Daniel,
Awesome! the bug was in readdir which was not flushing cache on seek
(rewinddir), hence used to return stale (deleted) entries which used to put
it in a loop. So rm -rf should work smooth now..
good catch! and thanks :)
avati
2007/7/2, Daniel van Ham Colchete <daniel.colchete@xxxxxxxxx>:
People,
I tried this here. I'm getting the very same results, but I noticed
something strace'ing the 'rm -rf *' process here.
All the unlink goes OK untill the rm process calls lseek at the directory
descriptor:
unlink("/proc/self/fd/5/00-INDEX") = 0
unlink("/proc/self/fd/5/Mylex.txt") = 0
getdents64(5, /* 0 entries */, 4096) = 0
lseek(5, 0, SEEK_SET) = 0
getdents64(5, /* 49 entries */, 4096) = 1760
unlink("/proc/self/fd/5/st.txt") = -1 ENOENT (No such file or
directory)
open(".", O_RDONLY|O_LARGEFILE) = 3
fchdir(5) = 0
unlink("st.txt") = -1 ENOENT (No such file or
directory)
fchdir(3) = 0
close(3) = 0
unlink("/proc/self/fd/5/ChangeLog.megaraid") = -1 ENOENT (No such file or
directory)
open(".", O_RDONLY|O_LARGEFILE) = 3
fchdir(5) = 0
unlink("ChangeLog.megaraid") = -1 ENOENT (No such file or
directory)
There is no lseek call before that.
The files being removed after that was already removed before. And now 'rm
-rf' starts to loop itself trying to lseek and remove the same files over
and over again.
Best regards,
Daniel
On 7/1/07, Harris Landgarten <harrisl@xxxxxxxxxxxxx> wrote:
>
> This bug is easily reproduced by copying the Linux source tree to
gluster
> and then trying to remove it with rm -rf
>
> Harris
>
> ----- Original Message -----
> From: "Majied Najjar" <majied.najjar@xxxxxxxxxxxxxxx>
> To: "Harris Landgarten" <harrisl@xxxxxxxxxxxxx>
> Cc: "gluster-devel" <gluster-devel@xxxxxxxxxx>
> Sent: Friday, June 29, 2007 4:01:09 PM (GMT-0500) America/New_York
> Subject: Re: Problem with rm -rf
>
> I have some core file outputs for the same operations:
>
> Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
> Core was generated by
>
`[glusterfsd] '.
> Program terminated with signal 11, Segmentation fault.
> #0 0xb7e50639 in ?? ()
> (gdb) bt
> #0 0xb7e50639 in ?? ()
>
> Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
> Core was generated by
>
`[glusterfsd] '.
> Program terminated with signal 11, Segmentation fault.
> #0 0xb7e92639 in ?? ()
> (gdb) bt
> #0 0xb7e92639 in ?? ()
>
> Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
> Core was generated by
> `[glusterfs] '.
> Program terminated with signal 11, Segmentation fault.
> #0 0xffffe410 in __kernel_vsyscall ()
> (gdb) bt
> #0 0xffffe410 in __kernel_vsyscall ()
> #1 0xb7f0aa8d in ?? ()
>
>
> On Fri, 29 Jun 2007 13:36:27 -0400 (EDT)
> Harris Landgarten <harrisl@xxxxxxxxxxxxx> wrote:
>
> > Avati,
> >
> > More info on rm -rf problem
> >
> > rm -rf * and find . -exec rm -rf {} \;
> >
> > both begin properly and then fall into a sequence of looking for
files:
> >
> > find . -type f -exec rm {} \;
> >
> > works fast and properly
> >
> > rm -rf * then works with empty dirs.
> >
> > Harris
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "Harris Landgarten" <harrisl@xxxxxxxxxxxxx>
> > To: "Anand Avati" <avati@xxxxxxxxxxxxx>
> > Cc: "gluster-devel" <gluster-devel@xxxxxxxxxx>
> > Sent: Thursday, June 28, 2007 9:21:46 AM (GMT-0500) America/New_York
> > Subject: Re: Problem with rm -rf
> >
> > the rm -rf hangs. It looks like one or two unlinks are sent to the
log.
> I can cntl-C the client and the data is still there. The data was is the
tmp
> dir from failed backups. It is gone now. I will investigate more when I
have
> more data later today.
> >
> > Harris
> >
> > ----- Original Message -----
> > From: "Anand Avati" <avati@xxxxxxxxxxxxx>
> > To: "Harris Landgarten" <harrisl@xxxxxxxxxxxxx>
> > Cc: "gluster-devel" <gluster-devel@xxxxxxxxxx>
> > Sent: Thursday, June 28, 2007 9:17:41 AM (GMT-0500) America/New_York
> > Subject: Re: Problem with rm -rf
> >
> > Strange,
> > what is your configuration? At the time of 'hang', is it possible for
> you to attach gdb to glusterfs and get a backtrace (from every thread,
by
> switching as 'thr 1' 'thr 2' etc) ?
> > rm -rf seems to work fine for me, wondering how find . -exec rm would
> make a difference.
> > thanks,
> > avati
> >
> > > I am trying to delete the contents of a tmp dir with 3 trees
> containing about 1.7G
> > > as root, from withint the top level tmp dir I issue
> > >
> > > rm -rf *
> > >
> > > and the command hangs are never returns.
> > >
> > > find . -exec rm -rf {} \;
> > >
> > > works as expected.
> > >
> > >
> > > Harris
> >
> >
> >
> >
> > _______________________________________________
> > Gluster-devel mailing list
> > Gluster-devel@xxxxxxxxxx
> > http://lists.nongnu.org/mailman/listinfo/gluster-devel
> >
> >
> > --
> > Anand V. Avati
> >
> >
> > _______________________________________________
> > Gluster-devel mailing list
> > Gluster-devel@xxxxxxxxxx
> > http://lists.nongnu.org/mailman/listinfo/gluster-devel
> >
> >
> >
> > _______________________________________________
> > Gluster-devel mailing list
> > Gluster-devel@xxxxxxxxxx
> > http://lists.nongnu.org/mailman/listinfo/gluster-devel
>
>
>
> _______________________________________________
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> Gluster-devel@xxxxxxxxxx
> http://lists.nongnu.org/mailman/listinfo/gluster-devel
>
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Anand V. Avati
