[Pvfs2-users] Re: seqfault on "cp" when using pvfs2's kernel module

[Murali Vilayannur]

Hi Matt,

> What is still unresolved is the seqfault of the "cp" command when I try
> to copy
> something on my pvfs2 mounted tree:
> -----------8<----------------
> [root at node1 pvfs2]# mount | grep pvfs2
> tcp://node1:3334/pvfs2-fs on /mnt/pvfs2 type pvfs2 (rw)
> [root at node1 pvfs2]# pwd
> /mnt/pvfs2
> [root at node1 pvfs2]# ls -l
> total 6436
> drwxrwxrwx  1 root root    4096 Jun  6 22:29 lost+found/
> -rw-rw-rw-  1 root root 3291038 Jun  7 09:26 testfile
> [root at node1 pvfs2]# cp testfile testfile3
> Segmentation fault
> [root at node1 pvfs2]# cp testfile /root/testfile2
> cp: setting attributes for UHåHì: Operation not supported

Umm.. this is weird.. I will take a look at this on your setup..

> The last message indicates some attribute setting problems.
> Interestingly, "scp" fails
> like cp when copying out of the pvfs2 filesystem while it succeeds
> without seqfault
> if the target is remains on pvfs2:

Hmm.. it looks like some unaligned accesses may have crept into CVS head
causing cp/other programs to crash when using pvfs2..? Pete, did
you noticed anything that went in recently that may cause unaligned access violations?
BTW: Are there any tools for detecting this sort of thing? does valgrind
on opteron have an unaligned memory access plugin or something?
I will take a look at it and see if I can reproduce it...
Thanks,
Murali
>

> -----------8<----------------
> [root at node1 pvfs2]# scp testfile /root/testfile4
> cp: setting attributes for UHåHì: Operation not supported
> [root at node1 pvfs2]# scp testfile testfile4
> ----------->8----------------
>
>
> My storage areas are on ext3 filesystems.  My pvfs2-fs.conf and pvfs2tab
> are attached.
> I'm running yesterday's (06/06/06) CVS version.
>
> ... Matt
>
>