From mboxrd@z Thu Jan  1 00:00:00 1970
From: John Wyzer <john.wyzer@gmx.de>
Subject: btrfsck segmentation fault + trace
Date: Wed, 16 Jun 2010 17:52:40 +0200
Message-ID: <4C18F348.80509@gmx.de>
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To: linux-btrfs <linux-btrfs@vger.kernel.org>
Return-path: <linux-btrfs-owner@vger.kernel.org>
List-ID: <linux-btrfs.vger.kernel.org>

I tried 2.6.35-rc3 and got error messages during the boot process about not being able
to dirty inodes and no space left on device.

2.6.34.y runs fine and df -h shows
rootfs                296G  255G   39G  87% /

I reverted back to 2.6.34 and gave btrfsck a try resulting in a segmentation fault.

# btrfsck /dev/mapper/root 
parent transid verify failed on 217995780096 wanted 155238 found 155234
btrfsck: disk-io.c:416: find_and_setup_root: Assertion `!(!root->node)' failed.
Aborted (core dumped)


Core was generated by `btrfsck /dev/mapper/root'.
Program terminated with signal 6, Aborted.
#0  0xffffe424 in __kernel_vsyscall ()
(gdb) bt
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb76c2751 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0xb76c5b82 in *__GI_abort () at abort.c:92
#3  0xb76bb8b8 in *__GI___assert_fail (assertion=0x8062dc7 "!(!root->node)", file=0x8062d2d "disk-io.c", line=416, 
    function=0x8062fe0 "find_and_setup_root") at assert.c:81
#4  0x080525bb in find_and_setup_root (tree_root=0x9852008, fs_info=<value optimized out>, objectid=2, root=0x9852178)
    at disk-io.c:416
#5  0x08052dcd in open_ctree_fd (fp=3, path=0xbfd984f9 "/dev/mapper/root", sb_bytenr=0, writes=0) at disk-io.c:740
#6  0x0805303d in open_ctree (filename=0xbfd984f9 "/dev/mapper/root", sb_bytenr=0, writes=0) at disk-io.c:587
#7  0x0804d36b in main (ac=2, av=0xbfd98344) at btrfsck.c:2824
(gdb) 

Hope that helps in any way :-)
Best regards.