Tux's lil' helper
Tux's lil' helper


Joined: 23 May 2002
Posts: 121
Location: Atlanta, GA

PostPosted: Thu Jun 13, 2002 2:51 am    Post subject: Reply with quote

Ummm....no. :D

Precompiled binaries, maybe? Besides, it beats having to reformat your drive...

If you have a spare disk sitting around, maybe set that up as ext2/3 and use it to build the compiler, at least.

Jim
Back to top
View user's profile Send private message
Utoxin
Guru
Guru


Joined: 19 Apr 2002
Posts: 411
Location: Springville, UT

PostPosted: Thu Jun 13, 2002 9:26 pm    Post subject: Reply with quote

Well, I finally finished the upgrade to the latest gcc3, and did an mrproper compile of my kernel, and things seem to have improved. I'll let everyone know if I have any more problems.
Back to top
View user's profile Send private message
lx
Veteran
Veteran


Joined: 28 May 2002
Posts: 1012
Location: Netherlands

PostPosted: Thu Jun 13, 2002 9:49 pm    Post subject: Reply with quote

I remember having the same problems with Xfs (as I stated in the earlier post) also I got error with the preempt patch + xfs. Some pre-empt count wasn't zero after finishing some command (cp / something else), so I just dumped it, that's the kind of guy I am..... :wink: . Well I want a stable and reliable filesystem, not even one cp instruction may hang..... Are you getting the pre-empt count error.

Cya lX.
_________________
"Remember there's a big difference between kneeling down and bending over.", Frank Zappa
Back to top
View user's profile Send private message
Utoxin
Guru
Guru


Joined: 19 Apr 2002
Posts: 411
Location: Springville, UT

PostPosted: Thu Jun 13, 2002 10:12 pm    Post subject: Reply with quote

Preempt count is /rarely/ 0. It's not an error. It just means the kernel let something else take over the processor while it was running.
Back to top
View user's profile Send private message
mark
Tux's lil' helper
Tux's lil' helper


Joined: 04 Jun 2002
Posts: 119

PostPosted: Sat Jun 15, 2002 2:14 pm    Post subject: I had probs with cp -p and xfs Reply with quote

Its probably not related but you never know. When I had ACL in my use variables and compiled fileutils I would subsequently get error messages with cp -p. This has been reported to xfs who are putting some changes in cvs. They are also liasing with fileutils maintainers and the maintainers of a gentoo fileutils patch to try to find the route cause.

If your not using acl's you could see if use=ACL is set and disable it if it is. Then re emerge fileutils. I am not running gcc3 and my symptoms werent the same but it could be worth a try.

Mark
_________________
Regards

Mark
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index Other Things Gentoo All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum