[ ssic-linux-Bugs-1811510 ] deadlock on loop mounted fs

Bugs item #1811510, was opened at 2007-10-11 14:22
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: John Hughes (hughesj)
Assigned to: Nobody/Anonymous (nobody)
Summary: deadlock on loop mounted fs

Initial Comment:
1. Make a sparse file

   perl -e 'open BIGFILE, ">BIGFILE"; seek BIGFILE, 1024 * 1024 * 1024, 0; print BIGFILE "big"'

2. make a filesystem on it

   losetup /dev/loop/0 BIGFILE
   mkfs -t ext3 /dev/loop/0

3. mount it

   mount -t ext3 /dev/loop/0 /mnt

4. write a lot of files to it

   cd /mnt
   dump 0f - / | restore rf -

eventualy the node where we are writing to the loopback mounted fs gets deadlocked.  It's still up as far as the cluster is concerned, but any attempt to start a process on it blocks.



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