Hello.

Please, try the attached patch: it should help...
I have also fixed a deadlock because of reiser4
lock ordering violation:

do_lo_send_aops() keeps page locked and calls file_update_time()
which calls reiser4_update_sd, which tries to acquire a longterm
lock (bad).

Thanks,
Edward.

On 05/15/2012 12:55 AM, Sandro Souza wrote:
> Hello my friends.
>
> I made a new custom distro based on debian squeeze, but with 2.6.39
> kernel, patched with reiser4

[...]

> Trying to copy a folder from a reiser3 partition to a reiser4
> partition, I got error messages.
>
> Testing my custom kernel with "preemption model" in "Preemptible
> Kernel", I got these messages:
>
> [  286.945598] ------------[ cut here ]------------
> [  286.945609] kernel BUG at fs/reiser4/block_alloc.c:151!
> [  286.945617] invalid opcode: 0000 [#1] PREEMPT SMP
> [  286.945626] last sysfs file:

[...]

> ffffffff8118e00d
> [  286.945808] Call Trace:
> [  286.945817]  [<ffffffff8117b484>] ? jnode_make_dirty_locked+0x112/0x18f
> [  286.945824]  [<ffffffff8117b529>] ? znode_make_dirty+0x28/0x87
> [  286.945831]  [<ffffffff8118e00d>] ? update_sd+0x344/0x3a4
> [  286.945838]  [<ffffffff81387a46>] ? sub_preempt_count+0x83/0x94
> [  286.945845]  [<ffffffff8118e096>] ? write_sd_by_inode_common+0x29/0x92
> [  286.945852]  [<ffffffff8103cb67>] ? get_parent_ip+0x9/0x1b
> [  286.945858]  [<ffffffff8118512b>] ? reiser4_dirty_inode+0x19/0x73
> [  286.945865]  [<ffffffff810edecb>] ? T.1132+0x12/0x2e
> [  286.945872]  [<ffffffff8104b288>] ? current_fs_time+0x1e/0x24
> [  286.945878]  [<ffffffff81112ddb>] ? __mark_inode_dirty+0x28/0x1c8
> [  286.945885]  [<ffffffff81108169>] ? file_update_time+0xf7/0x126
> [  286.945891]  [<ffffffff811924ee>] ? reiser4_write_end_careful+0x147/0x184
> [  286.945897]  [<ffffffff81115083>] ? pipe_to_file+0x152/0x161
> [  286.945903]  [<ffffffff81387af5>] ? add_preempt_count+0x9e/0xa0
> [  286.945909]  [<ffffffff81114f31>] ? generic_file_splice_write+0x133/0x133
> [  286.945914]  [<ffffffff811143cb>] ? splice_from_pipe_feed+0x6d/0xed
> [  286.945920]  [<ffffffff81114eb3>] ? generic_file_splice_write+0xb5/0x133
> [  286.945933]  [<ffffffff811162a6>] ? sys_splice+0x2f8/0x3d2
> [  286.945939]  [<ffffffff8138a7d2>] ? system_call_fastpath+0x16/0x1b
> [  286.945944] Code: 25 80 cc 00 00 53 48 83 ec 08 48 8b 80 38 05 00