I)

 i tapped into the following kernel trace, which locks down the directory it
 came up in and with the next flush it locks the whole the partition :-(

 d_cursor_hash_table: 256 buckets
 ef_hash_table: 8192 buckets
 z_hash_table: 8192 buckets
 z_hash_table: 8192 buckets
 j_hash_table: 16384 buckets
 loading reiser4 bitmap......done (4780 jiffies)
 VFS: Mounted root (reiser4 filesystem) readonly.
 .
 .
 .
 ------------[ cut here ]------------
 kernel BUG at fs/reiser4/block_alloc.c:149!
 invalid operand: 0000 [#1]
 Modules linked in: ipt_state ip_conntrack iptable_filter ip_tables usbhid
 uhci_hcd 8139too mii evdev usbcore
 CPU:    0
 EIP:    0060:[<c01b897f>]    Not tainted VLI
 EFLAGS: 00010297   (2.6.14) 
 EIP is at sub_from_ctx_grabbed+0xaf/0xc0
 eax: 00000000   ebx: 00000000   ecx: 00000001   edx: 00000000
 esi: f74eee00   edi: 00000001   ebp: 00000000   esp: f6eebca8
 ds: 007b   es: 007b   ss: 0068
 Process linux1 (pid: 5245, threadinfo=f6eea000 task=f71280b0)
 Stack: 00000000 00000000 f6e5eae0 f6eebe3c 00000000 f6e5eae0 c16dcc60 00000001 
        f6e5eae0 c1b98800 f74eee00 c01bb607 f74eee00 00000001 00000000 c039c554 
        f6e5eae0 f6e5eae0 f6e5eb25 f6e5eae0 c01974dc f6eea000 f6e5eae0 f6eea000 
 Call Trace:
  [<c01bb607>] grabbed2flush_reserved_nolock+0x67/0x1c0
  [<c01974dc>] znode_invariant_f+0x3dc/0x410
  [<c01c6e77>] do_jnode_make_dirty+0x187/0x460
  [<c020d17b>] is_plugin_id_valid+0x1b/0xa0
  [<c01c71c2>] jnode_make_dirty_locked+0x72/0x2c0
  [<c0250693>] save_static_sd+0xd3/0x210
  [<c01c757e>] znode_make_dirty+0x16e/0x650
  [<c0216a77>] update_sd_at+0x1f7/0x6e0
  [<c0216fe9>] update_sd+0x89/0x140
  [<c0213e2d>] write_sd_by_inode_common+0xdd/0x150
  [<c01bd424>] txn_begin+0x24/0x90
  [<c021e829>] sync_unix_file+0x59/0x1e0
  [<c0221851>] write_unix_file+0x471/0x6d0
  [<c01283a0>] autoremove_wake_function+0x0/0x60
  [<c0150fd5>] vfs_write+0xb5/0x190
  [<c015117b>] sys_write+0x4b/0x80
  [<c0102c0b>] sysenter_past_esp+0x54/0x75
 Code: 8b 02 8b 80 9c 00 00 00 89 44 24 0c 8b 02 c7 44 24 04 94 41 3b c0 c7 04
 24 3c b0 39 c0 05 a4 01 00 00 89 44 24 08 e8 21 01 fd ff <0f> 0b 95 00 26 f7 38
 c0 eb 84 8d b4 26 00 00 00 00 8b 4c 24 04 
Dec 19 19:49:22 tormented-soul kernel: d_cursor_hash_table: 256 buckets
Dec 19 19:49:22 tormented-soul kernel: ef_hash_table: 8192 buckets
Dec 19 19:49:22 tormented-soul kernel: z_hash_table: 8192 buckets
Dec 19 19:49:22 tormented-soul kernel: z_hash_table: 8192 buckets
Dec 19 19:49:22 tormented-soul kernel: j_hash_table: 16384 buckets
Dec 19 19:49:22 tormented-soul kernel: loading reiser4 bitmap......done (4780
jiffies) Dec 19 19:49:22 tormented-soul kernel: VFS: Mounted root (reiser4
filesystem) readonly.
Dec 19 19:49:22 tormented-soul kernel: d_cursor_hash_table: 256 buckets
Dec 19 19:49:22 tormented-soul kernel: ef_hash_table: 8192 buckets
Dec 19 19:49:22 tormented-soul kernel: z_hash_table: 8192 buckets
Dec 19 19:49:22 tormented-soul kernel: z_hash_table: 8192 buckets
Dec 19 19:49:22 tormented-soul kernel: j_hash_table: 16384 buckets
Dec 19 19:49:22 tormented-soul kernel: loading reiser4 bitmap......done (4780
jiffies) Dec 19 19:49:22 tormented-soul kernel: VFS: Mounted root (reiser4
filesystem) readonly.


this happens everytime i try to start 3 user-mode-linux instances with an
disk-image of approx 500mb each

the system('s) i get this on, are running gentoo linux with gcc4 +
glibc-2.3.6-nptl
  

kernel:
  linux-2.6.14
    patched with:
      *reiser4-for-2.6.14-1.patch :-)
      *reiser4-fix-fsync.patch
      *force-starget-scsi_level-in-usb-storage-scsigluec.patch
      *skas-2.6.14-v8.2.patch
      *suspend2-2.2-rc13-for-2.6.14

  update: the problem even occurs with only reiser4-for-2.6.14-1.patch applied,
          so the other patches should be safe
    
  linux-2.6.15-rc5-mm3, too - same error
    that version was additionally patched with:
      *reiser4-fix-fsync.patch
  

could this be a gcc4-bug? are there any known issues? haven't found any on the
net, yet - and it did definitely work with gcc4.0 and gcc4.1 and i never had
any problems with gcc4.

but i'll give gcc3 a shot if i can find a source-tarball lying around...


II)

there's also a warning i get each time the system is running:

"<4>reiser4[ktxnmgrd:hda4:r(651)]: disable_write_barrier
(fs/reiser4/wander.c:233)[zam-1055]: WARNING: disabling write barrier"

is this behaviour normal? should i be concerned about this WARNING?


III)

are there any mount/compile options, which could produce better performance with
larger files (i.e. 2gb and more)?





btw. reiser4 rocks a lot more than xfs/ext3 - good work :-)


thx for any help,

    Heiko

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